CN100533094C

CN100533094C - Annular back-flow vertical wind tunnel, and its back-flow method

Info

Publication number: CN100533094C
Application number: CNB2006100837882A
Authority: CN
Inventors: 刘福长; 刘晓萌
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-06-06
Filing date: 2006-06-06
Publication date: 2009-08-26
Anticipated expiration: 2026-06-06
Also published as: CN1851435A

Abstract

The invention relates to a circuit plumping wind tunnel and the backflow method. The wind tunnel includes power includes power system and working tunnel identity. The working tunnel identity includes air intake end, stable section, contracted section, working section and air discharge end. The feature is that the wind tunnel contains a crust covering outside the working tunnel identity. A circle channel is set between the working tunnel identity and the crust. The air would blow from the air intake of the working tunnel identity and blow out form the air outlet of the working tunnel identity. The invention has low power request, easy to design and construct, low noise and could be used all weather. It is economy, safe, and confortabel.

Description

Annular backflow vertical wind tunnel and reflow method thereof

Technical field

The present invention relates to be used for the vertical wind tunnel of parachuting training and fleet-footed runner's motion, relate in particular to a kind of annular backflow vertical wind tunnel and reflow method thereof.

Background technology

A kind of special ground test equipment---the vertical wind tunnel of aviation field just builds up many as far back as last century with the developed country headed by the U.S..In recent years, in order to carry out parachutist and parachutist training in control of fall stage health and artistic performance, the rise of and a kind of fashion Leisure Sport campaign---fleet-footed runner motion, aviation vertical wind tunnel developed and develop into a kind of new civilian be main fleet-footed runner's motion vertical wind-tunnel.High velocity air in the vertical wind tunnel flight capsule can make parachutist and parachutist obtain the training of high-efficiency high-quality, also can make airhog's obtain to hover enjoyment of sky.Up to the present, European and American countries has been built up many this flight capsule equipment.The number that the U.S. builds up is maximum, and has obtained widespread use.A kind of vertical wind tunnel training system is disclosed for No. 6083110 such as United States Patent (USP), this wind-tunnel is open type (promptly funnel-shaped), dependence places several fans on wind-tunnel top as its power system, effect by these several fans, working gas in the wind-tunnel is discharged in the external environment, air pressure in the wind-tunnel will be lower than external atmosphere pressure, thereby make outside air enter wind-tunnel by the air intake of its underpart, realize the circulation of working gas.U.S. Pat 2006/0025227A1 discloses another kind of vertical wind tunnel system schema, this wind-tunnel is a kind of return circuit wind tunnel, but its reflow method refluxes or dual reflux for the duct type list, produces high velocity air and realize backflow in flight capsule by fan system and the complicated pipelines system that places top.

But there is following shortcoming in existing vertical wind tunnel: adopt open type (promptly funnel-shaped) more, though simple in structure, highly big, noise is high, and be subjected to extraneous weather effect bigger, restricted its use; Existing duct type backflow wind-tunnel return line designs, construction is all very complicated; And the exchange of wind-tunnel inner air and ambient atmosphere is seldom, is difficult for heat radiation, make wind-tunnel work a period of time after, internal reflux too high temperature of air, and stale easily makes the people not feel well, and should not work long hours.At present, developed country and China are developing novel, economic, safe, comfortable vertical wind tunnel energetically, so that better meet the requirement of training and amusement aspect.

Summary of the invention

It is low to the purpose of this invention is to provide a kind of power demand, and noise is lower, safe, comfortable, can adapt to the annular backflow vertical wind tunnel and the reflow method thereof of various meteorological conditions.

Be realization the object of the invention, and propose following technical scheme:

A kind of annular backflow vertical wind tunnel, comprise power system and work hole body, wherein said work hole body comprises the inlet inlet end, stable section, contraction section, active section, and outlet exhaust end, it is characterized in that: described wind-tunnel also comprises a shell that covers in outside the body of described work hole, a circular passage is arranged between described work hole body and described shell, described power system is blown into air from described work hole body inlet inlet end, pass described work hole body and blow out, be back to described work hole body inlet inlet end through described circular passage from described work hole body outlet exhaust end.

Above-mentioned annular backflow vertical wind tunnel, described power system is located at the inlet inlet end of described work hole body, and described work hole body outlet exhaust end is provided with the backflow air deflector.

Above-mentioned annular backflow vertical wind tunnel, described backflow air deflector is have center taper thing bowl-shape, is buckled on the body of described work hole.

Above-mentioned annular backflow vertical wind tunnel is provided with one deck diaphragm and fairing at least in the described backflow air deflector.

Above-mentioned annular backflow vertical wind tunnel, described shell upper is provided with at least one exhausting window, and the bottom is provided with at least one air intake window, and the position between described shell and described work hole body and below exhausting window is provided with damping screen.

Above-mentioned annular backflow vertical wind tunnel, described active section xsect is a polygon.

Above-mentioned annular backflow vertical wind tunnel, described shell makes by transparency material at the active section place at least with work hole body or described work hole body inwall is provided with electronic curtain or picture at the active section place at least.

A kind of annular backflow vertical wind tunnel reflow method, be used for above-mentioned annular backflow vertical wind tunnel, during wind-tunnel work, air is blown into from work hole body inlet inlet end, blow out from work hole body outlet exhaust end after passing work hole body, air blows out the back by work hole body and realizes refluxing by the circular passage between shell and the work hole body.

Above-mentioned annular backflow vertical wind tunnel reflow method, the backflow air deflector of the outlet exhaust end by being located at described work hole body in the air reflux course refluxes.

Above-mentioned annular backflow vertical wind tunnel reflow method also by at least one exhausting window of being located at body case top, described work hole and at least one air intake window of being located at outer casing underpart, carries out ventilation to return air in the air reflux course.

Good effect of the present invention is: (1) annular backflow vertical wind tunnel of the present invention is by form annular backflow work between shell and work hole body, power requires low than open type, it is simple than duct type backflow wind-tunnel to design, construct, especially the hole external noise is low for noise, can round-the-clockly use, economical, safe, comfortable.(2) annular backflow vertical wind tunnel of the present invention adopts vaulted backflow air deflector, makes airflow direction change 180 °, easy realization backflow, and reduced energy loss; This air deflector is have center taper thing bowl-shape, and center taper thing wherein can prevent the generation of eddy current, and the profile of air deflector indent and the split-flow baffles of setting and fairing can improve water conservancy diversion, prevent serious separation.(3) shell of annular backflow vertical wind tunnel of the present invention is provided with air intake window and exhausting window, can guarantee the wind-tunnel long-play during air fresh, and can make temperature be controlled at suitable temperature range.Exhausting window lower position place is provided with damping screen between wind-tunnel shell and work hole body, can make online side's gas pressure intensity be a bit larger tham outside atmosphere and press, and is beneficial to the discharge of top hot-air, simultaneously, the noise that damping screen also helps to reduce the recirculating zone is set.(4) shell that annular backflow vertical wind tunnel of the present invention is vertical and work hole body are made by transparency material in the active section district at least, the hole body inwall of perhaps working is provided with electronic curtain or picture at the active section place at least, makes aviator's can obtain to hover truly feels of sky.In addition, the active section xsect of annular backflow vertical wind tunnel of the present invention is a polygon, is convenient to mounting plane glass.

Description of drawings

Fig. 1 is the structural representation of annular backflow vertical wind tunnel of the present invention.

Fig. 2 is a power system blower fan plane of arrangement synoptic diagram.

Fig. 3 is the active section schematic cross-section.

Embodiment

The invention will be further described below in conjunction with drawings and Examples, but should be noted that these embodiment only are used to illustrate the solution of the present invention, and scope of the present invention can not be confined to this.

As shown in Figure 1, annular backflow vertical wind tunnel of the present invention has following a few major part: the power system 1 of underlying, shell 2, support 3, work hole body 4, and backflow air deflector 5.Below respectively with regard to these several most of principle of work that native systems are described.

In the present embodiment, power system of the present invention is different from the overhead power system of existing wind-tunnel, but power system 1 is placed the bottom of whole vertical wind tunnel, compare with the overhead power system, She Ji advantage is the weight and the vibration that not only can alleviate support 3 carryings like this, and can reduce installation cost greatly, and be convenient to overhaul of the equipments.As shown in Figure 1, place below ground in this embodiment even with power system 1, reduced especially hole external noise of noise simultaneously.

As shown in Figure 1, annular backflow vertical wind tunnel of the present invention comprises a shell 2, this makes the work hole body 4 of wind-tunnel of the present invention be in indoor that shell 2 forms, though whole wind-tunnel system places the outside atmosphere environment, but be not subjected to external environment and climatic influences, can round-the-clock running, improved service efficiency greatly.

Support 3 is arranged between shell 2 and the work hole body 4, be used for structures such as supporting shell 2, work hole body 4 and backflow air deflector 5, because the present invention, has alleviated the weight and the vibration of support 3 carryings with power system 1 underlying, requirement of strength for support 3 just reduces greatly, and cost just can significantly lower.

Work hole body 4 is major parts of wind-tunnel, and air is entered by the bottom of work hole body 4, flows out from work body 4 tops, hole, and shown in the direction of arrow among Fig. 1, work of the present invention hole body 4 mainly comprises stable section 42, contraction section 43, active section 44, diffuser 45.

The effect of backflow air deflector 5 be will from work body 4 tops, the hole air transition flow that flow out vertically upward to, change into vertically downward, thereby the annular that realizes wind-tunnel of the present invention refluxes.Backflow air deflector 5 be shaped as back-off have the bowl-shape of center taper thing, the profile of its indent and split-flow baffles 51 and fairing are beneficial to airflow direction changes 180 ° downwards, and reduces energy loss.

More than be the narration of native system principle of work,, describe the present invention below in conjunction with specific embodiment.

As shown in Figure 1, power system 1 is placed in below ground in this embodiment, and the power system 1 of present embodiment comprises six groups of electric systems 11, and every group of electric system 11 comprises motor 111 and fan 112, be evenly horizontally disposed at below ground, as shown in Figure 2 with the annular of work hole body 4 concentrics.Every power of motor is 132 to 220 kilowatts.Certainly, the present invention can also adopt the electric system of other number, can adopt flexible and changeable various motors, combination of fans as required.The setting of many group low-power machines has been avoided adopting single large-size machine, fan system, can adopt the low-tension supply of 380V, convenient operation.Simultaneously, adopt many group micro-machines, fan system, noise is low, and cost is low, has reduced the overall height of wind-tunnel, is easy to manufacturing, installation, maintenance, replacing; And can start motor, the fan of varying number, so flexible operation be changeable according to wind-tunnel user's what and demand, energy conservation potential is big.The very important point is when one group of motor wherein, when fan breaks down suddenly in addition, and the motor of other group, fan still can operate as normal, thereby can avoid the generation of security incident effectively.In addition, motor 111 drives fan 112 rotations by transmission shaft in the electric system 11, can shorten the fan segment length, and help motor radiating, can turn round for a long time.

When wind-tunnel of the present invention is started working, motor 111, fan 112 are opened, air enters fans entrance air inlet section 121, fans entrance air inlet section 121 and outlet exhaust section 122 are respectively equipped with turning vane in

corner

113 and 114, can make the air-flow that enters vertically downward become horizontal direction earlier in the porch of fan 112, and then become steadily outflow vertically upward, thereby farthest reduced energy loss.

As shown in Figure 1, the power system 1 of annular backflow vertical wind tunnel of the present invention also comprises a gas collection section 141, designed a conical inner body 1411 in the gas collection section 141, described conical inner body 1411 is made by steel or other material, be positioned at gas collection section 141 centers, with work hole body 4 concentrics, height is close with gas collection section 141, and the drift angle angle is 45 ° to 60 °.The effect of described conical inner body 1411 is to cooperate the outer wall of gas collection section 141 that the xsect of gas collection section 141 is risen along with air-flow and expansion gradually, thereby the exit flow from a plurality of fans 112 is slowed down, enter work hole body 4 reposefully, thereby form the sudden enlargement of area when having avoided that fan 112 outlet is directly connected to work hole body 4, reduced energy loss.

Air-flow enters stable section 42 of work hole body 4 by the bottom more reposefully by gas collection section 141, makes air-flow honeycomb 421 vertically upward what stable section 42 also was equipped with, and the honeycomb lattice bore of described honeycomb 421 is 50 to 60mm, and length is 500 to 600mm.

After working air current enters contraction section 43, for the air-flow that guarantees to enter active section 44 evenly, stable, the side of contraction section 43 is the contractive effect good stream shape, shrinkage ratio (shrinkage ratio is an inlet area and the ratio of discharge area) is 2.5 to 4.0.

Active section 44 bottoms are provided with safety net 440, safety net 440 can guarantee that the personnel in the active section 44 in any case can not crash into active section 44 belows, and when personnel fall and safety net 440 bump against and damage, safety net 440 needs the elasticity of enough intensity and appropriateness.

Active section 44 bores are 3 to 4 meters, highly are 3 to 6 meters, and inner wind speed is 50 to 65 meter per seconds.Active section 44 is divided into active section 441 and last active section 442 down, and the outer wall of following active section 441 is straight wall, helps obtaining stable air-flow.Last active section 442 is the low-angle expansion segment, the full-shape of expansion angle is 6 ° to 8 °, increases (air viscosity formed one deck low velocity gas thin layer on body surface is called boundary-layer or boundary layer) and avoids aircrew's lapse rate too fast with boundary-layer on the compensation wall.Should go up active section 442 is main movement area, and promptly personnel mainly carry out flight training or amusement in this section.In the present embodiment, active section 44 and shell 2 are octagon with active section 44 corresponding section xsects, as shown in Figure 3, compare with circle, are more convenient for installing glass, and processing cost also reduces greatly.Certainly, in other embodiments, this xsect also can other polygon or circle.The side of active section 44 is provided with workplace and stops district's (not shown), is convenient to staff's control and trainer and aviator and stops when wind-tunnel is worked, has a rest.Active section 44 and diffuser 45 junctions are provided with transition fill block 450, and the polygonal cross-section that active section 44 is exported carries out the transition to circle, with diffuser 45 good being connected to be arranged.

In active section 44, for the aviator can being obtained hover the truly feels of sky, shell of the present invention 2 and work hole body 4 and active section 44 corresponding sections by transparent material as: glass, acrylic etc. is made, shell 2 remainders can be opaque material, as being made by fiberglass, metal etc., work hole body 4 remainders are steel or other material _ make.Certainly, if work hole body inwall is provided with electronic curtain or picture at the active section place at least, also can obtain similar effect.

Diffuser 45 is positioned at active section 44 tops, the diffusion angle of diffuser 45 (spread angle is angle between the expansion wall) is 8 ° to 12 °, (too small diffusion angle causes diffuser long to reduce height and to avoid taking place burbling as far as possible, excessive spread angle makes the flow shedding wall, causes separation flow) reduce energy loss.

The effect of backflow air deflector 5 be will from work body 4 tops, the hole air transition flow that flow out vertically upward to, change into vertically downward, thereby the annular that realizes wind-tunnel of the present invention refluxes.Backflow air deflector 5 be shaped as back-off have the bowl-shape of center taper thing, the orifice plate 52 that the profile of its indent and built-in multilayer split-flow baffles 51 and round platform surface form will reduce the loss of energy to greatest extent, and helps turning to of air-flow.The fairing that refluxes in the present embodiment in the air deflector 5 is the orifice plate 52 that the round platform surface forms, and certainly, also can be other form in other embodiments.

Working air current enters reflux section 46 between shell 2 and work hole body 4 downwards along backflow air deflector 5, is sent to fans entrance air inlet section 121 then under the road direction, has so just finished the cyclic process of working air current in wind-tunnel of the present invention.

In addition, be unlikely to too high for making the temperature through the working gas in the wind-tunnel behind the long-play, guarantee that simultaneously the air in the active section 44 keeps fresh, shell 2 tops are provided with several exhausting windows 21, and the bottom is provided with several air intake windows 22.At any time all can according to circumstances control air inflow, the working gas that portion temperature is raise can be discharged the wind-tunnel system by

exhausting window

21,21 lower position places are provided with damping screen 211 at exhausting window, make the air pressure of damping screen 211 tops be a bit larger tham the external environment atmospheric pressure, the working gas of being convenient to heat can be discharged in right amount, simultaneously, this net also helps further to reduce the noise in the reflux section 46.Meanwhile, be provided with a plurality of air intake windows 22 below reflux section 46, the fresh air in the external environment replenishes air intake hole system at any time by air intake window 22, and is suitable, fresh to guarantee the working gas temperature during long-play in the wind-tunnel.

Reach the gas collection section around the fan and be provided with quieter and quieter material (not shown), guaranteed that wind-tunnel of the present invention has the low noise characteristics.

Be provided with the elevator (not shown) between shell 2 and the work hole body 4, to make things convenient for personnel's active section 44 of coming in and going out.

In other embodiments, basic identical in annular backflow vertical wind tunnel and the foregoing description, but for easy for installation, the power system of underlying also can be not interposing among the melt pit, but place more than the ground; At this moment, because air flow can not be subjected to the influence of melt pit, and equipment is simplified more.

Obviously, the above embodiment of the present invention only is for example of the present invention clearly is described, and is not to be qualification to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.

Claims

1, a kind of annular backflow vertical wind tunnel, comprise power system and work hole body, it is characterized in that: wherein said work hole body comprises the inlet inlet end, make vertically upward stable section of air-flow, the contraction section that sidewall upwards shrinks gradually, active section, and outlet exhaust end, described active section comprises that sidewall is the make progress last active section of low-angle expansion of the following active section of straight wall and sidewall, the full-shape of described expansion angle is 6 ° to 8 °, described wind-tunnel also comprises a shell that covers in outside the body of described work hole, a circular passage is arranged between described work hole body and described shell, described power system is blown into air from described work hole body inlet inlet end, pass described work hole body and blow out, be back to described work hole body inlet inlet end through described circular passage from described work hole body outlet exhaust end.

2, annular backflow vertical wind tunnel according to claim 1, it is characterized in that: described power system is located at the inlet inlet end of described work hole body, and described work hole body outlet exhaust end is provided with the backflow air deflector.

3, annular backflow vertical wind tunnel according to claim 2, it is characterized in that: described backflow air deflector is have center taper thing bowl-shape, is buckled on the body of described work hole.

4, annular backflow vertical wind tunnel according to claim 3 is characterized in that: be provided with one deck diaphragm and fairing at least in the described backflow air deflector.

5, according to claim 1,2 or 3 described annular backflow vertical wind tunnels, it is characterized in that: described shell upper is provided with at least one exhausting window, the bottom is provided with at least one air intake window, and the position between described shell and described work hole body and below exhausting window is provided with damping screen.

6, according to claim 1,2 or 3 described annular backflow vertical wind tunnels, it is characterized in that: described active section xsect is a polygon.

7, according to claim 1,2 or 3 described annular backflow vertical wind tunnels, it is characterized in that: described shell makes by transparency material at the active section place at least with work hole body or described work hole body inwall is provided with electronic curtain or picture at the active section place at least.

8, a kind of annular backflow vertical wind tunnel reflow method, be used for wind-tunnel as claimed in claim 1, during wind-tunnel work, air is blown into from work hole body inlet inlet end, blow out from work hole body outlet exhaust end after passing work hole body, it is characterized in that: air blows out the back by work hole body and realizes refluxing by the circular passage between shell and the work hole body.

9, method according to claim 8 is characterized in that: the backflow air deflector of the outlet exhaust end by being located at described work hole body in the air reflux course refluxes.

10, according to Claim 8 or 9 described methods, it is characterized in that: in the air reflux course,, return air is carried out ventilation also by at least one exhausting window of being located at body case top, described work hole and at least one air intake window of being located at outer casing underpart.