CN106918439A - A kind of Tornado simulator based on wind-tunnel, its operation method and its gained cyclone model - Google Patents
A kind of Tornado simulator based on wind-tunnel, its operation method and its gained cyclone model Download PDFInfo
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- CN106918439A CN106918439A CN201710150960.XA CN201710150960A CN106918439A CN 106918439 A CN106918439 A CN 106918439A CN 201710150960 A CN201710150960 A CN 201710150960A CN 106918439 A CN106918439 A CN 106918439A
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The present invention discloses a kind of Tornado simulator based on wind-tunnel, its operation method and its gained cyclone model, and wind tower is tube structure, installed in wind tunnel experiment section upper wall outside；Wind tower mainly includes fairing and guiding device；Fairing includes radome fairing and honeycomb；Radome fairing inside is installed by motor and fan propeller；By the Reynolds number for changing the rotational speed regulation flow field of motor；Guiding device is mainly the deflector for producing vortex wind field；The diameter parallel of honeycomb and motor；Lifting platform is arranged between the upper and lower hole wall of wind tunnel experiment section, by the height for moving up and down regulation flow field of lifting platform, and then adjusts the depth-width ratio in flow field；The translation effect by test model and cyclone is realized by the parallel moving mechanism of lifting platform upper surface.It is compact conformation of the present invention, easy to install, cyclone that can be more preferably under simulation nature different situations.
Description
Technical field
The present invention relates to a kind of Tornado simulator, more particularly to the use for laboratory Tornado simulator based on wind-tunnel.
Background technology
Cyclone is a kind of extreme weather phenomenon, and it has great destructive power.At present, ground for cyclone wind field characteristic
Studying carefully mainly has the methods such as wind field actual measurement, theory analysis, laboratory physical and numerical modeling, and laboratory physical simulating device
Most of principles for being all based on Ward type simulation systems are built.Ward types simulation system can simulate various similar cyclones
Vortex wind field, but the system cannot consider moving horizontally for cyclone.Haan etc. improves Ward types on Ward Research foundations
Simulation system, blower fan and deflector is all arranged on simulator top, and the level of cyclone is simulated by movable stand
Motion, test data has obtained the checking of Doppler's measured data.Wang Jin etc. is based on Haan patterns and intends system building TVS spouts
Wind simulator, the simulator can be moved in the horizontal direction, and maximum translational speed can only achieve 0.4m/s.Existing cyclone
Analogue means generally existing translational speed is small and the narrow problem of application field.
The content of the invention
In order to overcome the deficiencies in the prior art, have a wide range of application it is an object of the invention to provide one kind, it is easy to install,
The big Tornado simulator of translational speed adjusting range.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of use for laboratory Tornado simulator based on wind-tunnel, mainly including wind-tunnel, wind tower, deflector, motor, rectification
Cover, fan propeller, honeycomb and lifting platform；
Wherein, wind tower generally tube structure (external diameter R1, internal diameter R2), installed in wind tunnel experiment section upper wall outside；
Wind tower mainly includes fairing and guiding device；Fairing includes radome fairing and honeycomb；Inside radome fairing
The motor and fan propeller for providing wind regime are installed；Guiding device is mainly the deflector for producing vortex wind field；Deflector and tower body
The angle of normal is θ, and 20~60 degree of the scope of θ realizes the swirl ratio in regulation flow field by the size for adjusting θ；By changing electricity
The rotating speed of machine realizes the Reynolds number in regulation flow field；Honeycomb is used for rectification, the diameter parallel with motor.
Lifting platform is arranged between the upper and lower hole wall of wind tunnel experiment section, by the height for moving up and down regulation flow field of lifting platform
Degree, so as to realize adjusting the depth-width ratio in flow field.Realized by test model and cyclone by the parallel moving mechanism of lifting platform upper surface
Translation effect.When Tornado simulator works, lifting platform is in Setup Experiments highly；When simulator does not work, lifting
Platform is adjustable to and the lower bottom wall of wind tunnel experiment section.
The big aerodynamic force and thermodynamical equilibrium equation group balanced each other using pressure gradient-force, centrifugal inertial force and the power of stickiness power three,
Obtain the Mathematical Modeling such as following formula of the 3D velocity field of cyclone：
X (t)=R3e-atcos bt
Y (t)=R3e-atsin bt
Z (t)=- 2at
Wherein, a is swirl ratio,R3It is the initial radium of cyclone, H is the height in flow field, H=(H1-
H3)+(H2-H4), θ is deflector orientation angle, and b is cyclone angular velocity of rotation.
It is compact conformation of the present invention, easy to install, the maximum of air-flow can be simulated by Tornado simulator of the invention
Mobile is the cyclone of 30m/s, and adjusting range is big；Cyclone that can be more preferably under simulation nature different situations.
Brief description of the drawings
Fig. 1 is the structural representation of use for laboratory Tornado simulator of the present invention based on wind-tunnel；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is deflector deflection schematic diagram；
Fig. 4 is cyclone structural rail schematic diagram；
Fig. 5 is the cyclone structural rail schematic diagram for moving horizontally；
Fig. 6 is the translation effect diagram by test model and cyclone.
In figure：1st, wind-tunnel, 2, wind tower, 3, deflector, 4, motor, 5, radome fairing, 6, fan propeller, 7, honeycomb, 8, rise
Drop platform.
Specific embodiment
Technical scheme is illustrated below with reference to drawings and Examples：
The present invention relates to a kind of new Tornado simulator, as shown in figure 1, wind tower 2 is arranged on outside the experimental section upper wall of wind-tunnel 1
Side, wind tower 2 includes deflector 3 and radome fairing 5, and the motor 4 and fan propeller 6 for providing wind regime, honeycomb are installed in the inside of radome fairing 5
7 axis and the diameter parallel of motor 4, lifting platform 8 are arranged on the experimental section lower wall of wind-tunnel 1 inner side.Realization simulation is flowed by wind-tunnel
Cyclone is moved horizontally；The Reynolds number in regulation flow field is realized by the rotating speed for changing motor；By the installation for adjusting deflector
Angle, θ realizes the swirl ratio in regulation flow field；The height in regulation flow field is moved up and down by lifting platform, so as to realize adjusting flow field
Depth-width ratio；The translation effect by test model and cyclone is realized by the parallel moving mechanism of lifting platform upper surface.
Embodiment 1
By the Tornado simulator, the air balanced each other using pressure gradient-force, centrifugal inertial force and the power of stickiness power three
Power and thermodynamical equilibrium equation group, obtain the Mathematical Modeling of the 3D velocity field of cyclone.
Boussinesq containing pressure gradient-force, centrifugal inertial force and stickiness power approximate atmospheric dynamics and thermodynamics
(r, θ, z) form is formula (1) to the cylindrical coordinates of equation group：
Wherein,WithRespectively radially, the acceleration of tangential and vertical direction；
ρ0、T0And p0It is the density of basic field, temperature and air pressure；
P ' and T ' is disturbance and disturbance temperature；
Fr、Fθ、FzAnd FTRespectively three directions (r, θ, stickiness power z) and heat transfer；
N is buoyancy frequency,
Because the funnel structure of cyclone is axisymmetric, symmetry axis is takenIf (Fr,Fθ,Fz)=- v (vr,vθ,
vz), FT=-kT '/T0, and set vr、vθOnly, v relevant with rzOnly, T '/T relevant with z0As r, z are varied less, then formula (1) can be changed
Letter is
Wherein, υ, k and g are respectively viscosity coefficient, thermal conductivity factor and acceleration of gravity.
Because funnel structure is formed from stretching, extension from top to bottom, therefore, if
vz=2az (a ＞ 0, z ＜ 0) formula (7)
A is a positive constant in formula, and formula (7) is substituted into the radial velocity field that formula (5) obtains cyclone, sees formula (8)：
vr=-ar formulas (8)
Formula (8) is substituted into formula (3) and obtains following formula：
If taking viscosity coefficient υ=2a,
vθ=br formulas (9)
In formula, b is an integral constant.
Formula (7), formula (8) and the formula of formula (9) three are concluded together, is exactly the 3D velocity field of cyclone
So, the Cartesian form of the cyclone Mathematical Modeling that the new Tornado simulator shown in Fig. 1 is produced is
Wherein, a is swirl ratio,R3It is the initial radium of cyclone, H is the height in flow field, H=(H1-
H3)+(H2-H4), θ is deflector orientation angle, and b is cyclone angular velocity of rotation.
Formula (11) changes into polar form and is
Value in emulation：R3Scope 0.9m~the 2.15m of=0.6m, H, 20~60 degree of the scope of θ, the then scope 0.08 of a
~0.39, a takes 0.2 in emulation, and the rotating speed of motor 4 is 25rad/s, and b is 25rad/s.Cyclone structure obtained by embodiment 1
Track is as shown in Figure 4.
Embodiment 2
The wind-tunnel where new Tornado simulator shown in Fig. 1 can realize the evaluation of the maximum translational speed V of air-flow.
The cyclone Mathematical Modeling that new Tornado simulator shown in Fig. 1 is produced is：
Value in emulation：R3Scope 0.9m~the 2.15m of=0.6m, H, 20~60 degree of the scope of θ, the then scope 0.08 of a
~0.39, a takes 0.2 in emulation, and the rotating speed of motor 4 is 25rad/s, and b is 25rad/s.The then new cyclone simulation shown in Fig. 1
The cyclone maximum horizontal translational speed that device can be simulated is V=30m/s.Cyclone obtained by embodiment 2 is as shown in Figure 5.
Claims (5)
1. a kind of Tornado simulator based on wind-tunnel, it is characterised in that mainly including wind-tunnel, wind tower, deflector, motor, whole
Stream cover, fan propeller, honeycomb and lifting platform；
Wherein, wind tower generally tube structure, installed in wind tunnel experiment section upper wall outside；
Wind tower mainly includes fairing and guiding device；Fairing includes radome fairing and honeycomb；
Radome fairing inside is installed by motor and fan propeller；Guiding device is mainly the deflector for producing vortex wind field；Honeycomb is used
In rectification, the diameter parallel with motor；Lifting platform is arranged between the upper and lower hole wall of wind tunnel experiment section.
2. the Tornado simulator based on wind-tunnel according to claim 1, it is characterised in that described deflector and tower body
The angle of normal is θ, and the scope of θ is 20~60 degree.
3. the Tornado simulator based on wind-tunnel according to claim 1, it is characterised in that when Tornado simulator work
When, lifting platform is in Setup Experiments highly；When simulator does not work, lifting platform is adjusted to and the lower bottom wall of wind tunnel experiment section.
4. the operation method of the Tornado simulator based on wind-tunnel described in claim 1, it is characterised in that：By changing motor
Rotational speed regulation flow field Reynolds number；By the height for moving up and down regulation flow field of lifting platform, and then it is wide to adjust the height in flow field
Than；The translation effect by test model and cyclone is realized by the parallel moving mechanism of lifting platform upper surface；By the size for adjusting θ
Realize the swirl ratio in regulation flow field.
5. the cyclone model obtained by the Tornado simulator based on wind-tunnel described in claim 1, it is characterised in that three-dimensional speed
Spend the Mathematical Modeling such as following formula of field：
X (t)=R3e-atcosbt
Y (t)=R3e-atsinbt
Z (t)=- 2at
Wherein, a is swirl ratio,R3It is the initial radium of cyclone, H is the height in flow field, H=(H1-H3)+
(H2-H4), θ is deflector orientation angle, and b is cyclone angular velocity of rotation.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782522A (en) * | 2017-09-08 | 2018-03-09 | 合肥工业大学 | A kind of more swirl ratio equipment for simulating tornado |
| CN107860547A (en) * | 2017-11-08 | 2018-03-30 | 重庆交通大学 | A kind of integrated environment wind tunnel simulation device |
| CN108254151A (en) * | 2018-03-16 | 2018-07-06 | 国网福建省电力有限公司 | A kind of multi-fan active control cyclone wind-tunnel |
| CN110006618A (en) * | 2019-05-23 | 2019-07-12 | 重庆大学 | The mobile cyclone wind-tunnel of simulation background wind and wave synergy |
| CN110006622A (en) * | 2019-05-23 | 2019-07-12 | 重庆大学 | The physical simulating method and device that wave is coupled with mobile cyclone |
| CN110006624A (en) * | 2019-05-23 | 2019-07-12 | 重庆大学 | The physical simulating method that Background wind is coupled with mobile cyclone |
| CN110006623A (en) * | 2019-05-23 | 2019-07-12 | 重庆大学 | The two-in-one simulator of cyclone, downburst and its analogy method |
| CN110031178A (en) * | 2019-05-23 | 2019-07-19 | 重庆大学 | A kind of integrated wind-tunnel for simulating cyclone and downburst |
| CN110044580A (en) * | 2019-05-23 | 2019-07-23 | 重庆大学 | The physical simulating method and device that wave is coupled with mobile downburst |
| CN110044572A (en) * | 2019-05-23 | 2019-07-23 | 重庆大学 | Tornado simulator horizontally moving device |
| CN110082057A (en) * | 2019-04-22 | 2019-08-02 | 南京航空航天大学 | A kind of novel multi-fan array cyclone wind-tunnel and simulation of wind method |
| CN110132529A (en) * | 2019-05-23 | 2019-08-16 | 重庆大学 | Simulate the physical unit of mobile downburst |
| CN111238758A (en) * | 2020-03-06 | 2020-06-05 | 东南大学 | Bidirectional movement tornado simulator |
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| CN110220664A (en) * | 2017-09-08 | 2019-09-10 | 合肥工业大学 | A kind of device of the mobile cyclone of analog equivalent |
| CN107782522A (en) * | 2017-09-08 | 2018-03-09 | 合肥工业大学 | A kind of more swirl ratio equipment for simulating tornado |
| CN107860547A (en) * | 2017-11-08 | 2018-03-30 | 重庆交通大学 | A kind of integrated environment wind tunnel simulation device |
| CN108254151A (en) * | 2018-03-16 | 2018-07-06 | 国网福建省电力有限公司 | A kind of multi-fan active control cyclone wind-tunnel |
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| CN110006622A (en) * | 2019-05-23 | 2019-07-12 | 重庆大学 | The physical simulating method and device that wave is coupled with mobile cyclone |
| CN110006624B (en) * | 2019-05-23 | 2020-01-17 | 重庆大学 | Physical simulation method for coupling background wind and mobile tornado |
| CN110044580B (en) * | 2019-05-23 | 2024-05-24 | 重庆大学 | Physical simulation method and device for coupling wave and movable downward storm |
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| CN111238758A (en) * | 2020-03-06 | 2020-06-05 | 东南大学 | Bidirectional movement tornado simulator |
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