CN108253524A - Double polygon prisms imitate dynamic natural wind generator - Google Patents
Double polygon prisms imitate dynamic natural wind generator Download PDFInfo
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- CN108253524A CN108253524A CN201711408363.9A CN201711408363A CN108253524A CN 108253524 A CN108253524 A CN 108253524A CN 201711408363 A CN201711408363 A CN 201711408363A CN 108253524 A CN108253524 A CN 108253524A
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- karman vortex
- vortex street
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/081—Air-flow control members, e.g. louvres, grilles, flaps or guide plates for guiding air around a curve
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The present invention provides a kind of double polygon prisms to imitate dynamic natural wind generator, and including rectangular air duct, the end of rectangular air duct is provided with rectangular air supply opening, and Karman vortex street generator is provided in rectangular air supply opening；Karman vortex street generator is two polygon prisms, and two polygon prisms are vertical with the long side of rectangular air supply opening.The present invention is in space, the processed air of air-conditioning system, system end is sent to through ajutage, i.e. at rectangle air port, then by Karman vortex street generator, for permanent incoming around in Karman vortex street generator, the Karman vortex street generator both sides direction of rotation that periodically can come off is opposite, the biserial line vortex of queueing discipline, forms Karman vortex street after nonlinear interaction.Make the disorderly mobility turbulence intensity of air-flow increase, the dull sense of mechanical air supply is eliminated in velocity perturbation increase.
Description
Technical field
The invention belongs to Heating,Ventilating and Air Conditioning technical fields, and in particular to a kind of polygon prism imitates dynamic natural wind generator.
Background technology
At present, the air supply mode in space is mostly the mixed ventilation based on diluting principle；Traditional mixing is led to
Wind system air outlet is typically mounted at the top of room or in the middle part of side wall.Air-supply air-flow enters air-conditioned room in the form of free jet
Between, the characteristics of free jet is that speed is high, momentum is big blows with turbulent flow, because air outlet is easily arranged on space, does not account for
With lower part space (workspace), free jet mixed ventilation is still widely used so far.Most common aperture free jet
Structure is as shown in Figure 1.Air supply mode is the principal element for influencing human thermal comfort, and rational air supply mode can not only improve people
Blowing comfort, can also improve the temperature upper limit of human thermal comfort, reduce air conditioning energy consumption.Therefore, natural imitation wind can be passed through
Meet the comfort of human body, improve room conditioning, promote the human oriented design of air-conditioning equipment.Air-supply is to change Indoor Thermal ring
One of principal element of border and influence human thermal comfort, the air draught that different air supply modes is formed is in VELOCITY DISTRIBUTION, rapids
Intensity of flow, spectrum signature etc. are all there are larger difference, and generated blowing feeling is also very different.Relative to
For dull mechanical blowing, natural wind is with pure and fresh, soft, changeable and comfortable mobilism air-flow and by the generally happiness of people
Love.Air-flow mobilism, comfortableization are to improve the important directions of building thermal environments.
The phenomenon that Karman vortex street is important in hydrodynamics can often encounter in nature.Fluid bypasses non-streamline object
During body, pairs of, being alternately arranged, that direction of rotation the is opposite antisymmetry generated at left and right sides of object wake flow is vortexed, jet stream knot
Fruit is as shown in Figure 2.Karman vortex street is a kind of phenomenon that viscous incompressible fluid dynamics are studied.The high opium of fluid winding flow
Chimney, skyscraper, electric wire, oil-piping and heat exchanger tube bank when can all generate Karman vortex street.1911, Germany scientist Feng
Toll bar has found the rationale of this vortex stabilization from aerodynamic viewpoint.But utilize this week of Karman vortex street
Phase, alternately variation property so that the application that Karman vortex street has some critically important, such as Karman vortex street flowmeter is can be made into,
The speed of fluid or flow are determined by measuring the shedding frequence of vortex.Patent of the present invention is exactly to utilize Karman vortex street principle,
A kind of air outlet of novel air conditioning system end is invented, which can send out the dynamic air current for being similar to natural wind so that
Tradition machinery air circulation jet is more nearly natural wind, improve the blowing feeling of people by.
Invention content
In view of the deficiencies of the prior art, the present invention intends to provide a kind of polygon prism and imitate dynamic natural wind hair
Raw device, solves the problems, such as that the outlet air of room conditioning in the prior art is not soft enough, changeable and comfortable.
In order to solve the above-mentioned technical problem, the present invention is realised by adopting the following technical scheme：
A kind of double polygon prisms imitate dynamic natural wind generator, and including rectangular air duct, the end of the rectangular air duct is provided with
Rectangular air supply opening is provided with Karman vortex street generator in the rectangular air supply opening；The Karman vortex street generator is rib more than two
Column, two polygon prisms are vertical with the long side of rectangular air supply opening.
Further, the opposite long side inner wall of the rectangular air supply opening two is equipped with guide rail, Karman vortex street generator
Both ends are separately positioned in guide rail, and can be moved left and right along guide rail.
Further, it further includes to adjust the control mechanism that Karman vortex street generator moves left and right frequency in guide rail.
Further, the frequency that the Karman vortex street generator moves left and right in guide rail is 6 times/min~15 time/min.
Further, the outer edge of the Karman vortex street generator is flushed with the outer edge of rectangular air supply opening.
Further, the polygon prism can be 3 prisms or 5~9 prisms.
Further, when the polygon prism is 5~9 prism, perimeter and the rectangular air supply opening long side side of the polygon prism
Long ratio is 0.25~0.70.
Further, when the polygon prism is 3 prism, perimeter and the rectangular air supply opening length of long sides of the polygon prism
Ratio is 0.06~0.19.
Further, the material of the polygon prism is wooden, plastics or metal.
Compared with prior art, the present invention it has the following technical effect that：
The present invention is formed using integration, simple in structure, easy for assemble or unload.In space, air-conditioning system processing
The air crossed is sent to system end through ajutage, i.e., at rectangle air port, then by Karman vortex street generator, permanent incoming exists
Around in Karman vortex street generator, Karman vortex street generator both sides periodically can come off direction of rotation on the contrary, arrangement rule
Biserial line vortex then, forms Karman vortex street after nonlinear interaction.Make the disorderly mobility turbulence intensity of air-flow increase, speed wave
The dull sense of mechanical air supply is eliminated in dynamic increase.Increase additionally, due to its turbulence intensity, make human body in the convective exchange with environment
The quantity of heat convection increase, thus enhance the cooling effect of air-flow, personnel feel more comfortable.
Description of the drawings
Fig. 1 is circular orifice free jet structure diagram；
Fig. 2 is Karman vortex street schematic diagram；
Fig. 3 is that the double polygon prisms of the present invention imitate dynamic natural wind generator structure diagram under an embodiment；
Fig. 4 is that the double polygon prisms of the present invention imitate dynamic natural wind generator structure diagram under an embodiment；
Double pentagonal prism wind velocity distributing paremeter histograms when Fig. 5 (a) is mechanical blowing of the present invention；
Fig. 5 (b) is double pentagonal prism wind velocity distributing paremeter histograms when Karman vortex street generator perimeter takes 80mm；
Fig. 5 (c) is double pentagonal prism wind velocity distributing paremeter histograms when Karman vortex street generator perimeter takes 225mm；
Double seven prism wind velocity distributing paremeter histograms when Fig. 6 (a) is mechanical blowing of the present invention；
Fig. 6 (b) is double seven prism wind velocity distributing paremeter histograms when Karman vortex street generator perimeter takes 80mm；
Fig. 6 (c) is double seven prism wind velocity distributing paremeter histograms when Karman vortex street generator perimeter takes 225mm；
Double nine prism wind velocity distributing paremeter histograms when Fig. 7 (a) is mechanical blowing of the present invention；
Fig. 7 (b) is double nine prism wind velocity distributing paremeter histograms when Karman vortex street generator perimeter takes 80mm；
Fig. 7 (c) is double nine prism wind velocity distributing paremeter histograms when Karman vortex street generator perimeter takes 225mm；
Fig. 8 (a) is the present invention when single polygon prism Karman vortex street generator perimeter and rectangle air port long side ratio are 0.25
When double pentagonal prisms turbulence intensity cloud atlas；
Fig. 8 (b) is the present invention when single polygon prism Karman vortex street generator perimeter and rectangle air port long side ratio are 0.25
When double pentagonal prisms contoured velocity figure
Fig. 9 (a) is the present invention when single polygon prism Karman vortex street generator perimeter and rectangle air port long side ratio are 0.25
When double seven prisms turbulence intensity cloud atlas；
Fig. 9 (b) is the present invention when single polygon prism Karman vortex street generator perimeter and rectangle air port long side ratio are 0.25
When double seven prisms contoured velocity figure
Figure 10 (a) is the present invention when single polygon prism Karman vortex street generator perimeter and rectangle air port long side ratio are 0.25
The turbulence intensity cloud atlas of Shi Shuanjiu prisms；
Figure 10 (b) is the present invention when single polygon prism Karman vortex street generator perimeter and rectangle air port long side ratio are 0.25
The contoured velocity figure of Shi Shuanjiu prisms
Figure 11 (a) is the present invention when single polygon prism Karman vortex street generator perimeter and rectangle air port long side ratio are 0.70
When double pentagonal prisms turbulence intensity cloud atlas；
Figure 11 (b) is the present invention when single polygon prism Karman vortex street generator perimeter and rectangle air port long side ratio are 0.70
When double pentagonal prisms contoured velocity figure
Figure 12 (a) is the present invention when single polygon prism Karman vortex street generator perimeter and rectangle air port long side ratio are 0.70
When double seven prisms turbulence intensity cloud atlas；
Figure 12 (b) is the present invention when single polygon prism Karman vortex street generator perimeter and rectangle air port long side ratio are 0.70
When double seven prisms contoured velocity figure
Figure 13 (a) is the present invention when single polygon prism Karman vortex street generator perimeter and rectangle air port long side ratio are 0.70
The turbulence intensity cloud atlas of Shi Shuanjiu prisms；
Figure 13 (b) is the present invention when single polygon prism Karman vortex street generator perimeter and rectangle air port long side ratio are 0.70
The contoured velocity figure of Shi Shuanjiu prisms；
Wind velocity distributing paremeter histogram when Figure 14 (a) is mechanical blowing of the present invention；
Figure 14 (b) is wind speed probability point of the present invention when Karman vortex street generator seamed edge takes 20mm towards the length of side on the outside of air hose
Cloth histogram；
Figure 14 (c) is wind speed probability point of the present invention when Karman vortex street generator seamed edge takes 60mm towards the length of side on the outside of air hose
Cloth histogram；
Figure 15 (a) is that the present invention works as single triangular prism Karman vortex street generator seamed edge towards the length of side on the outside of air hose and rectangle air port
Turbulence intensity cloud atlas when long side ratio is 0.19；
Figure 15 (b) is that the present invention works as single triangular prism Karman vortex street generator seamed edge towards the length of side on the outside of air hose and rectangle air port
Contoured velocity figure when long side ratio is 0.06；
The meaning of each label is in figure：1- rectangular air ducts, 2- rectangular air supply openings, 3- Karman vortex street generators, 4- controls
Mechanism.
Explanation is further explained in detail to the particular content of the present invention below in conjunction with attached drawing.
Specific embodiment
It should be noted that as shown in Figure 3, Figure 4, two long sides of rectangular air supply opening 2 refer to the top in figure in the application
Side and base, the left and right both direction for referring to extending along rectangular air supply opening long side in the application.
In space, the processed air of air-conditioning system is sent to system end through ajutage, i.e., at rectangle air port 2,
Then by Karman vortex street generator 3, permanent incoming is around in Karman vortex street generator 3,3 both sides of Karman vortex street generator
It periodically can come off direction of rotation on the contrary, the biserial line vortex of queueing discipline, forms Karman vortex street after nonlinear interaction.
Make the disorderly mobility turbulence intensity of air-flow increase, the dull sense of mechanical air supply is eliminated in velocity perturbation increase.
Specific embodiments of the present invention are given below, it should be noted that the invention is not limited in implement in detail below
Example, all equivalents done on the basis of technical scheme each fall within protection scope of the present invention.
Embodiment：
Above-mentioned technical proposal is deferred to, as shown in Figure 3 to Figure 4, the present embodiment provides a kind of double polygon prisms and imitates dynamic natural wind
Generator, including rectangular air duct 1, the end of rectangular air duct 1 is provided with rectangular air supply opening 2, and toll bar is provided in rectangular air supply opening 2
Vortex generator 3.The eddy airstream natural wind simulating generated in the present embodiment using Karman vortex street generator is soft, changeable and easypro
Suitable blowing feeling by.This air-supply arrangement can not only improve the blowing feeling of people by can also improve in the temperature of human thermal comfort
Limit reduces air conditioning energy consumption.It also contributes to improve room conditioning, promotes the human oriented design of air-conditioning equipment, improve Indoor Temperature
Spend environmental quality.
Karman vortex street generator 3 in the present embodiment is two polygon prisms, length of two polygon prisms with rectangular air supply opening 2
Side is vertical, and polygon prism can be the prism of 3 prisms or 5 prisms~9, and the material of polygon prism is wooden, plastics or metal.
When polygon prism is 5 prisms~9 prism, the ratio of the perimeter and 2 length of long sides of rectangular air supply opening of polygon prism is
0.25~0.70, when ratio is less than 0.25, Karman vortex street phenomenon unobvious, natural-wind-imitating effect is bad, when ratio is more than
When 0.70, on the other hand one side Karman vortex street phenomenon unobvious can influence the air output of air hose.
When polygon prism is triangular prism, the diameter of triangular prism and the ratio of 2 length of long sides of rectangular air supply opening for 0.25~
0.70, when ratio is less than 0.25, Karman vortex street phenomenon unobvious, natural-wind-imitating effect is bad, when ratio is more than 0.70, one
On the other hand aspect Karman vortex street phenomenon unobvious can influence the air output of air hose.
In the present embodiment the opposite long side inner wall of rectangular air supply opening 2 two be equipped with guide rail, the two of Karman vortex street generator 3
End is separately positioned in guide rail, and can be moved left and right along guide rail.It in this way, can by moving left and right Karman vortex street generator 3
The wind energy that rectangular air supply opening 2 is sent out is made enough to realize that left and right is swept to blow, will not only concentrate and dry on one point, human body sensory is more comfortable.
In order to more intelligent, the present embodiment further includes to adjust the control that Karman vortex street generator 3 moves left and right frequency in guide rail
Mechanism 4 processed, it is 6 times/min~15 time/min that can control the frequency that toll bar vortex generator 3 moves left and right in guide rail.
The present embodiment proposed following two implementation to verify that double polygon prisms imitated dynamic natural wind generator goes out wind characteristic
Example：
Embodiment 1：
When polygon prism is 5~6 prism, room length × width × height is provided as 10 × 8 × 6m, rectangular air duct tip dimensions are
320mm×250mm；Air supply velocity is 4m/s；Rectangle air port is 4800mm away from ground level；Rectangle air port number is 4；Toll bar
The prism perimeter of vortex generator takes respectively：800mm、225mm；Return air inlet 2, size are 400 × 200mm.
The present embodiment carries out simulation calculating using κ-ε two-equation models, and governing equation obtains on the basis of assumed above
To each hourly value governing equation of κ-ε turbulent flow mathematical models, represented with tensor form.It is as follows to establish governing equation group：
Continuity equation：
The equation of momentum：
Energy equation：
Wherein：I=1,2,2；J=1,2,3；U is room air speed；K is turbulence pulsation kinetic energy；T is Interior Space temperature
Degree；μ is laminar flow dynamic viscosity；μtFor turbulent kinetic viscosity；P is air pressure；ρ is atmospheric density；CpFor specific heat at constant pressure
Hold；Q is heat flow density；β is the fluid volume coefficient of expansion；C is flue gas concentration；FcFor flue gas incidence；ccFor constant；PrIt is general
Lang Te numbers.
Air-flow velocity degree of fluctuation can be represented with turbulence intensity.Turbulence intensity is defined as the standard deviation of velocity perturbation with putting down
The ratio between equal speed, it illustrates that the fluctuations in wind speed in a certain period is horizontal.
Under turbulence state, the motion morphology of air-flow is extremely unstable for natural wind many places as caused by atmospheric circulation.
It takes on air hose central axes apart from air outlet distance respectively 200mm, 400mm, 600mm, 800mm, 1000mm five
Point remembers A1, A2, A3, A4, A5.It is simulated using Fluent softwares.When Karman vortex street generator (3) perimeter take 80mm,
When 225mm, that is, Karman vortex street generator perimeter and rectangle air port long side ratio are 0.25,0.70, pentagonal prism, seven prisms, nine prisms
Natural-wind-imitating and mechanical blowing (i.e. air supply duct end does not add Karman vortex street generator) turbulence intensity analog result be shown in Table 1,
Each group rate results are shown in attached drawing 5~7.
Each point turbulence intensity when 1 Karman vortex street generator perimeter of table takes 80mm, 225mm
Embodiment 2：
When polygon prism is triangular prism, the present embodiment room length × width × height is 10 × 8 × 6m；End air hose size is
320mm×250mm；Go out wind velocity for 4m/s；Rectangle air port is 4800mm away from ground level；Rectangle air port number is 4；Toll bar
The length of side of vortex generator takes respectively：20mm、60mm；Return air inlet 2, size are 400 × 200mm.
It, will be in institute's simulant building space in order to verify that double triangular prisms imitated dynamic natural wind generator goes out wind characteristic
Gas flowing is considered as incompressible fluid；Air temperature variations are little simultaneously, i.e., variable density is little, it can thus be assumed that Interior Space
Flow of air meets Boussinesq hypothesis.It selects thus and simulation calculating is carried out using κ-ε two-equation models, governing equation is upper
On the basis of face is assumed, each hourly value governing equation of κ-ε turbulent flow mathematical models is obtained, is represented with tensor form.Establish control
Equation group is as follows：
Continuity equation：
The equation of momentum：
Energy equation：
Wherein：I=1,2,2；J=1,2,3；U is room air speed；K is turbulence pulsation kinetic energy；T is Interior Space temperature
Degree；μ is laminar flow dynamic viscosity；μtFor turbulent kinetic viscosity；P is air pressure；ρ is atmospheric density；CpFor specific heat at constant pressure
Hold；Q is heat flow density；β is the fluid volume coefficient of expansion；C is flue gas concentration；FcFor flue gas incidence；ccFor constant；PrIt is general
Lang Te numbers.
Air-flow velocity degree of fluctuation can be represented with turbulence intensity.Turbulence intensity is defined as the standard deviation of velocity perturbation with putting down
The ratio between equal speed, it illustrates that the fluctuations in wind speed in a certain period is horizontal.
Under turbulence state, the motion morphology of air-flow is extremely unstable for natural wind many places as caused by atmospheric circulation.
It takes on air hose central axes apart from air outlet distance respectively 200mm, 400mm, 600mm, 800mm, 1000mm five
Point, note A1, A2, A3, A4, A5 are triangular prism seamed edge towards the point on the outside of air hose；It is triangular prism seamed edge court to remember B1, B2, B3, B4, B5
Point on the outside of air hose.It is simulated using Fluent softwares；When Karman vortex street generator (3), diameter takes 20mm, 60mm i.e. toll bar
When the vortex generator length of side and rectangle air port long side ratio are 0.06,0.19, natural-wind-imitating and mechanical blowing (i.e. air supply duct end
Karman vortex street generator is not added) turbulence intensity analog result is shown in Table 2, and each group rate results are shown in attached drawing 14~15.
Each point turbulence intensity when the 2 Karman vortex street generator length of side of table takes 20mm, 60mm
By simulation, obtain compared with the wind speed of the mechanical blowing variation that traditional rectangle air port is sent out, by double more ribs
The velocity perturbation for the natural-wind-imitating that column dynamic natural wind generator is sent out is larger, and the turbulence intensity of natural-wind-imitating is also greater than mechanical blowing
Turbulence intensity.This can make people experience the airflow fluctuation of natural-wind-imitating.The airflow fluctuation variation of natural-wind-imitating can make one to produce
It is raw to arrive nature, pure and fresh and comfort.Reduce the dull sense of mechanical wind waved.On the other hand dynamic natural wind is imitated by double polygon prisms
The turbulence intensity for the natural-wind-imitating that generator is sent out is larger, increases the quantity of heat convection of the human body in the convective exchange with environment
Greatly, thus the cooling effect of air-flow is enhanced.Influence of the turbulence intensity of air-flow to cooling effect be it will be evident that but it must also be noted that
Influence to turbulence intensity to human thermal comfort.When turbulivity is excessive, the strong fitful wind because of caused by excessive airflow fluctuation
Human body can be caused uncomfortable.
In addition compared with traditional mechanical blowing, the speed variation of natural-wind-imitating is very big, and is at random and not true
Fixed.In terms of current research, the VELOCITY DISTRIBUTION of mechanical blowing imitates dynamic natural wind in relatively regular normal distribution by double polygon prisms
The VELOCITY DISTRIBUTION for the natural-wind-imitating that generator is sent out but is in not the normal distribution of completely random variable, but due to by turbulent flow
Indirect influence, make VELOCITY DISTRIBUTION deviate normal distribution.Wind speed profile is in the natural-wind-imitating ratio of partial velocities in normal state point
The mechanical blowing of cloth has better acceptance.Air-flow this is mainly due to partial velocities is more easy to the fluctuating that people is made to feel wind speed
Fluctuating change, and low wind speed action time is longer, also reduces the feeling of fatigue of blowing.
Claims (9)
1. a kind of double polygon prisms imitate dynamic natural wind generator, which is characterized in that including rectangular air duct (1), the rectangular air duct
(1) end is provided with rectangular air supply opening (2), and Karman vortex street generator (3) is provided in the rectangular air supply opening (2)；It is described
Karman vortex street generator (3) is two polygon prisms, and two polygon prisms are vertical with the long side of rectangular air supply opening (2).
2. double polygon prisms according to claim 1 imitate dynamic natural wind generator, which is characterized in that the rectangular air supply opening
(2) two opposite long side inner walls are equipped with guide rail, and the both ends of Karman vortex street generator (3) are separately positioned in guide rail, and can
It is moved left and right along guide rail.
3. double polygon prisms according to claim 2 imitate dynamic natural wind generator, which is characterized in that further include to adjust
Karman vortex street generator (3) moves left and right the control mechanism (4) of frequency in guide rail.
4. double polygon prisms according to claim 3 imitate dynamic natural wind generator, which is characterized in that the Karman vortex street hair
The frequency that raw device (3) moves left and right in guide rail is 6 times/min~15 time/min.
5. double polygon prisms according to claim 1 imitate dynamic natural wind generator, which is characterized in that the Karman vortex street hair
The outer edge of raw device (3) is flushed with the outer edge of rectangular air supply opening (2).
6. double polygon prisms according to claim 1 imitate dynamic natural wind generator, which is characterized in that the polygon prism can be with
For 3 prisms or 5~9 prisms.
7. double polygon prisms according to claim 6 imitate dynamic natural wind generator, which is characterized in that when the polygon prism is
During 5~9 prism, the perimeter of the polygon prism is 0.25~0.70 with the ratio of rectangular air supply opening (2) length of long sides.
8. double polygon prisms according to claim 6 imitate dynamic natural wind generator, which is characterized in that when the polygon prism is
During 3 prism, the perimeter of the polygon prism is 0.06~0.19 with the ratio of rectangular air supply opening (2) length of long sides.
9. double polygon prisms according to claim 1 imitate dynamic natural wind generator, which is characterized in that the material of the polygon prism
Expect for wooden, plastics or metal.
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| 付强: "《高等流体力学》", 30 April 2015 * |
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Application publication date: 20180706 |