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Double-polygon-prism dynamic natural wind simulation generator

A multi-prism and generator technology, applied in space heating and ventilation, space heating and ventilation details, household heating, etc., can solve the problems of not enough soft, changeable and comfortable air, and achieve easy installation and disassembly, Eliminate monotony, increase the effect of turbulent intensity

Inactive Publication Date: 2018-07-06
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a multi-prism imitation dynamic natural wind generator to solve the problem in the prior art that the air outlet of the indoor air-conditioning equipment is not soft enough, changeable and comfortable.

Method used

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  • Double-polygon-prism dynamic natural wind simulation generator
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  • Double-polygon-prism dynamic natural wind simulation generator

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Experimental program
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Effect test

Embodiment 1

[0060] When the multi-prisms are 5-6 prisms, the length × width × height of the room is 10 × 8 × 6m, the size of the end of the rectangular air duct is 320mm × 250mm; the air supply speed is 4m / s; the height of the rectangular air outlet from the ground is 4800mm; The number of rectangular air outlets is 4; the perimeters of the prisms of the Karman vortex street generator are respectively 800mm and 225mm; there are 2 return air outlets, and the size is 400×200mm.

[0061] In this embodiment, the κ-ε double-equation model is used for simulation calculation. The control equation is based on the above assumptions, and the time-average control equation of the κ-ε turbulence mathematical model is obtained, which is expressed in tensor form. The governing equations are established as follows:

[0062] Continuity equation:

[0063] Momentum equation:

[0064] Energy equation:

[0065] Where: i=1,2,2; j=1,2,3; u is indoor air velocity; k is turbulent pulsating kinetic energy...

Embodiment 2

[0074] When the polygonal prism is a triangular prism, the room length × width × height of this embodiment is 10 × 8 × 6m; the size of the end air duct is 320mm × 250mm; the air outlet speed is 4m / s; the height of the rectangular air outlet from the ground is 4800mm; The number of air outlets is 4; the side lengths of the Karman vortex street generator are respectively taken as 20mm and 60mm; there are 2 return air outlets, and the size is 400×200mm.

[0075] In order to verify the air outlet characteristics of the double triangular prism imitation dynamic natural wind generator, the gas flow in the simulated building space is regarded as an incompressible fluid; at the same time, the air temperature does not change much, that is, the density does not change much, so it can be considered as an indoor The air flow conforms to the Boussinesq assumption. For this purpose, the κ-ε double-equation model is used for simulation calculation. The control equation is based on the above ...

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Abstract

The invention provides a double-polygon-prism dynamic natural wind simulation generator. The double-polygon-prism dynamic natural wind simulation generator comprises a rectangular air pipe. A rectangular air supply port is formed in the tail end of the rectangular air pipe, and a karman vortex street generator is arranged in the rectangular air supply port and comprises two polygon prisms. The twopolygon prisms are perpendicular to the long edges of the rectangular air supply port. In the building space, air treated through an air conditioner system is conveyed to the tail end of the system,namely the position of the rectangular air sport through an air supply pipe, then, air passes through the karman vortex street generator, and when steady incoming flow bypasses the karman vortex street generator, double-row line vortex reverse in rotation direction and regular in arrangement can be periodically disengaged from the two sides of the karman vortex street generator, and the karman vortex street is formed under the nonlinear action. The turbulence liquidity and turbulence intensity of airflow are increased, speed fluctuation is increased, and the monotonous feeling of mechanical air supply is eliminated.

Description

technical field [0001] The invention belongs to the technical field of heating, ventilating and air-conditioning, and in particular relates to a multi-prism imitation dynamic natural wind generator. Background technique [0002] At present, the air supply method in the building space is mostly mixed ventilation based on the dilution principle; the traditional mixed ventilation system air supply outlet is usually installed on the top of the room or in the middle of the side wall. The air supply air enters the air-conditioned room in the form of a free jet. The free jet is characterized by high speed, large momentum and turbulent air supply. Because the air supply port is easy to arrange in the building space, it does not occupy the lower building space (working area), and the free jet mixes Ventilation is still widely used today. The most common orifice free jet configurations are figure 1 shown. The air supply method is the main factor affecting the thermal comfort of the...

Claims

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Application Information

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IPC IPC(8): F24F1/00F24F13/06F24F13/08
CPCF24F1/0011F24F13/06F24F13/081
Inventor 赵玉娇李若瑶姬长发张真豪
Owner XIAN UNIV OF SCI & TECH
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