圆拱型连栋温室自然通风流场CFD模拟

采用Ansys公司的FLUENT软件,建立温室的三维模型,研究了自然通风条件下平行于温室走向和垂直于温室走向两个风向,两种不同风速下温室内部及温室之间风流场的分布特点。模拟结果表明:当风速较小(1.6m/s)时,温室内风向复杂,出现低速涡旋,当风速较高(5.2m/s)时,温室内风向基本按原方向前进,风速逐渐减弱;当温室外风速为1.6m/s时,温室内大部分区域的风速在0.2m/s左右,当温室外风速为5.2m/s时,温室内大部分区域的风速在1.0m/s左右;连栋温室群中各部位温室的通风情况相差较大,前栋温室内风速明显高于后栋。该研究结果可作为温室生产与设计的参考依据。

CFD Numerical Simulation of Natural Ventilator in the Arched Multi-Span Greenhouse

We used FLUENT software of Ansys Company to establish three-dimensional natural ventilator model of the greenhouse.In the condition of two wind direction,we study the distribution characteristics of flow field of two wind speeds in greenhouse.The simulation results show that: When the wind speed is smaller(1.6 m/s),the greenhouse wind direction is complex and have low-speed vortex;when the wind speed is higher(5.2 m/s),wind speed is waning along the original direction;when wind speed is 1.6 m/s,wind speed in most regions of the greenhouse is 0.2 m/s,when the outside wind speed is 5.2 m/s,wind speed in most regions of the greenhouse is about 1.0 m/s.In the production base,wind speed is significantly higher than the back building wind speed.The study results can be used as a reference for greenhouse production and design.