基于CFD数值模拟方法的日光温室建模研究

Modeling Research on Greenhouse by Solar Heat Based on CFD Numerical Simulation Method

随着计算机软件技术的发展,CFD计算流体数值仿真模拟被广泛地应用到实际工程中,但是在农业方面的应用还比较少。CFD通过建模和数值仿真模拟可以对真实环境的尺寸以及外形进行数值建模,能够模拟真实环境的温度、压力以及速度场等参数,并将模拟结果进行二维和三维立体呈现。运用CFD数值模拟技术,以温室的生长环境为例,对温室通风前后的温度以及湿度情况进行了数值模拟仿真。通过计算发现温室最高温度由通风前的307K降低到了304K,有了明显的改变,验证了数值模拟计算机的准确性。通过对湿度的CFD数值模拟仿真发现,进行通风之后气体流动性比较好,没有出现热空气的集聚现象,非常有利于农作物的生长,从而为日光温室农作物生长环境的研究提供了理论参考。

With the development of computer software technology,CFD numerical simulation of fluid simulation has been more widely applied in practical engineering but less in agriculture.CFD can form the numerical modeling of the size and shape of real environment,it can simulate temperature,pressure and velocity field parameters of the real environment.We can compare the results of two-dimensional simulation with that of three-dimensional simulation.By using CFD numerical simulation technology,taking the environment for the growth of greenhouse as an example,the greenhouse ventilation,temperature and humidity were investigated by numerical simulation,the calculation showed that the maximum temperature of greenhouse ventilation reduced from 307K to 304k,which has changed significantly to verify the accuracy of the numerical simulation.Based on the numerical simulation of CFD,humidity,ventilation is good after gas liquidity without agglomeration of hot air,which is very conducive to the growth of crops and provides the theory reference for the crop growth environment of solar greenhouse.