猪舍温度场和气流场的CFD模拟比较分析

CFD Simulation and Comparative Analysis about Air Temperature and Airflow in the Piggery

为了比较纵向和横向通风方式对猪舍的降温效果,以种公猪舍为模拟对象,利用计算流体力学方法分别对纵向和横向两种通风方式下的舍内温度场和气流场进行了模拟,并对模拟结果进行了比较分析。结果表明,横向通风时,公猪栏内部分区域的气温能够保持在25℃左右,大部分区域气温低于28℃;纵向通风时,虽然部分猪栏内能够形成25℃左右的适宜气温,但靠近出口处的5个猪栏温度基本为30℃,局部温度甚至达到了31℃。说明横向通风方式不仅能够在舍内形成均匀的气流场,而且还能够明显降低公猪栏内的环境温度。

The simulation of air temperature and airflow speed by horizontal ventilation and vertical ventilation in boar piggery was studied with computational fluid dynamics （CFD）, and simulation result by horizontal ventilation was compared with the one by vertical ventilation with respect to discuss the cooling effect by two different ventilation in boar piggery. The simulation results showed that air temperature in most area of swineries was less than 28℃, especially the one in some area remained about 25℃; the air temperature in some swineries kept about 25℃, suitable to boars, but the air temperature in some swineries near to outlets was 30℃, even the partial area was 31℃. The results indicated that horizontal ventilation was effective to uniform airflow and lowered the air temperature in boar swineries.