离心-温度复合试验箱温度场模拟分析

对离心-温度复合试验箱中离心环境对温度场均匀性影响进行了模拟研究,并分析了结构条件对温度均匀性的改善效果。研究了离心-温度复合条件下的控制方程,以此为基础采用有限元分析的方法,对不同结构条件的温度场分析了温度均匀性差异,并提出了进一步改善温度均匀性的方法。结果表明,离心环境下的科氏力对空气流场轴向运动的影响会导致试验箱内温度均匀性差异,试验箱中加入风扇和导流装置能够有效改善内部温度均匀性。

Simulation on Temperature Fields of a Test Chamber Combined by Centrifugal Situation and Temperature

The effect of centrifugal situation on temperature fields of a test chamber combined by centrifugal situation and temperature is simulated and researched. The improvement of structural modification on the evenness of temperature fields was also studied. On the basis of hy-drodynamic heat transfer equations, the condition of temperature fields in the test chamber was simulated in the condition of centrifugal accelera-tions with and without structural modification by using finite element analysis method. The differences of temperature fields evenness were ana-lyzed and the improvement methods were proposed. The results show that Coriolis component of centrifugal acceleration can affect the axial distri-bution of fluid field in the test chamber, which is responsible for the unevenness of temperature fields. The installation of convection fan and flow guiding device can effectively improve the evenness of temperature fields of the test chamber under centrifugal acceleration condition.