簧片阀流量系数的实验研究与数值模拟

在压缩机簧片阀的数值模拟中,簧片阀的流量系数和相应的有效流通面积是须预先知道的关键参数。一般来说,流量系数和有效流通面积是通过实验测得的。但是,当制冷剂在封闭的系统中流动时,很难测得簧片阀的流量系数。本论文提出了一种思路,建立以空气为工质来测量簧片阀流量系数的模型,同时用静态吹风实验来测量空气的流量系数,得到了空气在不同流量和阀片升程下的流量系数。改变工质为R600a后,模拟计算了簧片阀的流量系数,并通过压缩机整机性能实验对流量系数的正确性进行了间接的验证。结果表明:以空气为工质模拟计算的流量系数与实验结果符合较好,这一模型能够用于计算工质为R600a时的流量系数。

Experimental Study and Numerical Simulation on Reed Valve Flow Coefficient

In a complex simulation of a household refrigerator compressor, the flow coefficient and the corresponding effective flow area of the reed valve are key parameters which should be known previously. In general, the flow coefficient and the corresponding effective flow area can be obtained by experiment. But in fact, it is hard to measure flow coefficient of the reed valve with refrigerant flowing in a closed system. A new method is presented in this paper. A simulation model is built to get the flow coefficient of the reed valve with working medium of air. In addition, we measure the flow coefficients of air by static blow experiment and obtain flow coefficients in varying flux and valve lifts. Changing the medium to R600a, we obtained the flow coefficient of reed valve by numerical simulation. And through the compressor performance test, we validate the correction of flow coefficient indirectly. The results show that the numerical simulation results coincide well with the experiment results as the working medium was air. This model can be used to calculate flow efficient of working medium for R600a.