W型波纹板束的数值模拟和实验研究

Numerical simulation and experiment on W corrugated plates

运用Fluent软件对一种用于气-气换热的W型波纹板束进行了数值模拟研究。模型采用三板双流道的模式,分别模拟计算出不同热侧入口温度、热侧入口速度和冷侧入口速度的工况下,板束的换热效率及压力降,并进行对比分析。对W型波纹板式换热器进行实验研究,验证数值模拟和理论分析的合理性。研究结果表明:随冷热流体入口速度和热流体入口温度的增大,W型波纹板束的换热系数增大,同时压降也会增大。实验结果与模拟模拟结果基本一致且误差在15%左右。

The numerical simulation was performed for heat transfer and flow of W corrugated plates used in gas-gas heat exchanging by software Fluent. The model was built in the three-plate and double-channel mode. The geometric model was simulated and calculated respectively under different hot-side inlet temperature, different inlet velocity of hot fluid and different inlet velocity of cold fluid. The heat transfer efficiency of plates and the pressure drop were calculated, then compared and analysed. The experimental study was put on the W corrugated plate heat exchanger to validate the rationality of the numerical simulation and theoretical analysis. The results show that the heat transfer coefficient of W corrugated plates increases with the growth of the hot-side inlet velocity, the cold-side inlet velocity and the hot-side inlet temperature, and the pressure drop increases as well. The experimental results are consistent with the simulation results, and the errors are about 15%.