无沸腾区振动喷雾冷却无量纲分析

Dimensionless Analysis of Vibration Spray Cooling in Non-Boiling Region

获取不同条件下的传热关联式是研究对流换热的根本任务,考虑到汽车在运行过程会不可避免地受到机械诱导振动,以无沸腾区喷雾冷却为研究对象,搭建了振动实验平台;根据实验所得数据,运用无量纲分析法拟合出振动喷雾冷却的传热关联式,最终验证了实验努塞尔数与预测努塞尔数误差范围小于10%,能够为工程应用提供参考。

Obtaining heat transfer correlations under different conditions is the fundamental task of studying convective heat transfer.Considering that the vehicle operation process will inevitably be subject to mechanically induced vibration,the paper takes the spray cooling in the non boiling zone as the research object,and builds a vibration test platform.According to the experimental data,the heat transfer correlations of vibration spray cooling are fitted by using dimensionless analysis method.Finally,it is verified that the error range between the actual Nusselt number and the predicted Nusselt number is less than 10%,which can provide a reference for engineering applications.