An Experimental Study on the Effects of a Film Cooling Configuration and Mainstream Temperature on Depositing

作     者：LIU Zhengang LIU Zhenxia ZHANG Fei LIU Yanan 

作者机构：School of Power and Energy Northwestern Polytechnical University 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2019年第28卷第2期

页      面：360-369页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

主　　题：depositing film cooling dilute multiphase flow 

摘      要：The effects of a film cooling configuration and mainstream temperature on the depositing of particles are experimentally studied by using plate models. The particles are generated by melting wax and atomizing it. One model has a film cooling configuration and the other does not. The experimental results show that the film cooling configuration does not influence the depositing on the leading edge of the model very significantly. However, the film cooling configuration could increase the depositing on the upper surface of the model dramatically since the flow structure on the upper surface is changed due to the film cooling configuration. The effect of the mainstream temperature on the depositing is studied by using the model with film cooling configuration. The lower and higher mainstream temperature both could reduce the depositing. However, the mechanisms are different. The lower mainstream temperature could make more molten particles become solid particles, which could rebound from the surface of the model, reducing the depositing. The higher mainstream temperature could make all particles remain molten with higher temperature. In this case, more particles could splash from the surface of the model. Therefore, there may be a mainstream temperature at which the depositing mass is maximum.