Effects of Chemical Reaction Caused by Cooling Stream on Film Cooling Effectiveness  

作　　者：Keyong Cheng Shiqiang Liang Xiulan Huai Wei Chen Yongxian Guo 

机构地区：[1]Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China [3]School of Mechano-electronic Engineering, Xidian University, Xi’an 710071, Shaanxi, China

出　　处：《Journal of Thermal Science》2012年第1期60-65,共6页热科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No.50976118);the National Basic Research Program of China (973 Program) Grant No.G2010CB227302

摘　　要：With the increase of inlet temperature of gas turbines, the benefits by using the conventional methods are likely to approach their limits. Therefore, it is essential to study novel film cooling methods for surpassing these current limits. Based on the theory of heat transfer enhancement, a film cooling method with chemical reaction by cool- ing stream is proposed. In order to test the feasibility of the proposed method, numerical simulations have been conducted. The classic flat plate structure with a 30 degree hole is used for the simulation. In the present study, the effects of the parameters in relation to the chemical reaction on film cooling effectiveness, such as chemical heat sink, volume changes, and reaction rate, are investigated numerically. The conventional film cooling is also calculated for the comparison. The results show that film cooling effectiveness is improved obviously due to the chemical reaction, and the reaction heat and reaction rate of cooling stream have an important effect on film ef- fectiveness. However, the effect of volume changes can be ignored.

关 键 词：Gas turbine Film cooling Chemical reaction Heat transfer Numerical simulation 

分 类 号：V233.5[航空宇航科学与技术—航空宇航推进理论与工程] TQ330.73[化学工程—橡胶工业]