高温平板气膜冷却耦合换热实验与计算  

Experimental and numerical investigation of conjugate heat transfer to a high temperature flat plate with film cooling

作　　者：王文萍[1] 邹歆[1] 孙鹏[1] 林智荣[1] 任静[1] 袁新[1] 蒋洪德[1] 

机构地区：[1]清华大学热能工程系,动力机械与工程研究所,北京100084

出　　处：《清华大学学报（自然科学版）》2010年第12期1988-1993,共6页Journal of Tsinghua University(Science and Technology)

基　　金：国家“九七三”基础研究发展计划项目(2007CB210108);国家自然科学基金资助项目(50676043)

摘　　要：为研究实际高温流体下气膜冷却及内部冷却对燃机透平叶片的影响,搭建了气膜冷却高温燃气实验台,在此实验台上进行了超级合金平板气膜冷却耦合换热实验,同时进行了数值计算。计算中采用耦合与绝热两种方法并进行了对比,并考虑了不同含水量的影响。结果表明:是否采用耦合计算对流场影响不大,但对合金平板的温度场分布产生很大影响,这是由于耦合计算考虑了合金板的导热作用。计算结果对实验测量结果有10%的欠预测,这是由于没有考虑辐射换热所引起的。To investigate the effects of the film cooling and internal cooling on a high temperature gas turbine blade,a high temperature test rig was set up.A superalloy flat plate with film cooling injection was investigated experimentally and numerically.The effects of different water compositions were also considered.The conjugate heat transfer effect was compared with the adiabatic assumption and the experimental data.The results show that the conjugate heat transfer has little effect on the flow field,but has a great effect on the temperature distribution because of the high thermal conductivity of the plate.The numerical result underpredicts the experimental result by 10% due to neglecting the radiative heat transfer.

关 键 词：高温实验台 平板气膜冷却 流热耦合 

分 类 号：TK474.7[动力工程及工程热物理—动力机械及工程]