离心力场下多孔层的不同厚度对热驱动换热的影响  

Study effect of different thickness of porous layer on thermally driven heat transfer in a centrifugal force field

作　　者：夏婕 常海萍[2] 

机构地区：[1]空军第十三飞行学院司令部航空理论教研室,蚌埠233000 [2]南京航空航天大学能源与动力学院,南京210016

出　　处：《航空动力学报》2009年第1期44-49,共6页Journal of Aerospace Power

基　　金：国家自然科学基金(50276027);国防基础科研项目(J1400D001)

摘　　要：以涡轮叶片新型超级冷却技术的研究为背景,在具有冷却通道的新型冷却结构中加入多孔介质,采用实验与数值模拟相结合的方法研究了不同多孔层厚度条件下,新型冷却结构的热驱动换热规律,实验和计算结果基本一致.研究结果表明不同多孔层厚度条件下,该新型冷却结构具有相同的换热规律:随着旋转速度、热流密度和冷气进口速度的增大,该结构的热驱动换热能力逐渐增强.同时实验研究发现,随着多孔层厚度的增大,热驱动换热效果降低.Based on the research of turbine blade super cooling technology, porous medium was installed in a new kind of cooling configuration with cooling tunnels. Experiments and numerical simulations were carried out to investigate the thermally driven heat transfer rules in the new kind of cooling configuration with different thickness of porous layers in a centrifugal force field. The results of experiments and numerical simulations are consistent basically. The results of study show that the heat transfer rules of the new cooling configuration are identical under different thickness of porous layers. The thermally driven heat transfer of the cooling configuration filled with porous medium can be enhanced with increase of the rotate speed, heat flux and cooling air speed. At the same time, the heat transfer effect is weakened with increase of the thickness of porous layer.

关 键 词：多孔介质 厚度 热驱动 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]