The Effect of Blowing Ratio in Internal Cooling Channel

摘要：

Internal cooling is one of the effective techniques to cool turbine blades from inside. This paper experimentally investigated the effect of blowing ratio (suction ratio) in internal cooling channel. To study the effect of blowing ratio, this experimental work focuses on the effect of the enhancement of heat transfer coefficient on internal cooling channel surface by cooling air flow throughout the film cooling holes. A test facility had been built to employ the thermo chromic liquid crystal for measuring temperature and for calculating the heat transfer coefficient h. The experiment of this paper bases on steady state condition in a rectangular cooling passage. Tests are performed with single film cooling holes and with multiple film cooling holes on one of the rectangular channel surfaces. The region of maximum heat transfer enhancement occurred downstream of the cooling hole.

关键词： internal cooling thermo chromic liquid crystal blowing ratio steady state film cooling heat transfer coefficient hole area ratio

作者: May Kyu Kyu Soe Ding Shuiting

作者单位: School of Jet Propulsion Beijing University of Aeronautics and Astronautics Beijing, China

会议类型: 国际会议

会议名称: The 3rd International Symposium on Jet Propulsion and Power Engineering(第三届喷气推进与动力工程国际会议 ISJPPE)

会议地点: 南京

会议语种:英文

页码: 334-342

在线出版日期: 2010-09-13（万方平台首次上网日期，不代表论文的发表时间）