Study on film cooling performance of fan-shaped hole with downstream cylindrical jet

摘要：

This paper presents detailed computation and comparison in terms of film cooling adiabatic effectiveness, heat transfer coefficient, and Net Heat Flux Reduction (NHFR) for three film cooling hole geometries. The hole geometries investigated include a cylindrical hole and a fan-shaped hole with and without an assistant cylindrical jet. The computational domain geometry and flow conditions were chosen in a way to match data reported in the open literature. As compared to the cylindrical hole, fan-shaped hole with and without an assistant cylindrical jet provide improved protection of the surface over a wide range downstream film cooling hole and a better lateral spreading of the coolant, which leads to higher average film cooling performance, particularly at high blowing ratios. The presence of cylindrical hole downstream of fan-shaped hole somewhat increases adiabatic effectiveness and NHFR over a wide range of stream wise location. The blowing ratio has slightly effect on the film cooling performance for fan-shaped hole with and without assistant hole.

关键词： fan-shaped film cooling effectiveness heat transfer coefficient

作者: Liu Xiaohong Luo Xiang Tao Zhi

作者单位: School of Jet Propulsion Beijing University of Aeronautics and Astronautics, BUAA 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: 315-320

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）