Numerical Comparison of the Cooling Performance of a Shaped Hole Configuration and a Nekomimi Configuration
The improvement of the thermal efficiency of modern gas turbines can be achieved by reducing the required cooling air amount. Therefore, it is necessary to increase the cooling effectiveness, so that the available cooling air fulfils the cooling task even if the amount has been reduced. Due to experimental and numerical efforts, it is well understood today that aerodynamic mixing processes are enhanced by counter rotating vortices (CRV) in the cooling jets and lead to jet lift-off effects. Novel film cooling technologies focus on establishing anti-counterrotating-vortices (ACRV) inside the cooling jet that prevent the hot gas from flowing underneath the jet and, thus, avoid the lift-off effect. One of these technologies is the NEKOMIMI film cooling, which is derived from the original double-jet film cooling (DJPC).
double-jet ejection film cooling blowing ratio jet interaction phenomena film cooling effectiveness
Karsten Kusterer Nurettin Tfekin Dieter Bohn Takao Sugimoto Ryozo Tanaka Masahide Kazari
B&B-AGEMA GmbH, Jiilicher Strasse 338, D-52070Aachen, Germany,D-52056 Aachen, Germany Institute of steam and Gas Turbines , RWTH Aachen University, Templergraben 55, D-52056 Aachen, Germ Kawasaki Heavy Industries, LTD. Gas Turbine &- Machinery Company, Akashi, 673-8666 Japan Kawasaki Heavy Industries, LTD. Technical Institute, Akashi, 673-8666 Japan
国际会议
4th International Symposium on Jet Propulsion and Power Engineering(第四届喷气推进与动力工程国际会议 ISJPPE2012)
西安
英文
308-316
2012-09-10（万方平台首次上网日期，不代表论文的发表时间）