Aerothermal Performance of Shroudless Turbine Blade Tips with Relative Casing Movement Effects
Authors:
- A. S. VirdiAVA. S. Virdi
- Q. ZhangQZQ. Zhang
- L. HeLHL. He
- H. D. LiHLH. D. Li
- R. HunsleyRHR. Hunsley
- 1 March 2015
- journal article
- research article
- Published by American Institute of Aeronautics and Astronautics (AIAA) in Journal of Propulsion and Power
- Vol. 31 (2) , 527-536
Abstract
Qualitatively different heat transfer characteristics between a transonic blade tip and a subsonic one have recently been discovered. High-resolution experimental data can be acquired for blade-tip heat transfer research using a high-speed linear cascade. A combined experimental and computational fluid dynamics study on several high-pressure turbine blade-tip configurations is conducted to understand the flow physics in both stationary and moving casing setups. Extensive tests measuring aerodynamic loss and heat transfer have been performed on a stationary squealer tip at engine-representative aerodynamic conditions. A systematic validation of the computational fluid dynamics solver (Rolls–Royce, plc. HYDRA code) is introduced, showing good agreement with the experimental data obtained. Relative casing movement effects are then evaluated for two tip configurations at three different tip gaps. The moving casing is shown to affect the aerothermal performance considerably; the trends are consistently capture...Keywords
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