Session: 12-02 Film Cooled Rotor Blades

Paper Number: 83169

83169 - Interaction Mechanism of Transonic Squealer Tip Cooling With the Effect of High-Speed Relative Casing Motion 

It has been well proved that the relative casing motion can significantly influence the flow characteristics at near tip region and lead to totally different aerothermal performance comparing to stationary condition. With the film cooling holes installed on the tip, the flow condition will be more complex. It can be expected that the film cooling effectiveness can also be changed by relative casing motion. In this study, experimental investigation was conducted for four different cooling configurations. With a novel high-speed disk rotor which is used to mimic the high speed relative casing motion, spatially resolved tip heat transfer data including heat transfer coefficient and film cooling effectiveness were obtained by infrared thermal measurement. Compare to other existing experimental facilities, the facility used in this experiment not only can provide engine realistic Mach number, Reynolds number and relative casing speed but also has full optical access to tip region. Heat transfer data obtained for four different cooling configurations with different relative casing speed were compared. The relative motion will strength the cooling effectiveness at frontal part region but will have slight influence near trailing edge. The configuration has both pressure side holes and gap holes has the largest cooling effectiveness increasement when relative motion applied. To further detailed analysis the flow physics, coupled RANS CFD were conducted with ANSYS CFX employed.

Presenting Author: Wenbo Xie Shanghai Jiao Tong University

Presenting Author Biography: Master degree candidate of Shanghai Jiao Tong University

Authors:

Wenbo Xie Shanghai Jiao Tong University
Hongmei Jiang Shanghai Jiao Tong University
Shaopeng Lu Shanghai Jiao Tong University
Xu Peng Shanghai Jiao Tong University
Qiang Zhang Shanghai Jiao Tong University