Study on Cooling Performance of “Cat Ear” Air Film Hole Based on Additive Manufacturing

doi:10.3901/JME.2024.15.334

Abstract

Abstract: Aiming at the problems of unsatisfactory cooling effect and low cooling efficiency of air film cooling, the "cat ear" air film hole based on hyperbolic curve is proposed, the structural parameters of the "cat ear" air film hole and the distribution parameters of the plate model are optimized. And the air film hole sample is prepared by metal additive manufacturing technology for experiments. The optimal structural parameters are obtained after the optimization of the air film hole parameters and the optimal distribution parameters of the plate model by experimental analysis. The injection speed of the cooling air flow is reasonably optimized and the optimal cooling efficiency of the single air film hole is 55.56% and the maximum cooling efficiency of the multi-column air film holes is 73.10%, which is 6.10% higher than the average cooling efficiency of the pores in the relevant literature. The optimal column spacing R is 15 mm. The experimental study provides important reference value and design experience for the design optimization of the air film hole of the turbine blade and the distribution parameters of the air film hole on the turbine blade.

Key words: turbine blade, air film cooling, experimental research, parameter optimization, additive manufacturing

CLC Number:

V231

ZHANG Lihao, QIAN Bo, MAO Jian, FAN Hongri, ZHANG Chaorui, LI Xupeng. Study on Cooling Performance of “Cat Ear” Air Film Hole Based on Additive Manufacturing[J]. Journal of Mechanical Engineering, 2024, 60(15): 334-345.

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