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BLADE PLANFORM OPTIMIZATION FOR HSI NOISE REDUCTION OF HELICOPTER  

Chae, Sang-Hyun (부산대학교 항공우주공학과 대학원)
Yang, Choong-Mo (일본항공우주연구개발기구 수치해석그룹)
Jung, Shin-Kyu (일본동북대학교 유체과학연구소)
Aoyama, Takashi (일본항공우주연구개발기구 수치해석그룹)
Obayashi, Shigeru (일본동북대학교 유체과학연구소)
Yee, Kwang-Jung (부산대학교 항공우주공학과)
Publication Information
Journal of computational fluids engineering / v.14, no.1, 2009 , pp. 53-61 More about this Journal
Abstract
The objective of this research is to design blade planform to reduce high speed impulsive(HSI) noise from a non-lifting helicopter rotor using CFD method and optimization techniques. As for the aero-acoustic analysis, CFD technique for aerodynamic analysis and Kirchhoff's method for the acoustic analysis were used. As for the optimization method, Kriging-based genetic algorithm(GA) model as a high-fidelity optimization method was chosen. Design variables and constraints are determined for arbitrary blade planform. The result shows that the optimized blade planform with high swept-back and taper ratio can reduce HSI noise by suppressing generation of the strong shock wave on blade surface and propagation of the noise to the farfield flow region.
Keywords
High Speed Impulsive Noise; Kriging Model; Genetic Algorithm; Kirchhoff's Method; Optimization Design;
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