Blade planform optimization to reduce HSI noise of helicopter in hover

Choongmo Yang, Takashi Aoyama, Sanghyun Chae, Kwanjung Yee, Shinkyu Jeong, Shigeru Obayashi

Research output: Contribution to journalConference articlepeer-review

20 Citations (Scopus)


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 aerodynamic part, CFD calculation is conducted to solve three dimensional unsteady Euler equations. As for the optimization method, sequential quadratic programming as a gradient optimization method and Kriging-based GA model as a non-gradient optimization method are used according to the different problem definition. Based on our previous research, objective functions, design variables and constraints are determined for arbitrary blade planform during optimization process. The result shows that the optimized blade planform can reduce HSI noise by supressing the strong shock wave from being generated on blade surface and being propagated to farfield flow region.

Original languageEnglish
Pages (from-to)2218-2232
Number of pages15
JournalAnnual Forum Proceedings - AHS International
Publication statusPublished - 2008
Event64th Annual Forum - AHS International - Montreal, Canada
Duration: 2008 Apr 292008 May 1


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