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http://dx.doi.org/10.5139/JKSAS.2009.37.3.215

Unsteady Aerodynamic Analysis for Helicopter Rotor in Hovering and Forward Flight Using Overlapped Grid  

Im, Dong-Kyun (한국과학기술원 항공우주공학과 대학원)
Wie, Seong-Yong (한국과학기술원 항공우주공학과 대학원)
Kim, Eu-Gene (한국과학기술원 항공우주공학과 대학원)
Kwon, Jang-Hyuk (한국과학기술원 항공우주공학과)
Lee, Duck-Joo (한국과학기술원 항공우주공학과)
Park, Soo-Hyung (건국대학교 항공우주정보시스템공학과)
Chung, Ki-Hoon (한국항공우주연구원)
Kim, Seung-Bum (한국항공우주연구원)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.37, no.3, 2009 , pp. 215-223 More about this Journal
Abstract
In this paper, the helicopter aerodynamics is simulated in hovering and forward flight. Also, an overlapped grid technique is applied in this simulation to consider the blade motion and moving effects. The Caradonna & Tung's rotor blade was selected to analyze the unsteady aerodynamics in hovering and non-lift forward flight. Also, the AH-1G rotor blade was selected in forward flight. In forward flight case, the numerical trim was applied to determine the cyclic pitching angles using Newton-Raphson method, and the numerical results were in good agreement with experimental data, especially, the BVI effects were well simulated in advancing side in comparison other numerical results. The governing equation is a three dimensional unsteady Euler equation, and the Riemann invariants condition is used for inflow and outflow at the boundary.
Keywords
Overlapped grid; Hovering rotor; Forward Flight;
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Times Cited By KSCI : 1  (Citation Analysis)
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