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http://dx.doi.org/10.5139/JKSAS.2005.33.1.001

Aerodynamic Shape Optimization of Helicopter Rotor Blades in Hover Using a Continuous Adjoint Method on Unstructured Meshes  

Lee, S.-W. (한국과학기술원 항공우주공학과 대학원)
Kwon, O.-J. (한국과학기술원 항공우주공학과)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.33, no.1, 2005 , pp. 1-10 More about this Journal
Abstract
An aerodynamic shape optimization technique has been developed for helicopter rotor blades in hover based on a continuous adjoint method on unstructured meshes. The Euler flow solver and the continuous adjoint sensitivity analysis were formulated on the rotating frame of reference for hovering rotor blades. In order to handle the repeated evaluation of the design cycle efficiently, the flow and adjoint solvers were parallelized using a domain decomposition strategy. A solution-adaptive mesh refinement technique was adopted for the accurate capturing of the tip vortex. Applications were made for the aerodynamic shape optimization of Caradonna-Tung rotor blades and UH60 rotor blades in hover. The results showed that the present method is an effective tool to determine optimum aerodynamic shapes of rotor blades requiring less torque while maintaining the desired thrust level.
Keywords
Helicopter Rotor Blade; Adjoint Method; Design Optimization; Unstructured Mesh; Sensitivity Derivatives; Euler Equations; Mesh Adaptation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 Oyama, A., Liou, M. S., and Obayashi, S., 'Transonic Axial-Flow Blade Shape Optimization Using Evolutionary Algorithm and Three-Dimensional Navier-Stokes Solver', AIAA 2002-5642, 2002
2 이상욱, 권오준, '비정렬 격자계에서 continuous adjoint 방정식을 이용한 공력 형상 최적설계', 한국항공우주학회지, Vol. 30, No. 4, 2002, pp. 18-27
3 Lee, S. W., and Kwon, O. J., 'Parallel 3-D Aerodynamic Shape Optimization on Unstructured Meshes', KSAS International Journal, Vol. 4, No. 1, 2003, pp. 45-52
4 Reuther, J. J., Jameson, A., Alonso, J. J., Rimlinger, M. J., and Saunders, D., 'Constrained Multipoint Aerodynamic Shape Optimization Using an Adjoint Formulation and Parallel Computers, Part 1, 2', Journal of Aircraft, Vol. 36, No. 1, 1999, pp. 61-74   DOI   ScienceOn
5 Fanjoy, D. W., and Crossly, W. A., 'Aerodynamic Shape Design for Rotor Airfoils via Genetic Algorithm', American Helicopter Society 53rd Annual Forum, 1997
6 Yeo, H. S., and Johnson, W., 'Assessment of Comprehensive Analysis Calculation of Airloads on Helicopter Rotors', AHS 4th Decennial Specialists's Conference on Aeromechanics,' 2004
7 Srinivasan, G. R., Raghavan, V., and Duque, E. P. N., 'Flowfield Analysis of Modern Helicopter Rotors in Hover by Navier-Stokes Method', Journal of the American Helicopter Society, Vol. 38, No. 3, 1993, pp. 3-13   DOI
8 Nadarajah, S. K., 'The Discrete Adjoint Approach to Aerodynamic Shape Optimization', Ph. D. Thesis, Stanford Univ., 2003
9 Sun, H., Kim, Y., Lee, S., and Lee, D., 'Aerodynamic Design of Helicopter Rotor Blade in Forward Flight Using Response Surface Methodology', American Helicopter Society 58th Annual Forum, 2002
10 Tapia, F., Sankar, L. N., and Schage, D. P., 'An Inverse Aerodynamic Design Method for Rotor Blades', Journal of the American Helicopter Society, Vol. 42, No. 4, 1997, pp. 321-316   DOI
11 Kang, H. J., and Kwon, O. J., 'Effect of Wake Adaptation on Rotor Hover Simulations Using Unstructured Meshes', Journal of Aircraft, Vol. 38, No. 5, 2001, pp. 868-877   DOI   ScienceOn
12 Caradonna, F. X., and Tung, C., 'Experimental and Analytical Studies of a Model Helicopter Rotor in Hover', NASA TM 81232, 1981
13 Ahmad, J. U., and Strawn, R. C., 'Hovering Rotor and Wake Calculations with an Overset-Grid Navier-Stokes Solver', $55^{th}$ AHS Annual Forum, 1999