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Optimization design method for rotor blade-tip shape with low HSI noise characteristics
Received date: 2014-06-05
Revised date: 2014-09-02
Online published: 2014-09-17
Supported by
National Natural Science Foundation of China (11272150); Project Funded by the Priority Academic Development of Jiangsu Higher Education Institutions
Based on computational fluid dynamics (CFD)/FW-H_pds methods (Ffowcs Williams-Hawkings equations with penetrable data surface) and hybrid optimization technique, an optimization design procedure for rotor planform with low HSI noise characteristics is established. In this solver, based on the moving-embedded grid methodology, a CFD simulation method for the aerodynamic characteristics of rotor is developed by solving the compressible Reynolds-averaged Navier-Stokes (RANS) equations. During the optimization process, the high-qualified blade grids are generated by a high-efficient parameterized method. Additionally, the high-speed impulsive (HSI) noise characteristics generated by transonic helicopter rotor are analyzed through a robust prediction method based on FW-H_pds equations. Aimed at the minimization of the absolute sound pressure peak value, optimization analyses based on the rotor blade with double-swept and tapered tip have been accomplished with the aerodynamic performance in hover as constraints. The genetic algorithm and surrogated model based on Latin hypercube sampling (LHS) design and radial basis function (RBF) are combined as a hybrid optimization technique. Compared with rectangular blades, it shows that the minimum acoustics pressure of rotor with optimized blade-tip shape is decreased by 58.4% at the present calculating condition. For the rotor with optimized blade-tip, the HSI noise level can be reduced effectively due to its weaker transonic "delocalization" phenomenon in the region of blade-tip and the blade-tip vortex strength is decreased by 30% which results in the improvement of the FM about 2%-3%.
ZHU Zheng , ZHAO Qijun . Optimization design method for rotor blade-tip shape with low HSI noise characteristics[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015 , 36(5) : 1442 -1452 . DOI: 10.7527/S1000-6893.2014.0208
[1] Leishman J G. Principles of helicopter aerodynamics[M]. Cambridge: Cambridge University Press, 2000: 502-517.
[2] Boxwell D A, Yu Y H, Schmitz F H. Hovering impulsive noise-some measured and calculated results[J]. Vertica, 1979, 3(1): 35-45.
[3] Yang C, Aoyama T, Chae S. Blade planform optimization to reduce HSI noise of helicopter in hover[C]//Proceedings of the 64th Annual Forum of the American Helicopter Society. Montreal: American Helicopter Society, 2008: 2218-2232.
[4] Johnson C S, Barakos G N. Optimizing rotor blades with approximate british experimental rotor programme tips[J]. Journal of Aircraft, 2014, 51(2): 447-463.
[5] Wang B, Zhao Q J, Zhao G Q. Investigations on aerodynamic characteristics of rotor with improved CLOR blade-tip by experimental and numerical method[J]. Acta Aeronautica et Astronautica Sinica, 2012, 33(1): 1-10 (in Chinese). 王博, 招启军, 赵国庆. 改进型CLOR桨尖旋翼气动特性试验研究及数值分析[J]. 航空学报, 2012, 33(1): 1-10.
[6] Song W P, Han Z H, Wang L Q. The effect of blade-tip shape on rotor aeroacoustic noise by Euler/Kirchhoff method[J]. Chinese Journal of Computational Physics, 2001, 18(6): 569-572 (in Chinese). 宋文萍, 韩忠华, 王立群. 旋翼桨尖几何形状对旋翼气动噪声影响的定量计算分析[J]. 计算物理, 2001, 18(6): 569-572.
[7] Zhao Q J, Xu G H. A study on aerodynamic and acoustic characteristics of advanced tip-shape rotors[J]. Journal of the American Helicopter Society, 2007, 52(3): 201-213.
[8] Guo W L, Song W P, Xu J H. An effective aerodynamics/acoustic optimization of blade tip planform for helicopter rotors[J]. Journal of Northwestern Polytechnical University, 2012, 30(1): 73-79 (in Chinese). 郭旺柳, 宋文萍, 许建华. 旋翼桨尖气动/降噪综合优化设计研究[J]. 西北工业大学学报, 2012, 30(1): 73-79.
[9] Quackenbush T R, Wachspress D A, Kaufman A E. Optimization of rotor performance in hover using a free wake analysis[J]. Journal of Aircraft, 1991, 28(3): 200-207.
[10] Sun W, Zhang C L. Multi-objective optimization for aerodynamic shape of helicopter blade[J]. Journal of Aerospace Power, 2011, 26(7): 1608-1614 (in Chinese). 孙伟, 张呈林. 直升机桨叶气动外形多目标优化设计[J]. 航空动力学报, 2011, 26(7): 1608-1614.
[11] Le Pape A, Beaumier P. Numerical optimization of helicopter rotor aerodynamic performance in hover[J]. Aerospace Science and Technology, 2005, 9(3): 191-201.
[12] Dumont A, Le Pape A, Peter J. Aerodynamic shape optimization of hovering rotors using a discrete adjoint of the Reynolds-averaged Navier-Stokes equations[J]. Journal of the American Helicopter Society, 2011, 56(3): 1-11.
[13] Wang B, Zhao Q J, Xu G H. Numerical optimization of helicopter rotor twist distribution in hover[J]. Acta Aeronautica et Astronautica Sinica, 2012, 33(7): 1163-1172 (in Chinese). 王博, 招启军, 徐国华. 悬停状态直升机桨叶扭转分布的优化数值研究[J]. 航空学报, 2012, 33(7): 1163-1172.
[14] Zhao Q J, Xu G H, Zhao J G. New hybrid method for predicting the flowfields of helicopter rotors[J]. Journal of Aircraft, 2006, 43(2): 372-380.
[15] Brentner K S, Farassat F. Analytical comparison of the acoustic analogy and Kirchhoff formulation for moving surfaces[J]. AIAA Journal, 1998, 36(8): 1379-1386.
[16] Di Francescantonio P. A new boundary integral formulation for the prediction of sound radiation[J]. Journal of Sound and Vibration, 1997, 202(4): 491-509.
[17] Brentner K S, Farassat F. Analytical comparison of the acoustic analogy and Kirchhoff formulation for moving surfaces[J]. AIAA Journal, 1998, 36(8): 1379-1386.
[18] Queipo N V, Haftka R T, Shyy W. Surrogate-based analysis and optimization[J]. Progress in Aerospace Sciences, 2005, 41(1): 1-28.
[19] Pomin H, Wagner S. Navier-Stokes analysis of helicopter rotor aerodynamics in hover and forward flight[J]. Journal of Aircraft, 2002, 39(5): 813-821.
[20] Baeder J D, Gallman J M, Yu Y H. A computational study of the aeroacoustics of rotors in hover[J]. Journal of the American Helicopter Society, 1997, 42(1): 39-53.
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