| Citation: | LI Zhibin, YANG Yongfei, SUN Wei, et al. Computation on aeroacoustic characteristics of scissors tail-rotor in forward flight[J]. Journal of Aerospace Power, 2022, 37（12）：2691-2706 doi: 10.13224/j.cnki.jasp.20210713
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A flow field calculation model for scissors tail-rotor was established based on the computational fluid dynamics (CFD). The nested grid method was used to simulate the blade motion, and the dual-time method was used for time propulsion. A high-efficiency trim strategy based on the “delta method” was adopted to trim the collective pitch for the scissors tail-rotor. On the basis, the aeroacoustic characteristics of the scissors tail-rotor were calculated by using Ffowcs Williams-Hawkings (FW-H) equation. This method was applied to the calculation of scissors tail-rotor (L configuration and U configuration) in different forward velocities. The effects of the scissors angle and vertical space on the aerodynamic force and noise of scissors tail-rotor were compared and analyzed. It was found that the scissors angle had an important effect on aerodynamic force and noise characteristics of the scissor tail rotor, while the vertical space had little effect on the tail rotor within a reasonable range. Compared with the conventional tail rotor, the noise directivity of the scissor tail rotor changed little in forward flight, but the noise amplitude changed significantly.
| [1] |
LEVERTON J W,POLLARD J S,WILLS C R. Main rotor wake-tail rotor interaction[J]. Vertica,1977,1(3): 213-221.
|
| [2] |
MENGER R P, WOOD T L, BEIEGER J T. Effects of aerodynamic interaction between mian and tail rotors on helicopter hover performance and noise[R]. NASA CR-1983-166477, 1983.
|
| [3] |
ROGER M,KUCUKCOSKUN K. Near-and-far field modeling of advanced tail-rotor noise using source-mode expansions[J]. Journal of Sound and Vibration,2019,453(1): 328-354.
|
| [4] |
SONNEBORN W G O,DREES J M. The scissors rotor[J]. Journal of the American Helicopter Society,1975,20(3): 18-27. doi: 10.4050/JAHS.20.18
|
| [5] |
EDWARDS B D. Psychoacoustic testing of modulated blade spacing for main rotor[R]. NASA CR-2002-211651, 2002.
|
| [6] |
SULLIVAN B M,EDWARDS B D,BRENTNER K S,et al. A subjective test of modulated blade spacing for helicopter main rotors[J]. Journal of the American Helicopter Society,2005,50(1): 26-32. doi: 10.4050/1.3092840
|
| [7] |
ROZHDESTVENSKY M G. Scissors rotor concept: new results obtained[C]//Proceedings of American Helicopter Society 52nd Annual Forum. Washington DC: American Helicopter Society, 1996: 1231-1241.
|
| [8] |
XU Guohua,WANG Shicun,ZHAO Qijun. Experimental and analytical investigation on aerodynamic characteristics of helicopter scissors tail rotor[J]. Chinese Journal of Aeronautics,2001,14(4): 193-199.
|
| [9] |
XU Guohua,ZHAO Qijun,PENG Yanhui. Study on the induced velocity and noise characteristics of a scissors rotor[J]. Journal of Aircraft,2007,44(3): 806-811. doi: 10.2514/1.24460
|
| [10] |
樊枫,史勇杰,徐国华. 剪刀式尾桨悬停状态气动力及噪声特性计算研究[J]. 航空学报,2013,34(9): 2100-2109. FAN Feng,SHI Yongjie,XU Guohua. Computational research on aerodynamic and aeroacoustic character of scissors tail-rotor in hover[J]. Acta Aeronauytica et Astronautica Sinca,2013,34(9): 2100-2109. (in Chinese
|
| [11] |
FAN Feng,XU Guohua,SHI Yongjie,et al. Numerical calculations of aerodynamic and acoustic characteristics for scissored tail-rotors in forward flight[J]. Transactions of Nanjing University of Aeronautics,2016,33(3): 285-293.
|
| [12] |
陈丝雨,招启军,范俊,等. 悬停状态剪刀式尾桨气动/噪声特性优化分析[J]. 航空动力学报,2019,34(5): 1050-1060. CHEN Siyu,ZHAO Qijun,FAN Jun,et al. Optimization analysis for aerodynamic noise characteristics of scissors tail rotor in hover[J]. Journal of Aerospace Power,2019,34(5): 1050-1060. (in Chinese
|
| [13] |
樊枫. 直升机非定常干扰流场与声场的计算方法研究与应用[D]. 南京: 南京航空航天大学, 2013.
FAN Feng. Research and application of computational methods for unsteady flow filed and sound field of helicopter[D]. Nanjing: Nanjing University of Aeronautics and Astronautics, 2013. (in Chinese)
|
| [14] |
ROE P L. Approximate riemann solvers, parameter vectors, and difference schemes[J]. Journal of Computational Physics,1981,43(2): 357-372. doi: 10.1016/0021-9991(81)90128-5
|
| [15] |
吴琪,招启军,林永峰,等. 旋翼跨音速非定常黏性绕流的高效CFD模拟方法[J]. 南京航空航天大学学报,2015,47(2): 212-219. WU Qi,ZHAO Qijun,LIN Yongfeng,et al. Highly-efficient CFD method for predicting unsteady transonic viscous flow around rotor[J]. Journal of Nanjing University of Aeronautics and Astronautics,2015,47(2): 212-219. (in Chinese
|
| [16] |
FARASSAT F. Linear acoustic formulas for calculation of rotating blade noise[J]. AIAA Journal,1981,19(9): 1122-1130. doi: 10.2514/3.60051
|
| [17] |
江露生,曹亚雄,刘婷,等. 共轴刚性旋翼悬停状态桨叶表面压力测量试验与计算研究[J]. 北京航空航天大学学报,2021,47(12): 2484-2493. JIANG Lusheng,CAO Yaxiong,LIU Ting,et al. Experimental and computional study on blade surface pressure measurement of coaxial rigid rotor in hovering state[J]. Journal of Beijing University of Aeronautics and Astronautics,2021,47(12): 2484-2493. (in Chinese doi: 10.13700/j.bh.1001-5965.2020.0669
|
| [18] |
吴希明,祁浩天,马率,等. 共轴刚性旋翼气动干扰数值计算方法[J]. 南京航空航天大学学报,2019,51(2): 147-153. WU Ximing,QI Haotian,MA Shuai,et al. Numerical method of coaxial rigid rotor aerodynamic interaction[J]. Journal of Nanjing University of Aeronautics and Astronautics,2019,51(2): 147-153. (in Chinese
|
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