剪刀式尾桨涡流干扰机理和气动特性研究

朱正; 招启军; 王博

doi:10.6052/0459-1879-15-338

剪刀式尾桨涡流干扰机理和气动特性研究

doi: 10.6052/0459-1879-15-338

南京航空航天大学直升机旋翼动力学国家级重点实验室, 南京 210016

基金项目: 国家自然科学基金资助项目(11272150).

详细信息

通讯作者:
招启军,教授,博士生导师,主要研究方向:直升机空气动力学、气动声学和流动主动控制等.E-mail:zhaoqijun@nuaa.edu.cn

中图分类号: V211.3;V211.52
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- 文章访问数: 780
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- 被引次数: 0
出版历程
- 收稿日期: 2015-09-08
- 修回日期: 2016-05-31
- 刊出日期: 2016-07-18

STUDIES ON VORTEX INTERACTION MECHANISM AND AERODYNAMIC CHARACTERISTIC OF SCISSORS TAIL ROTOR

National Key Laboratory of Science and Technology on Rotorcraft Aeromechanics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

摘要

摘要: 采用非常规剪刀式尾桨对直升机整体性能有着重要影响，关于其复杂流动干扰机理的研究尚处在发展之中. 为了掌握剪刀式尾桨的流动干扰机理和参数影响规律，建立了适合于悬停状态下剪刀式尾桨干扰涡流场分析的计算流体力学(computational fluid dynamics, CFD) 数值模拟方法. 采用积分形式的Reynolds-averagedNavier-Stokes (RANS) 方程作为旋翼流场求解控制方程，围绕旋翼流场的结构网格采用嵌套网格方法生成. 在CFD 方法验证基础之上，对悬停状态下两种不同构型剪刀式尾桨桨尖涡的涡核位置和强度的演变规律进行了定量分析，并对流场中桨尖涡与桨叶的贴近干扰、碰撞、破碎运动，同时准确捕捉了不同尺度涡之间的相互干扰、融合的过程进行了分析. 进一步研究了剪刀角和轴间距参数对不同构型剪刀式尾桨气动特性的影响规律. 计算结果表明，剪刀式尾桨流场中存在复杂的桨-涡干扰和涡-涡干扰现象，剪刀角和轴间距对剪刀式尾桨的气动特性有重要影响，L 构型剪刀式尾桨气动性能整体优于U 构型剪刀式尾桨.
- 直升机 /
- 剪刀式尾桨 /
- 流场 /
- 气动特性 /
- Navier-Stokes 方程 /
- 桨尖涡
Abstract: The design of the unconventional scissors tail rotor has a powerful influence on the overall aerodynamic performance of helicopter, and the aerodynamic interaction mechanism of the unconventional tail rotor has been investigated due to its complexity. To get the interaction mechanism and aerodynamic characteristic of scissors tail rotor, a numerical method based on computational fluid dynamics (CFD) technique is established to simulate the vortex flowfield of scissors tail rotor in hover. Based on the embedded grid system, a CFD simulation method is developed by solving the compressible Reynolds-averaged Navier-Stokes (RANS) equations. Based on the validation of the CFD method, the evolution laws of position and strength of blade-tip vortex for two different scissors tail rotors are obtained by quantitative analysis in hover. Thus, close vortex-surface interactions, impingement and burst motions in the process of blade-vortex interaction are analyzed in detail, also the interaction and mergence process among the different scales vortex has been captured accurately. Furthermore, the influences of the two configuration parameters (scissors angle and vertical space) on their aerodynamic characteristics have been analyzed in hover. The simulated results demonstrate that the flowfield of the scissors tail rotor is very complicated due to various blade-vortex and vortex-vortex interaction. In addition, the configuration parameters of scissors tail rotor have important effects on its aerodynamic characteristics, and configuration L shows more advantages of improving the aerodynamic performance than configuration U has.
- helicopter /
- scissors tail rotor /
- flowfield /
- aerodynamic characteristics /
- Navier-Stokes equations /
- blade-tip vortex

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参考文献(31)

1 Amer KB, Prouty RW. Technology advances in the AH-64 advanced attack helicopter. Vertica, 1984, 8(2): 133-164

2 Sonneborn WGO, Drees JM. The scissors rotor. Journal of the American Helicopter Society, 1975, 20(3): 18-27

3 Rozhdestensky MG. Scissors rotor concept: new results obtained. American Helicopter Society 52nd Annual Forum,Washington, DC, 1996: 1231-1241

4 Sullivan BM, Edwards BD, Brentner KS, et al. A subjective test of modulated blade spacing for helicopter main rotors. Journal of the American Helicopter Society, 2005, 50 (1): 26-32

5 Xu GH, Wang SC, Zhao JG. Experimental and analytical investigation on aerodynamic characteristics of helicopter scissors tail rotor. Chinese Journal of Aeronautics, 2001, 14 (4): 193-199

6 Brentner KS, Edwards BD, Riley R. Predicted noise for a main rotor with modulated blade spacing. Journal of the American Helicopter Society, 2005, 50(1): 18-25

7 Xu GH, Zhao QJ, Peng YH. Study on the induced velocity and noise characteristics of a scissors rotor. Journal of Aircraft, 2007, 44(3): 806-811

8 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.航空学报, 2013, 34(9): 2100-2109 (Fan Feng, Shi Yongjie, Xu Guohua. Computational research on aerodynamic and aeroacoustic characteristics of scissors tail-rotor in hover. Acta Aeronautica Astronautica Sinica, 2013, 34(9): 2100-2109 (in Chinese))

9 Zhu Z, Zhao QJ. Numerical analyses for aerodynamic and noise characteristics of helicopter scissors tail rotor. American Helicopter Society 70th Annual Forum, Montreal, 2014: 1186-1198

10 Thomas PD, Middlecoff JF. Direct control of the grid point distribution in meshes generated by elliptic equations. AIAA Journal, 1980, 18(6): 652-656

11 Potsdam MA, Strawn RC. CFD simulations of tiltrotor configurations in hover. Journal of the American Helicopter Society, 2005, 50(1): 82-94

12 Song WP, Han ZH, Qiao ZD. Prediction of hovering rotor noise based on Reynolds-averaged Navier-Stokes simulation. Journal of Aircraft, 2007, 44(4): 1391-1394

13 Zhao QJ, Xu GH, Zhao JG. New hybrid method for predicting the flowfields of helicopter rotors. Journal of Aircraft, 2006, 43(2): 372-380

14 Wang B, Zhao QJ, Xu GH, et al. Numerical analysis on noise of rotor with unconventional blade-tips based on CFD/Kirchhoff method. Chinese Journal of Aeronautics, 2013, 26(3): 572-582

15 Meakin RL. A new method for establishing intergrid communication among systems of overset grids. AIAA Paper 91-1586, 1991

16 Zhao QJ, Xu GH, Zhao JG. Numerical simulations of the unsteady flowfield of helicopter rotors on moving embedded grids. Aerospace Science and Technology, 2005, 9(2): 117-124

17 Zhao QJ, Xu GH. A study on aerodynamic and acoustic characteristics of advanced tip-shape rotors. Journal of American Helicopter Society, 2007, 52(3): 201-213

18 Lomax H, Baldwin BS. Thin layer approximation and algebraic model for separated turbulent flows. AIAA Paper 78-257, 1978

19 Luo H, Baum JD, Löhner R. A fast, matrix-free implicit method for compressible flows on unstructured grids. Journal of Computational Physics, 1998, 146(2): 664-690

20 Roe PL. Approximate Riemann solvers, parameter vectors and difference schemes. Journal of Computational Physics, 1981, 43(2): 357-372

21 刘强, 刘周, 白鹏等. 低雷诺数翼型蒙皮主动振动气动特性及流场结构数值研究. 力学学报, 2015, 48(2): 269-277 (Liu Qiang, Liu Zhou, Bai Peng, et al. Numerical study about aerodynamic characteristics and flow field structures for a skin of airfoil with active oscillation at low reynolds number. Chinese Journal of Theoretical and Applied Mechanics, 2015, 48(2): 269-277 (in Chinese))

22 Van Leer B. Towards the ultimate conservative difference scheme. V. A second-order sequel to Godunov's method. Journal of Computational Physics, 1979, 32(1): 101-136

23 Harten A, Hyman JM. Self adjusting grid methods for onedimensional hyperbolic conservation laws. Journal of Computational Physics, 1983, 50(2): 235-269

24 Pomin H,Wagner S. Navier-Stokes analysis of helicopter rotor aerodynamics in hover and forward flight. Journal of Aircraft, 2002, 39(5): 813-821

25 Caradonna FX, Tung C. Experimental and analytical studies of a model helicopter rotor in hover. Vertica, 1981, 5(2): 149-161

26 张涵信, 呙超, 宗文刚. 网格与高精度差分计算问题. 力学学报, 1999, 31(4): 398-405 (Zhang Hanxin, Guo Chao, Zong Wengang. Problems about grid and high order schemes. Acta Mechanica Sinica, 1999, 31(4): 398-405 (in Chinese))

27 Yu YH. Rotor blade-vortex interaction noise. Progress in Aerospace Sciences, 2000, 36(2): 97-115

28 Lakshminarayan VK, Baeder JD. High-resolution computational investigation of trimmed coaxial rotor aerodynamics in hover. Journal of the American Helicopter Society, 2009, 54(4): 42008

29 Lakshminarayan VK, Baeder JD. Computational investigation of micro-scale coaxial rotor aerodynamics in hover. Journal of Aircraft, 2010, 47(3): 940-955

30 Tauszig L, Gandhi F. Influence of blade-to-blade dissimilarity on alleviation of helicopter blade-vortex interactions. Mathematical and Computer Modelling, 2001, 33(10): 1139-1154

31 朱正, 招启军, 李鹏. 悬停状态共轴刚性双旋翼非定常流动干扰机理. 航空学报, 2016, 37(2): 568-578 (Zhu Zheng, Zhao Qijun, Li Peng. Investigations on unsteady flow interaction mechanism of coaxial rigid rotors in hover. Acta Aeronautica et Astronautica Sinica, 2016, 37(2): 568-578 (in Chinese))

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