基于CFD方法的直升机旋翼/尾桨非定常气动干扰计算

樊枫; 徐国华; 史勇杰

doi:10.13224/j.cnki.jasp.2014.11.013

基于CFD方法的直升机旋翼/尾桨非定常气动干扰计算

doi: 10.13224/j.cnki.jasp.2014.11.013

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(11302103)

航空科学基金(20135752055)

详细信息

作者简介:
樊枫(1987-),男,江西景德镇人,博士生,主要从事旋翼CFD和气动噪声研究.

中图分类号: V211.3
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- 被引次数: 0
出版历程
- 收稿日期: 2013-07-08
- 刊出日期: 2014-11-28

Calculations of unsteady aerodynamic interaction between main-rotor and tail-rotor of helicopters based on CFD method

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CFD方法针对直升机旋翼/尾桨气动干扰问题进行了数值计算研究.建立了一个适用于旋翼/尾桨干扰气动力计算的方法.在该方法中,控制方程采用三维非定常雷诺平均Navier-Stokes(RANS)方程,网格系统使用嵌套网格技术以计及旋翼和尾桨的相对运动.基于所建立的方法,分别计算研究了悬停状态、低速前飞状态以及巡航平飞状态时干扰状态的旋翼和尾桨气动力,并深入分析了尾桨旋转方向对干扰特性的影响.计算结果表明:旋翼对尾桨的气动干扰在各计算状态都存在,且干扰影响不总是负面的,这取决于飞行状态;而尾桨对旋翼的干扰作用则在悬停状态时较为明显,但在前飞状态时可忽略不计;尾桨旋转方向对尾桨气动力的影响较大,合理地选择尾桨的旋转方向可以改善其气动特性.
- 旋翼 /
- 尾桨 /
- 气动干扰 /
- 非定常载荷 /
- 直升机
Abstract: Numerical calculation research was performed for helicopter main-rotor/tail-rotor interaction by using the CFD method. A computational method was established for aerodynamic interactions of main-rotor/tail-rotor configuration, wherein the three-dimensional unsteady Reynolds-averaged Navier-Stokes (RANS) equations were used as the control equations, and overset grid technique was employed to simulate the relative motion between the main-rotor and tail-rotor. Based on the developed method, the aerodynamic characteristics of main-rotor/tail rotor interaction in hover, low-speed forward flight and cruising state were calculated, and the influence of the tail-rotor rotation direction on the interaction characteristics was analyzed. The results indicate that the interference influence of main-rotor on tail-rotor is obvious in all calculation states, but not always negative, depending on the flight condition. The interference influence of tail-rotor on main-rotor is relatively obvious in hover, but negligible in forward flight condition. In addition, the tail-rotor rotation direction has a significant effect on the aerodynamic force of tail-rotor, so reasonable selection of the tail-rotor rotation direction can improve the aerodynamics of tail-rotor.
- main-rotor /
- tail-rotor /
- aerodynamic interaction /
- unsteady airloads /
- helicopter

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参考文献(18)

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