直升机旋翼机身发动机耦合流场数值模拟

Numerical simulation of helicopter rotor-fuselage-engine aerodynamic interactions

School of Aeronautical Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要: 运用计算流体力学(CFD)数值工具研究旋翼机身发动机空气动力干扰.通过生成多块贴体网格,运用有限体积方法直接求解了不可压N-S方程.分析了某直升机低速前飞时的流场性质.首先对孤立机身周围粘性流场进行数值模拟,然后运用作用盘模型分析了旋翼机身空气动力干扰对机身压力分布等方面的影响;最后运用简单的发动机模型分析了发动机进出口对直升机流场的影响.
- 数值模拟 /
- 旋翼机身 /
- 作用盘 /
- 发动机进出口 /
- 前飞
Abstract: The rotor-fuselage-engine aerodynamic interactions were studied using computational fluid dynamics numerical tools.The body-fitted structural grid was generated through multi-block grid technique.The finite volume method was adopted and incompressible Navier-Stokes equation was solved.The flow field and performance of the helicopter in forward flight were analyzed.Firstly,the accuracy of viscous simulation was investigated for the isolated fuselage configuration.Then,the rotor-fuselage aerodynamic interactions using the actuator disk model were obtained by discussing the influence of rotor on fuselage pressure distribution.Finally,the effect of the helicopter engine inlet and outlet was analyzed using a simplified engine model and the rotor-fuselage-engine interactions were obtained.
- numerical simulation /
- rotor-fuselage-engine /
- actuator disk /
- engine inlet and outlet /
- forward flight

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