A coupled CFD and wake model simulation of helicopter rotor in hover

3rd International Conference on Energy Equipment Science and Engineering

Zhao, Qinghe^1 ; Li, Xiaodong^1

School of Energy and Power Engineering, Beihang University, Beijing

100083, China^1

关键词: Coupling modeling;    Flow field structure;    Helicopter rotor in hovers;    Hybrid method;    Numerical dissipation;    Prescribed wake;    Surface pressure distribution;    Vortex structures;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/128/1/012116/pdf
DOI  :  10.1088/1755-1315/128/1/012116

来源: IOP

【 摘 要 】

The helicopter rotor wake plays a dominant role since it affects the flow field structure. It is very difficult to predict accurately of the flow-field. The numerical dissipation is so excessive that it eliminates the vortex structure. A hybrid method of CFD and prescribed wake model was constructed by applying the prescribed wake model as much as possible. The wake vortices were described as a single blade tip vortex in this study. The coupling model is used to simulate the flow field. Both non-lifting and lifting cases have been calculated with subcritical and supercritical tip Mach numbers. Surface pressure distributions are presented and compared with experimental data. The calculated results agree well with the experimental data.