A new method for predicting rotor wake geometries and downwash velocity field

被引：7

作者：

Cao, YH ^{[1
]}

机构：

[1] Beijing Univ Aeronaut & Astronaut, Inst Aircraft Design, Beijing 100083, Peoples R China

来源：

AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY | 1999年 / 71卷 / 02期

关键词：

aerodynamics; flight; helicopters; rotors; vortex wake;

D O I：

10.1108/00022669910261574

中图分类号：

V [航空、航天];

学科分类号：

08 [工学]; 0825 [航空宇航科学与技术];

摘要：

A new method for predicting rotor wake in low speed and hovering flight is described to investigate the motion of the helical tip vortex. Beginning with the generalized wake model, a semi-empirical correction for the vortex core effect on rotor wake is made and free wake calculation is carried out. As an example of its engineering application, the calculated downwash velocity field along the rocket launch line is presented and simply analysed. In terms of theory, the method developed here may provide a referable basis for further study of the formation mode of the tip vortex and vortex core interior structure.

引用

页码：129 / 135

页数：7