摘要
通过考察旋翼洗流对发动机喷流的影响来研究直升机发动机喷流的流动形式 .首先应用自由尾流分析技术来计算旋翼尾迹和发动机绕排流空间的洗流速度 .然后计算发动机的喷流轨迹 ,喷流截面形状和喷流物理参量 。
An analytical method to predict the effects of rotor downwash on engine jet was proposed to investigate the flow pattern of helicopter engine jet using generalized wake equation. First, free wake analysis was carried out to calculate the rotor wake geometry and the downwash around the engine jet space. Then engine jet path, cross section shape and physical variants were calculated and analysed. Finally, an example was given to show that the method can be used to predict the temperature at the core of a jet and the temperature distribution in various jet section of a helicopter.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2001年第3期297-300,共4页
Journal of Beijing University of Aeronautics and Astronautics
