无尾桨直升机航向操纵系统参数影响分析

Parameter Analysis on Yaw Control System of Tail Boom of a NOTOR

针对无尾桨直升机的航向操纵系统进行参数影响分析。目前针对整个航向操纵系统的建模研究难度很大,成果很少,多数研究集中于其中的一个部件-环量控制尾梁,分析时无法考虑部件间的相互影响规律与整体特性。建立了包括旋翼和航向操纵系统的三维CFD计算模型,在验证模型正确性后,对其参数影响进行了计算与分析。突破传统二维建模只分析尾梁截面特性只关注动量系数的方法,基于三维建模优势,考虑部件间的综合影响。开展了尾梁长度、喷气舵喷口面积、风扇增压与狭缝形状等参数对机身航向稳定性的影响分析,得到了一些参数影响规律,为后续设计和研究提供了依据和参考。

This paper focused on parameter analysis on a yaw control system of a no tail helicopter （NOTAR）. The domestic and foreign research almost concentrated on aerodynamic experiment and two- dimensional modeling on one part of the component, which is the circulation controlled tail boom till now. While it is difficult, few study took the whole yaw control system into account and modeling, thus the whole aerodynamic influence and effect between parts could not be considered. The traditional method set two - dimensional model and only paid attention on a section of tail boom and momentum coefficient. Instead of that, this paper established a three - dimensional CFD model including rotor and yaw control system, took advantage of the model to consider influence between parts and focused on parameter analysis based on verified model. Influence of parameters including length of tail boom, nozzle area of thrust, fan compressor, and shape of slots were concerned in the paper. Finally, got parameter influence and offer conference for further design and research.