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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。
The influence of the parameters on the course control system of the tail rotor-free helicopter is analyzed. At present, the modeling of the whole course control system is very difficult to study with few achievements. Most studies focus on one of the components, the annular control tail beam, and can not consider the interaction rules and the overall characteristics of the components. A three-dimensional CFD calculation model including rotor and course control system was established. After verifying the correctness of the model, the influence of parameters was calculated and analyzed. Breaking through the traditional two-dimensional modeling, only the method of analyzing the characteristics of the tail boom’s cross section only focuses on the momentum coefficient. Based on the advantages of the three-dimensional modeling, the comprehensive influence among the components is considered. The effects of tail boom length, jet nozzle area, fan pressurization and slot shape on the stability of the fuselage heading are analyzed. Some influencing rules of the parameters are obtained, which provide the basis and references for the subsequent design and research.