变转速旋翼直升机的续航性能与变速策略

摘要

Adjusting the rotor rotation speed reasonably along with flight states can reduce demand power and fuel consumption,thus benefit flight performance.We evaluated the effect of the variable speed ro-tor on endurance performance,and analyzed stepless speed change and step speed change.The level 1 and level 2 variable speed method were put forward.The research results indicated that optimized rota-tion speed can upgrade endurance performance obviously.Compared with the rated speed,it can reduce profile power.The level 1 variable speed method is more fit for engineering application.%根据飞行状态合理调整旋翼转速有利于降低需用功率和油耗,能够给直升机飞行性能带来好处.本文通过航程和航时的建模与分析,评估变转速旋翼对续航性能的影响.在此基础上,进行无级变速和有级变速策略研究,提出一级、二级变速方法.研究结果表明,优化转速对续航性能的提升很明显,旋翼有限级变速(一级、二级)和额定转速相比,可以显著减小其型阻功率,综合考虑,一级变速较适合于工程应用.