基于CFD的对转桨扇发动机性能确定技术研究  

Numerical Simulation of Open Rotor Engine Counter-rotating Prop-fan Characteristics Research Based on CFD

作　　者：王定奇 李秋锋[1] 于洋 黎森 WANG Ding-qi;LI Qiu-feng;YU Yang;LI Sen(The Engine Department of Chinese Flight Test Establishment,Xi’an 710089,China)

机构地区：[1]中国飞行试验研究院发动机所,西安710089

出　　处：《科学技术与工程》2022年第36期16246-16252,共7页Science Technology and Engineering

摘　　要：桨扇发动机是一种新型涡桨发动机,可适用于高速飞行。以某对转桨扇发动机三维模型为对象,采用计算流体动力学(computational fluid dynamics,CFD)方法对桨扇滑流开展数值模拟。利用分区拼接网格技术对桨扇旋转区域和外流场域进行网格划分及拼接;在此基础上采用雷诺平均N-S(Navier-Stokes)方程,雷诺应力项采用RNG k-ε(k为湍动能,ε为耗散率)湍流模型,基于滑移网格方法,开展了针对不同来流马赫数、桨叶角及桨叶转速的流场的数值计算。结果表明:桨叶角对于拉力影响较大,在桨叶角30°~35°,桨扇的拉力变化范围可达37.8%,功率变化可达28.4%。桨叶拉力随着转速的增大而增大,在转速达到1600 r/min后,前后排桨叶的拉力系数最大相差33%,当转速继续增大,气流通过前后排桨叶偏转角度大,气流失速严重,桨叶拉力增幅减小。通过对该型桨扇发动机流场的计算,定量获取了桨扇的拉力、功率特性,为后续桨扇发动机的推力计算提供参考。The propfan engine was a new type of turboprop engine,which is suitable for high-speed flight.Take the open rotor engine prop-fan as the research object,computational fluid dynamics(CFD)method was used for numerical calculation of prop-fan slip flow.The prop-fan rotating region and outer flow field were matched by splicing grid technique.On this basis,Reynolds mean Navier-Stokes(N-S)equations and RNG k-ε(k is the turbulent kinetic energy,εis the dissipation rate)turbulence model were used to calculate the flow field of different Mach number,blade angle and rotor speed.The results show that the blade angle has a great influence on the thrust,at the angle of 30°to 35°,the range of thrust up to 37.8%and power up to 28.4%.The thrust increase as the rotor speed increase,until rotor speed up to 1600 r/min,the maximum thrust of front and rear blade was 33%.When rotor speed continues increase,the deflection angle of air through front and rear blade was larger,and flow stall seriously.Through the calculation of the flow field of this type of prop-fan engine,the thrust and power characteristics of the prop-fan are quantitatively obtained,which provides a reference for the thrust calculation of the subsequent prop-fan engine.

关 键 词：对转桨扇 数值计算 建模 拼接网格 气动特性 

分 类 号：V211.45[航空宇航科学与技术—航空宇航推进理论与工程]