高效弯掠对转桨扇流动特点与桨距调节规律  

Flow characteristics and pitch regulation of high-efficiency swept-curved counter rotating propellers

作　　者：李治达 陈翔翔 吴涛 董威[1] LI Zhida;CHEN Xiangxiang;WU Tao;DONG Wei(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《航空动力学报》2022年第8期1703-1713,共11页Journal of Aerospace Power

基　　金：民用飞机专项科研(MJ-2017-D-27)。

摘　　要：采用数值计算的方法分析了高亚声速来流条件下弯掠对转桨扇的流动特点,开展了不同自由来流马赫数下的高效对转桨扇桨距调节规律的研究。研究表明:在弯掠桨扇的内部流场,从约30%相对叶高位置处开始形成明显激波结构,但当弯掠桨扇通道内峰值马赫数在1.2及以下时激波强度相对较弱,流动损失在可接受范围。由于桨距角对桨扇的推进效率影响显著,研究提出了可行有效的对转桨扇桨距调节方法,数值计算表明桨扇的推进效率均在75%以上。数值仿真预测的各马赫数下桨扇的推力值表明前叶推力对马赫数的变化更加敏感。The flow characteristics of the swept-curved counter rotating propellers under high subsonic flow were analyzed by numerical calculation method,and the pitch regulation of the high efficiency counter rotating propellers under different free flow Mach numbers was studied.The results showed that in the flow field inside the swept-curved counter rotating propellers,the obvious shock wave structure began to form from about 30%of the relative blade span.However,when the peak Mach number was below 1.2,the shock wave intensity was relatively weak and the flow loss was acceptable.Because of significant effect of the pitch angle on the propulsion efficiency of the counter rotating propellers,a feasible and effective method to adjust the pitch of the counter rotating propellers was proposed.The numerical calculation showed that the propulsion efficiency of the counter rotating propellers was above 75%.The thrust values predicted by numerical simulation showed that the thrust of the front blade was more sensitive to the change of Mach number.

关 键 词：弯掠对转桨扇 桨距调节 激波损失 推进效率 马赫数 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]