平流层飞艇对转螺旋桨推进性能研究  

Study of propulsion performance of contra-rotating propellers for stratospheric airship

作　　者：张宇 王晓亮[1] 马影 ZHANG Yu;WANG Xiaoliang;MA Ying(School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240, China;School of Air Transportation, Shanghai University of Engineering Science, Shanghai 201620, China)

机构地区：[1]上海交通大学航空航天学院,上海200240 [2]上海工程技术大学航空运输学院,上海201620

出　　处：《大连理工大学学报》2020年第3期221-227,共7页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(61733017);上海市自然科学基金资助项目(18ZR1419000)。

摘　　要：为研究平流层飞艇对转螺旋桨安装参数对推进性能的影响,探寻其效率提升的内因,使用混合网格技术进行计算域离散,采用基于RANS方程和SST湍流模型的求解器,建立了多重参考系模型,通过与由片条理论和遗传算法优化所得结果对比,验证了数值方法的准确性.对以Clark Y翼型设计的对转螺旋桨推进性能进行了研究,分析了在不同前进比J和不同螺旋桨间距L情况下,对转螺旋桨推力系数、扭矩系数和效率的变化.结果表明,在产生相同推力的情况下,对转螺旋桨效率较单桨提高13.3%,综合扭矩仅为单桨的4.8%;随着L的增大,推力系数和扭矩系数均有所上升,当J=0.5时,效率最高;绝大多数情况下,综合扭矩低于9 N·m,对转螺旋桨前、后桨的推力比期望值为1.29.In order to study the influence of the installation parameters of the stratospheric airship contra-rotating propellers(CRP)on the propulsion performance and explore the internal factors of its efficiency improvement,the hybrid grid technique is used to discretize the computational domain,and the multi-reference frame model is established with using the solver based on Reynolds averaged Navier-Stokes(RANS)equations and SST turbulence model.The accuracy of the numerical method is verified by comparison with results obtained by strip theory and genetic algorithm.The propulsion performance of CRP designed with Clark Y airfoil is studied.The variation of thrust coefficient,torque coefficient and efficiency of the propellers is analyzed under different forward ratios J and different propeller spacing L.The results show,in the case of the same thrust,the efficiency of CRP is 13.3%higher than that of the single propeller,and the resultant torque is only 4.8%of the single propeller;as L increases,the thrust and torque coefficients both rise,when J equals 0.5,the efficiency is the highest;in most cases,the resultant torque is less than 9 N·m,and the average thrust ratio of the front and rear propellers is 1.29.

关 键 词：平流层飞艇 对转螺旋桨 混合网格 多重参考系 计算流体力学 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]