阻力伞附加质量与阻力系数修正方法  

Added Mass and Correction Method for Testing Drag Coefficient of Drag Parachute

作　　者：孙建红[1,2] 孙智 王从磊[3] 余元元 侯斌[1] 房明 SUN Jianhong;SUN Zhi;WANG Conglei;YU Yuanyuan;HOU Bin;FANG Ming(Key Laboratory of Aircraft Environment Control and Life Support,MIIT,Nanjing University of Aeronautics&Astronautics,Nanjing 210016,China;College of Civil Aviation,Nanjing University of Aeronautics&Astronautics,Nanjing 211106,China;AVIC Hongguang Airborne Equipment Co.,Ltd.,Nanjing 210022,China;Aviation Key Laboratory of Science and Technology on Life‑Support Technology,AVIC Aerospace‑Life‑Support Industries Ltd.,Xiangyang 441003,China;CRRC Nanjing Puzhen Co.,Ltd.,Nanjing 210031,China)

机构地区：[1]南京航空航天大学飞行器环境控制与生命保障工信部重点实验室,南京210016 [2]南京航空航天大学民航学院,南京211106 [3]航空工业宏光空降装备有限公司,南京210022 [4]航空工业航宇救生装备有限公司航空防护救生技术航空科技重点实验室,襄阳441003 [5]中车南京浦镇车辆有限公司,南京210031

出　　处：《南京航空航天大学学报》2021年第2期167-176,共10页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：航空科学基金(20172952031)资助项目;江苏高校优势学科建设工程资助项目。

摘　　要：在阻力伞试验,特别是高速滑车试验过程中,由于阻力伞系统作非匀加速的非定常运动以及前置体尾流场的影响,现有的阻力伞试验数据计算方法已经难以准确计算其阻力系数。本文针对阻力伞试验过程中的这种非定常运动和尾流干扰特性,对阻力伞系统进行了动力学分析,并对阻力伞非定常运动过程中的附加质量和尾流场特性进行了理论研究,提出了阻力伞双质量模型,并建立了阻力伞阻力系数非定常修正和动压修正方法。在此基础上,针对某型十字形单伞和十字形双伞模型的试验结果进行了分析,确定了相应的非定常修正系数和动压修正系数,分别建立了十字形单伞和十字形双伞的阻力系数修正模型。修正模型验证结果与风洞试验和传统计算方法结果进行了对比,研究发现:对于单伞模型,本文计算方法可以使计算结果误差从原来的27%降低到9%以内;对于双伞模型,可以使计算结果误差从原来的30%降低到7%以内。基于附加质量理论分析,非定常和动压损失的阻力系数修正方法可以更准确地计算阻力伞阻力系数,从而为阻力伞试验数据分析提供了一套更准确的计算方法。In the drag parachute test,especially during the process of high-speed rocket sled drag parachute test,due to the nonsteady motion of the drag parachute system with a variable acceleration and the influence of wake field in the anterior body,the existing drag parachute test data analysis methods are often difficult to accurately calculate the drag coefficient.In view of the unsteady and wake interference characteristics of the drag parachute test,this paper starts from the dynamic theory of the drag parachute,and theoretically analyzes the additional mass and wake field characteristics of the drag parachute during the unsteady motion.The drag parachute coefficient correction model of the drag parachute system is established by using nonsteady correction and dynamic pressure correction methods.On this basis,the test results of a certain type of cross-shaped single umbrella and cross-shaped double umbrella models are analyzed,the corresponding nonsteady correction coefficients and dynamic pressure correction coefficients are determined,and the crossshaped single and double umbrella resistance coefficient correction models are established.The results of correction models are compared with wind tunnel tests and traditional calculation methods.The results show that for the single parachute model,the calculation result error can be reduced from the original 27%to less than 9%by the new correction model,and for the double umbrella model,the calculation result error from the original 30%to less than 7%.In this paper,based on the analyses of added mass,the drag coefficient correction method can calculate the drag coefficient of the drag parachute more accurately,so as to provide a more accurate calculation method for the correction of the drag parachute test data.

关 键 词：阻力伞 附加质量 阻力系数 非定常修正 动压修正 双质量模型 

分 类 号：V244.1[航空宇航科学与技术—飞行器设计] V211.3