摘要
航空发动机高空冰晶粒子的阻力特性会影响冰晶的运动,为了探究不同形状冰晶对阻力系数的影响,采用高速摄像机跟踪拍摄的方法对球形颗粒和非球形颗粒(长圆柱、短圆柱和圆盘)阻力系数进行研究,根据颗粒匀速状态时的速度求得不同颗粒的雷诺数和阻力系数,并利用实验数据拟合获得不同颗粒在工况范围内适用的阻力系数计算关系式,最后利用拟合数据之外的实验数据对关系式进行验证。结果表明:在雷诺数为3961~24144范围内,四种粒子阻力系数的计算值和试验值平均相对误差在5%以内。
The resistance characteristics of aero-engine high-altitude ice crystal particles will affect the movement of ice crystals.In order to explore the influence of different shapes of ice crystals on the drag coefficient,the paper adopts the method of high-speed camera tracking to investigate the drag coefficient of spherical particles and non-spherical particles(long cylinder,short cylinder and disk).The Reynolds number and drag coefficient of different particles are obtained according to the velocity of particles at uniform velocity,and the correlation formula for calcu-lating drag coefficient of different particles in the working condition range is obtained by fitting experimental data.Finally,the correlation formula is verified by using experimental data other than fitting data.The results show that the Reynolds number ranges from 3961 to 24144.The average relative error between the calculated and experi-mental values of the four particle resistance coefficients is less than 5%.
作者
刘建芳
沈浩
张丽芬
朱鹏飞
LIU Jianfang;SHEN Hao;ZHANG Lifen;ZHU Pengfei(School of Power and Energy,Northwestern Polytechnical University,Xi'an 710129,China;Shanghai Aircraft Airworthiness Certification Center,Civil Aviation of China,Shanghai 200335,China)
出处
《航空工程进展》
CSCD
2024年第2期35-41,共7页
Advances in Aeronautical Science and Engineering
基金
中国空气动力研究与发展中心结冰与防除冰重点实验室开放课题(IADL20190206)。
关键词
冰晶
阻力系数
发动机结冰
非球形颗粒
高速摄像机
ice crystals
drag coefficient
engine icing
non-spherical particles
high-speed cameras
