摘要
针对回转体低速倾斜入水过程空泡的生成机理和演化特性开展研究。通过不同入水速度和入水角度回转体倾斜入水对比实验,研究了入水速度和入水角度对入水空泡、回转体速度、俯仰角及阻力系数的影响规律。研究结果表明:空泡深闭合时刻的空泡长度、最大空泡直径和空泡闭合点深度随着回转体入水速度的增加而增大;空泡深闭合发生时间随着入水速度的增加而小幅增大;同一入水时刻回转体俯仰角和俯仰角速度均随入水速度的增加而减小;随着回转体入水角度的增加,同一时刻入水空泡直径和回转体速度逐渐减小,阻力系数逐渐增大。
Studies of the oblique water entry of revolution bodies are conducted. By the experiment of revolution body velocity water entry with different velocities and angles, cavity evolution on revolution bodies is discussed, including formation, development and pinch-off of oblique entry. The influence of water entry ve- locity and angle on the cavities, revolution body velocity, pitching angle and drag coefficients was experimen- tally obtained. The experiments show that at the moment when the cavity is pinched off, the length and largest diameters of the cavity, and the depth of the closure point are larger as the velocity of revolution bodies increa- ses. The cavity closure time increases slightly with the increase of revolution body velocity. When the velocity of revolution bodies is larger, the pitching angle and angle velocity are smaller. With the increase of water-en- try angle of revolution bodies, the diameter of the cavity and the velocity of revolution bodies gradually become smaller, but the drag coefficients become larger.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2016年第11期2386-2394,共9页
Journal of Beijing University of Aeronautics and Astronautics
基金
黑龙江省自然科学基金(A201409)
中央高校基本科研业务费专项资金(HIT.NSRIF.201159)
哈尔滨市科技创新人才研究专项资金(2013RFLXJ007)~~
关键词
回转体
运动参数
倾斜入水
入水空泡
实验研究
revolution body
kinematical parameters
oblique water entry
water entry cavity
experi-ment study
