爆炸与冲击2011，Vol.31Issue(1)：49-54,6.
水下超声速细长锥型射弹超空泡形态的计算方法
A calculation method for supercavity profile about a slender cone-shaped projectile traveling in water at supersonic speed *
摘要
Abstract
By adopting the irrotational and steady motion of the ideal compressible fluid and the supercavity with the Riabushinsky scheme of closure, an integro-differential equation was derived for the supercavitating flow around a slender cone-shaped projectile traveling in water at supersonic speed by using the slender-body theory and the matched-asymptotic-expansions method. The second-order approximation solutions for the supercavity profiles considering the compressibility effect were obtained,and the calculation precision was improved. The influences of the fluid compressibility on the supercavity profiles were analyzed under the high-speed impact of the gun-launched projectile. The fluid compressibility causes slight asymmetry of the supercavity profile, in which the forward part is narrower than the backward part. Because of the compressibility effect, when 1＜(Ma)∞＜（2）, the supercavity profile will expand similarly to the subsonic case; the supercavity profile will keep unchangeable when (Ma)∞ =（2）; and the supercavity profile will occur to a whole contraction when (Ma)∞＞（2）.关键词
流体力学/压缩性/匹配渐近展开法/超空泡/超声速/细长体理论/射弹Key words
fluid mechanics/ compressibility/ matched asymptotic expansions method/ supercavity/supersonic speed/ slender body theory/ projectile分类
数理科学引用本文复制引用
张志宏,孟庆昌,顾建农,金永刚..水下超声速细长锥型射弹超空泡形态的计算方法[J].爆炸与冲击,2011,31(1):49-54,6.基金项目
国家自然科学基金项目(10772196) （10772196）
