Stability Analysis for Projectile with Wrap-Around Fins  

作　　者：王成 宁建国 

机构地区：[1]State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology

出　　处：《Journal of Beijing Institute of Technology》2007年第4期388-392,共5页北京理工大学学报（英文版）

基　　金：the National Natural Science Foundation of China (10572026)

摘　　要：Based on the stability theory, numerical simulations and theoretical calculations are performed for a projectile with wrap-around fins. Its stability is analyzed and the flow field is simulated with computational fluid dynamics method. Consequently, the pitching moment coefficient of the projectile is further investigated under the conditions of Mach number ranging from 0.3 to 0.8, attack angle from 0 to 8° and yaw angle from 0 to 4°. A trajectory equation is established and its trajectory characteristics are also explored. All the results of theoretical analysis, numerical simulation and trajectory equation agree well with each other, which indicates the projectile is flying steadily at the given conditions. These results provide an effective way for judging the stability of the projectile with wrap-around fins.Based on the stability theory, numerical simulations and theoretical calculations are performed for a projectile with wrap-around fins. Its stability is analyzed and the flow field is simulated with computational fluid dynamics method. Consequently, the pitching moment coefficient of the projectile is further investigated under the conditions of Mach number ranging from 0.3 to 0.8, attack angle from 0 to 8° and yaw angle from 0 to 4°. A trajectory equation is established and its trajectory characteristics are also explored. All the results of theoretical analysis, numerical simulation and trajectory equation agree well with each other, which indicates the projectile is flying steadily at the given conditions. These results provide an effective way for judging the stability of the projectile with wrap-around fins.

关 键 词：projectile with wrap-around fins STABILITY pitching moment coefficient numerical simulation trajectory equation 

分 类 号：TB115[理学—数学]