|Table of Contents|

Numerical Simulation and Analysis of Muzzle Flow Field Coupling with Interior Ballistic Process

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2009年03期
Page:
335-338
Research Field:
Publishing date:

Info

Title:
Numerical Simulation and Analysis of Muzzle Flow Field Coupling with Interior Ballistic Process
Author(s):
YU WeiZHU BinZHANG Xiao-bing
School of Power Engineering,NUST,Nanjing 210094,China
Keywords:
gun muzzles flow fields interior ballistics unstructured grids coupling projectiles
PACS:
TJ303.2
DOI:
-
Abstract:
The muzzle flow fields after projectiles are driven inside guns are simulated to enhance firing precision.Coupled with interior ballistics process,the initial flow field and the flow field change before and after the projectile shoots out are analyzed.The classical model of interior ballistics is established to simulate the gas in bore,and an aerodynamic model of two dimension and axially symmetry is established to simulate the muzzle flow field.The two models are coupled by the resistance of the pressure in front of the projectile.The influence of the moving projectiles is also considered in simulating process by use of the method of unstructured grids.The numerical results are in good agreement with the experimental ones.Shockwaves of muzzle flow fields are obtained cleanly.Conclusions are drawn through simulations as follows:axial mach number distribution at the time 1.5 ms after the projectile fly out of muzzle is obtained;the maximum mach number is 6.32 at that time;the velocity of powder gas decreases to the subsonic after shockwaves.The pressure simultaneously has step offsets when shockwaves operate.

References:

[ 1] 金志明. 枪炮内弹道学[M ]. 北京: 北京理工大学出版社, 2004. 10- 11.
[ 2] Jiang Z, Takayam a K, Skew s B W. W ave interac tion fo llow ing the em ergence o f a superson ic pro jec tile from a tube[ A] . 17th Interna tiona l Sym po sium on Ballistics [ C ]. M idrand, Sou th Africa: IBC, 1998. 9- 16.
[ 3] Sakamoto K, M atsunnaga K, Fukushim a J, et a.l Num er ica l analysis o f the propagating b last wave in a fir ing range[ A ]. 19th International Symposium on Ba llistics [ C ]. Interlaken, Sw itzer land: IBC, 2001. 289- 296.
[ 4] A ibarow A V, Babayev D B, M ironov A A. Num er ica l simu lation o f 3D m uzzle brake and m issile launcher flow fie ld in the presence o fm ovab le objects[ A]. 20 th Inte rnational Sym posium on Ballistics [ C ] . Orlando, USA: IBC, 2002. 226- 232.
[ 5] 尤国钊, 魏琪. 膛口流场的数值模拟[ J] . 爆炸与冲击, 1989, 9( 3): 254- 260.
[ 6] 马大为. 含复杂波系的膛口非定常流场[ D] . 南京: 南京理工大学图书馆, 1991.
[ 7] 乐贵高, 马大为, 冯勇, 等. 某火炮膛口流场数值仿真[ J]. 兵工学报, 2004, 25( 1): 19- 22.
[ 8] 代淑兰, 许厚谦, 孙磊. 含运动边界的膛口流场数值模拟[ J]. 弹道学报. 2007, 19( 3): 93- 96. [ 9] 陶文铨. 数值传热学[M ]. 第2版. 西安: 西安交通大学出版社, 2001. 428.

Memo

Memo:
-
Last Update: 2012-11-19