| 固体火箭发动机后效推力对导弹底阻影响的数值仿真 |
| |
| 引用本文： | 张程,李新田,廖选平,卢鑫,李延成.固体火箭发动机后效推力对导弹底阻影响的数值仿真[J].航空动力学报,2017,32(6):1530-1536. |
| |
| 作者姓名： | 张程 李新田 廖选平 卢鑫 李延成 |
| |
| 作者单位： | 1.国防科学技术大学 航天科学与工程学院，长沙 410073； 中国航天科技集团公司 中国运载火箭技术研究院，北京 100076 |
| |
| 摘 要： | 采用二维轴对称N-S方程与湍流模型相结合，建立了固体火箭发动机喷管尾流和弹体外流一体化仿真模型.针对给定的导弹模型，开展了不同发动机燃气流量下的流场仿真，得到了流场速度和压力分布，分析了不同燃气流量下发动机后效推力对导弹底阻的影响.结果表明:与发动机不工作时相比，加入较小的燃气流量后，导弹底部压力增大，底阻值减小.随着燃气流量的增加，底部压力先减小后增大，底阻先增大后减小.随着燃气流量的增加，后效推力与导弹底阻的合力不断增大，且动推力所占比重逐渐增加.
|
| 关 键 词： | 固体火箭发动机 后效推力 导弹底阻 燃气流量 二维模拟 |
| 收稿时间： | 2015/12/20 0:00:00 |
Numerical simulation of influences of solid rocket motor post-thrust on missile base drag |
| |
| ZHANG Cheng,LI Xintian,LIAO Xuanping,LU Xin,LI Yancheng.Numerical simulation of influences of solid rocket motor post-thrust on missile base drag[J].Journal of Aerospace Power,2017,32(6):1530-1536. |
| |
| Authors: | ZHANG Cheng LI Xintian LIAO Xuanping LU Xin LI Yancheng |
| |
| Abstract: | Coupled with two-dimensional axisymmetric N-S equation and turbulence model, integral flow field simulation models were established for solid rocket motor nozzle tail flow and missile outer flow. For a given missile model, numerical simulations were carried out under different combustion gas mass flow rates. Velocity and pressure contours were obtained and influences of solid rocket motor post-thrust on missile base drag were analyzed under different combustion gas mass flow rates. According to the results, compared with the case when the motor was in idle condition, the missile base pressure increased and base drag decreased under low combustion gas mass flow rate. As the combustion gas mass flow rate increased, the missile base pressure decreased first and then increased; on the contrary, the missile base drag increased first and then decreased. As the combustion gas mass flow rate increased, resultant force of post-thrust and base drag increased, and the proportion of momentum thrust increased gradually. |
| |
| Keywords: | solid rocket motor post-thrust missile base drag combustion gas mass flow rate two-dimensional simulation |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《航空动力学报》浏览原始摘要信息 |
|
点击此处可从《航空动力学报》下载全文 |
|
