井式火箭发射场井口岩石颗粒运动规律研究  

The Characteristic of Rock Particle Movement on Launching Site During Rocket Launching

作　　者：沈晖航 谢建 李良 权辉 SHEN Hui-hang;XIE Jian;LI Liang;QUAN Hui(Rocket Force University of Engineering,Xi'an Shanxi 710025,China)

机构地区：[1]火箭军工程大学,陕西西安710025

出　　处：《计算机仿真》2019年第1期65-70,共6页Computer Simulation

基　　金：国家自然科学基金(51475462)

摘　　要：火箭井式发射过程中,受燃气引射作用影响井口会产生负压,导致井口周围的大气以较高的速度流向井内。为了预测井口周围发射场坪上的岩石颗粒是否会在引流作用下撞击到正在出井的火箭,在对某型火箭出井过程进行数值仿真的基础上提取出场坪流场数据,采用运动学分析法研究了岩石颗粒在场坪流场中的运动规律。研究结果表明:距离井口中心一定范围内,直径从几毫米到几百毫米不等的岩石颗粒在引流作用下能撞击到箭体;不同径向距离上相同大小的岩石颗粒,其撞击速度和撞击角度差别很小。相同径向距离上不同大小的岩石颗粒,直径越小撞击速度越高,直径越大撞击角度越大。During the rocket silo launching,negative pressure will be generated at the wellhead due to gas injection,causing the air around to flow to the silo at a higher velocity. In order to predict whether or not the rock particles on launching site will impact the rocket,the flow field data were extracted based on the numerical simulation of rocket launch,the method of kinematics analysis was used to study the characteristic of rock particle movement. The results show that rock particles ranging in diameter from a few millimeters to hundreds millimeters within a certain distance from the center of the wellhead can impact the rocket. When rock particles of the same size are at different radial distances,the difference of impact velocity and angle is very small. And when rock particles of different sizes are at the same radial distance,the impact velocity is inversely proportional to the diameter while the impact angle is proportional to the diameter.

关 键 词：发射场坪 岩石颗粒 运动规律 数值仿真 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]