|Table of Contents|

Variable thrust design and simulation of a gas generator(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2019年06期
Page:
38-44
Research Field:
研究与技术
Publishing date:

Info

Title:
Variable thrust design and simulation of a gas generator
Author(s):
FU Wenjuan;  ZENG Qingxuan;  LI Mingyu
(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China)
Keywords:
variable thrust drive;  gas generator;  structural design;  verification test;  numerical simulation
PACS:
V421.4
DOI:
-
Abstract:
For meeting the launch requirements of a single launch system for missiles with different initial velocities and different weights, a set of gas generator with multiple gas-producing grains, adaptive ignition and variable thrust was deigned.Firstly, according to the missile weight and its velocity requirements, the gas-producing grain was designed preliminarily.Its gas production performance and reliability were tested, providing the basis for the subsequent optimization of structural design and simulation.Then, a numerical simulation method was used to explore the changes of the missile weight, the grain number, the acting time, the internal pressure of launch system and the projectile movement with time.The simulation results show that if the driving conditions are same, the heavier the projectile is, the smaller the velocity is at the exit of the launch tube and the longer the time is.For the same projectile, the more the number of acting grains is, the faster the projectile is at the exit of the launch tube and the shorter the time it takes.In order to prevent the excessive pressure in the launch tube caused by the number of acting grains, the time sequence control device is used to control the time sequence, and the optimal scheme is obtained from the time sequence combination of different acting grains.Simulation and experimental results show that the designed gas generator grain has good combustion performance, adaptive ignition and variable thrust, and its design is basically reasonable.

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Last Update: 2019-12-20