喷管摆动角度和频率对SRM中压力振荡响应特性的影响 *

推进技术 ›› 2018, Vol. 39 ›› Issue (4): 810-818.

喷管摆动角度和频率对SRM中压力振荡响应特性的影响 *

张莹¹,王革¹,李冬冬¹,韩万之¹,王立民²

哈尔滨工程大学航天与建筑工程学院，黑龙江哈尔滨 150001,哈尔滨工程大学航天与建筑工程学院，黑龙江哈尔滨 150001,哈尔滨工程大学航天与建筑工程学院，黑龙江哈尔滨 150001,哈尔滨工程大学航天与建筑工程学院，黑龙江哈尔滨 150001,内蒙动力机械研究所，内蒙古呼和浩特 010000

发布日期:2021-08-15
作者简介:张莹，女，硕士生，研究领域为火箭发动机内流场。E-mail: dreamhigh@hrbeu.edu.cn 通讯作者:王革，男，博士，教授，研究领域为火箭发动机燃烧、流动及内弹道。

Effects of Angle and Frequency of Nozzle Swing on Pressure Oscillation Response in Solid Rocket Motors

College of Aerospace and Civil Engineering，Harbin Engineering University，Harbin 150001，China,College of Aerospace and Civil Engineering，Harbin Engineering University，Harbin 150001，China,College of Aerospace and Civil Engineering，Harbin Engineering University，Harbin 150001，China,College of Aerospace and Civil Engineering，Harbin Engineering University，Harbin 150001，China and Dynamic Machinery Institute of Inner Mongolia，Hohhot 010010，China

Published:2021-08-15

摘要/Abstract

摘要： 喷管摆动可能会诱发燃烧不稳定性，而不稳定性问题已经受到了国内外研究人员的高度重视。为了研究喷管摆动角度和频率对燃烧室内压力振荡响应的影响，采用数值模拟方法，在给定某时刻装药燃面、喉径和正弦摆动方式下，对不同摆角和摆频下的发动机燃烧室压强变化规律及喷管摆动过程的响应规律进行数值分析。研究表明:固定摆动频率，改变摆动角度，燃烧室内平均压力都随时间小幅度上升，摆动角度为3°和7°时，平均压强增量较其它角度而言较为明显；固定摆动角度，随着摆动频率的增加，喷管摆动引起燃烧室内低频响应幅值在增加；由喷管摆动所引起的燃烧室压力振荡频率主要集中在100Hz以下的低频区。

关键词: 固体火箭发动机；摆动喷管；推力矢量控制；内流场；频谱分析

Abstract: The instability of the combustion may be induced by the swing of the nozzle， and the problem of instability has been paid great attention by the researchers at home and abroad. To investigate the effects of the swing angle and frequency of nozzle on pressure oscillation in combustion chamber， the analysis on the pressure variation and response law under different swing angle and frequency in combustion chamber of solid rocket motors has been conducted by numerical simulation， on the condition that the burning area of grain and throat diameter are given at certain time and the swing method is fixed on sine. The results show that on condition of the fixed swing frequency， when the swing angle is changed， the average pressure of combustion chamber increases slightly with time. When the swing angles are 3° and 7°， the average pressure increment is more pronounced than the other angles. With the increase of the swing frequency， the amplitude of low frequency response caused by the swing of nozzle is increasing under the same swing angle. Pressure oscillation caused by swing nozzle is mainly concentrated in the low frequency region below 100Hz.

Key words: Solid rocket motor；Swing nozzle；Thrust vector control；Internal flow field；Spectrum analysis

张莹,王革,李冬冬,韩万之,王立民. 喷管摆动角度和频率对SRM中压力振荡响应特性的影响 *[J]. 推进技术, 2018, 39(4): 810-818.

ZHANG Ying¹,WANG Ge¹,LI Dong-dong¹,HAN Wan-zhi¹,WANG Li-min². Effects of Angle and Frequency of Nozzle Swing on Pressure Oscillation Response in Solid Rocket Motors[J]. Journal of Propulsion Technology, 2018, 39(4): 810-818.

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