固体火箭技术2025，Vol.48Issue(2)：225-233,9.DOI:10.7673/j.issn.1006-2793.2025.02.007
喷管整体式堵盖打开过程强瞬态流场数值模拟
Numerical simulation on strong-transient flow field during the opening of integral nozzle closure
王琪虎 1王亚军 2褚佑彪 1穆旭 1廖栩锋 1何雨壕 1龙玥霄1
作者信息
- 1. 西安航天动力技术研究所,西安 710025
- 2. 中国航天电子技术研究院,北京 100094
- 折叠
摘要
Abstract
In order to solve the problem of gas leakage before the closure was opened due to the initial gap,and the problem that the initial position of the closure was inconsistent with the actual situation,a numerical model of the strong-transient flow field during the opening of integral closure was established,which was initially sealed before opening by means of the dynamic grid and sliding grid technology.The evolution characteristics of the flow field and the dynamical behaviors of the closure were studied,and the effects of the closure opening pressure,the rate of pressure rise and the density of the closure material on the opening of closure were analyzed.The results show that the opening of closure can be divided into three stages.In the first stage,the annular gap is choked without the throat being choked.In the second stage,the annular gap and the throat are choked at the same time.In the third stage,only the throat is choked,but the flow separation of the downstream flow in the throat is affected by closure.The maximum movement velocity of closure increases by 31.0%when the closure opening pressure increases from 1.5 MPa to 2.5 MPa.The maxi-mum movement velocity of closure increases by 16.9%when the density of the closure material decreases from 3.2 g/cm3 to 2.2 g/cm3.The second stage only occurs when the displacement of closure is 39.5 mm,but the time of occurrence is affected by factors such as the closure opening pressure.关键词
固体火箭发动机/堵盖运动/强瞬态流场/流场演化/动力学行为/耦合机理Key words
solid rocket motor/movement of closure/strong-transient flow field/evolution of flow field/dynamical behaviors/coupling mechanism分类
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王琪虎,王亚军,褚佑彪,穆旭,廖栩锋,何雨壕,龙玥霄..喷管整体式堵盖打开过程强瞬态流场数值模拟[J].固体火箭技术,2025,48(2):225-233,9.
