航天推进技术研究院主办
[1]李元启,赵晓慧,陈宏玉,等.燃烧组件时域分布参数系统动力学模型[J].火箭推进,2022,48(04):29-35.
LI Yuanqi,ZHAO Xiaohui,CHEN Hongyu,et al.Time domain distributed parameter system dynamic model of combustion components[J].Journal of Rocket Propulsion,2022,48(04):29-35.
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LI Yuanqi,ZHAO Xiaohui,CHEN Hongyu,et al.Time domain distributed parameter system dynamic model of combustion components[J].Journal of Rocket Propulsion,2022,48(04):29-35.
燃烧组件时域分布参数系统动力学模型
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
48
期数:
2022年04期
页码:
29-35
栏目:
目次
出版日期:
2022-08-21
- Title:
- Time domain distributed parameter system dynamic model of combustion components
- 文章编号:
- 1672-9374(2022)04-0029-07
- Keywords:
- liquid rocket engine combustion components distributed parameter method nonlinear time domain model
- 分类号:
- V433.9
- 文献标志码:
- A
- 摘要:
- 液体火箭发动机的动态特性,特别是与燃烧组件相关的系统动力学特性,一直是理论研究和工程设计中重要的研究内容。在时域上建立了非线性分布参数燃烧组件动力学模型。将时域的频率研究范围从低频扩充到涵盖一阶纵向声学频率的中高频范围。采用了时空分离的方法对模型进行数值求解,采用ROE格式对模型进行空间离散,采用Dassl隐式变步长格式进行时间离散,解决了刚性偏微分方程难以求解的问题。线性热源算例验证表明,该模型能够得到正确的气路稳态解 含熵波和声波的气路算例验证表明,该模型能够准确地反映低频熵波和高频声波特性,且能够准确地描述高频下的熵波耗散现象。
- Abstract:
- The dynamic characteristics of liquid rocket engines, especially the system dynamics characteristics related to combustion components, have always been an important research content in theoretical research and engineering design.In this paper, the dynamic model of nonlinear distributed parameter combustion module was established in time domain.The research range of frequency in the time domain was extended from low frequency to middle and high frequency which covers the first order longitudinal acoustic frequency.The numerical solution of the model was carried out by the method of space and time separation, the model was spatially discretized by the ROE scheme, and the time discretized by the Dassl implicit variable step size scheme.So the problem of rigid partial differential equation was solved.Examples of passive isocross section, passive variable cross section and linear heat source show that the correct steady-state solution of gas path and basically capture the discontinuous characteristics of flow field can be obtained by the model.The gas-path examples of entropy wave and sound wave show that the characteristics of low-frequency entropy wave and high-frequency sound wave can accurately be reflected by the model.The dissipation phenomenon of entropy wave at high frequency can also be described.
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备注/Memo
收稿日期:2021-12-13 修回日期:2022-01-23
基金项目:国家重点实验室基金(6142704180308)
作者简介:李元启(1987—),男,博士,工程师,研究领域为液体火箭发动机系统动力学。
更新日期/Last Update:
1900-01-01