火箭技术

一次燃气入口角度对水冲压发动机比冲性能影响分析

  • 晁侃 ,
  • 牛楠 ,
  • 陆贺建
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  • 中国航天科技集团第四研究院第41研究所,西安 710025

晁侃(1983-),男,陕西宝鸡人,高级工程师,博士,研究方向:固体火箭发动机技术。

收稿日期: 2017-01-13

  网络出版日期: 2025-05-22

Effect of Primary Gas Entrance Angle on Specific Impulse of Water Ramjet

  • CHAO Kan ,
  • NIU Nan ,
  • LU Hejian
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  • The 41st Institute of the Fourth Academy, CASC, Xi'an 710025, China

Received date: 2017-01-13

  Online published: 2025-05-22

摘要

为了研究一次燃气入口方式对于水冲压发动机性能的影响,基于涡耗散模型建立某高金属含量镁基推进剂水冲压发动机三维多相流摻混燃烧反应模型,获得了一次燃气不同入口角度对补燃室内温度分布、镁组分变化以及发动机比冲的影响。计算结果表明,多股燃气中心汇聚明显加剧了一次进水区域内的镁/水燃烧反应速度,有效提高了发动机工作压强和比冲,同时有利于减少镁/水充分反应所需的补燃室长度。

本文引用格式

晁侃 , 牛楠 , 陆贺建 . 一次燃气入口角度对水冲压发动机比冲性能影响分析[J]. 弹箭与制导学报, 2017 , 37(5) : 87 -90,98 . DOI: 10.15892/j.cnki.djzdxb.2017.05.020

Abstract

In order to investigate the effect of primary gas entrance angle on engine performance of water ramjet, based on eddy dissemination model, a 3-D multi-phase non-premixed combustion reaction model was established in a high level magnesium-based water ramjet, the influence of gas entrance angle on temperature distribution, variety of the mass fraction of magnesium in the afterburning chamber and specific impulse of water ramjet were also obtained. The numerical results show that several stream primary gases impacting in the center of water ramjet obviously increases magnesium-water reaction rate in the primary water penetration region, efficiently improves operating pressure and specific impulse of water ramjet, and also benefits for shortening the length of the afterburning chamber for the magnesium-water complete reaction.

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