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弹箭与制导学报 >

2023 , Vol. 43 >Issue 3: 115 - 124

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2023.03.018

流化进气口数量对粉末燃料供给特性的影响

  • 邓哲 1 ,
  • 任冠龙 2 ,
  • 沈文 2 ,
  • 蔡平 2 ,
  • 薛瑞 3 ,
  • 孙海俊 2
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  • 1 西北工业大学宁波研究院,浙江 宁波 315103
  • 2 南昌航空大学飞行器工程学院江西省微小航空发动机重点实验室,江西 南昌 330063
  • 3 西安交通大学航天航空学院机械结构强度与振动国家重点实验室,陕西 西安 710049
孙海俊(1987—),男,副教授,博士,研究方向:粉末燃料发动机。

邓哲(1987—),男,副研究员,博士,研究方向:航空宇航科学与技术。

收稿日期: 2023-02-22

  网络出版日期: 2025-02-07

基金资助

航空科学基金(20200001056001)

江西省微小航空发动机重点实验室开放基金(Ef202180433)

收起

Effects of the Number of Fluidization Inlets on Powder Fuel Supply Characteristics

  • DENG Zhe 1 ,
  • REN Guanlong 2 ,
  • SHEN Wen 2 ,
  • CAI Ping 2 ,
  • XUE Rui 3 ,
  • SUN Haijun 2
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  • 1 Ningbo Institute of Northwestern Polytechnical University, Ningbo 315103, Zhejiang, China
  • 2 Jiangxi Key Laboratory of Micro Aeroengine, School of Aircraft Engineering, Nanchang Hangkong University, Nanchang 330063, Jiangxi, China
  • 3 State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China

Received date: 2023-02-22

  Online published: 2025-02-07

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摘要

粉末燃料供给特性是影响粉末发动机工作性能的关键因素之一,为探究粉末燃料的流化和输送过程,通过用户自定义函数实现运动壁面运动,构建了气体-粉末-运动壁面多作用耦合模型,基于欧拉双流体模型,开展了不同进气口数量对粉末燃料供给特性的数值模拟研究,并总结了动壁作用下的稠密气固两相流动规律。研究结果表明:在供粉初期,不同进气口数量下的固相流型演化过程相似,但粉末储箱上部的粉末体积分数随进气口数量增加而降低;在供粉中后期,随进气口数量的增加,粉床高度降低,粉末储箱下部的粉末体积分数增大。当进气口数量为6时,相比数量4和2时,粉末流量波动和压力波动分别降低了约7.6%和30.1%,即适当增加进气口数量,有利于提高粉末供给稳定性。

关键词： 粉末发动机; 粉末供给特性; 进气口; 气固两相流; 准二维结构; 数值模拟

本文引用格式

邓哲 , 任冠龙 , 沈文 , 蔡平 , 薛瑞 , 孙海俊 . 流化进气口数量对粉末燃料供给特性的影响[J]. 弹箭与制导学报, 2023 , 43(3) : 115 -124 . DOI: 10.15892/j.cnki.djzdxb.2023.03.018

Abstract

Powder fuel supply characteristics were one of the key factors that affected the performance of powder engines. In order to explore the powder fuel fluidization and conveying process, the moving wall movement was realized through user-defined functions, and the gas-powder-moving wall multi-action coupling model was constructed. The numerical simulation study on the powder supply characteristics with different numbers of gas inlets was carried out using the Eulerian two-fluid model, and the law of dense gas-solid two-phase flow under the action of a moving wall was summarized. The results show that the evolution process of the solid-phase flow pattern under different numbers of gas inlets is similar at the beginning of the powder supply, but the powder volume fraction in the upper part of the powder storage tank decreases as the number of gas inlets increases; in the middle and late stages of the powder supply, the powder bed height decreases as the number of gas inlets increases, and the powder volume fraction at the lower part of the powder storage tank increases. When the number of gas inlets is six, the powder flow rate fluctuation and pressure fluctuation decrease by about 7.6% and 30.1%, respectively, compared with four and two gas inlets. Properly increasing the number of gas inlets is conducive to improving the stability of the powder supply.

Key words： powder engine; powder supply characteristics; gas inlet; gas-solid two-phase flow; quasi-two-dimensional structure; numerical simulation

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