活塞式供粉装置中进气流量对粉末流化输送特性的影响

任冠龙; 孙海俊; 徐义华

doi:10.12382/bgxb.2022.0582

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活塞式供粉装置中进气流量对粉末流化输送特性的影响

更新时间：2025-08-18

- 活塞式供粉装置中进气流量对粉末流化输送特性的影响
- Effects of Intake Flow Rate on Powder Fluidization and Conveying in a Piston-Type Powder Feeding Device
- 兵工学报 2023年44卷第10期页码：2906-2919
- 作者机构：
  
  1. 南昌航空大学飞行器工程学院, 江西南昌 330063
  2. 南昌航空大学江西省微小航空发动机重点实验室, 江西南昌 330063
- 作者简介：
  
  *邮箱: sunhaij1987@163.com
- 基金信息：
  
  国家自然科学基金项目(12102161);航空科学基金项目(20200001056001)
- DOI：10.12382/bgxb.2022.0582
  中图分类号：
- 收稿：2022-06-30，
  
  网络首发：2023-12-15，
  
  纸质出版：2023-10-30
- 稿件说明：
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任冠龙, 孙海俊, 徐义华. 活塞式供粉装置中进气流量对粉末流化输送特性的影响[J]. 兵工学报, 2023,44(10):2906-2919.

Guanlong REN, Haijun SUN, Yihua XU. Effects of Intake Flow Rate on Powder Fluidization and Conveying in a Piston-Type Powder Feeding Device[J]. Acta Armamentarii, 2023, 44(10): 2906-2919.
任冠龙, 孙海俊, 徐义华. 活塞式供粉装置中进气流量对粉末流化输送特性的影响[J]. 兵工学报, 2023,44(10):2906-2919. DOI： 10.12382/bgxb.2022.0582.

Guanlong REN, Haijun SUN, Yihua XU. Effects of Intake Flow Rate on Powder Fluidization and Conveying in a Piston-Type Powder Feeding Device[J]. Acta Armamentarii, 2023, 44(10): 2906-2919. DOI： 10.12382/bgxb.2022.0582.

摘要

针对粉末发动机中活塞式燃料供给系统

设计一种内置进气通道式供粉装置。基于欧拉-欧拉双流体模型

在气体-粉末-运动壁面多个物理耦合作用下

开展进气流量对粉末流化和输送特性的数值仿真研究。研究结果表明:气固分界面主要在进气口上部波动;随进气流量的增加

气相作用范围和粉末层(粉末体积分数

=0.1)面积增大

不同进气流量下的拟颗粒温度峰值主要存在两相喉道附近

锥形收敛段头部位置和两相喉道处的气固两相速度随进气流量增大而增大

粉末面平均体积分数随进气流量增大而降低;当流量比为0.10%时

出口处的粉末在输送后期会发生突喷现象

且粉末储箱内压力出现明显的跃升和骤降

当流量比为0.33%时

出口粉末流量波动和粉末储

箱内压力波动相对稳定

当流量比为0.56%~1.25%时

出口粉末流量和粉末储箱内压力分别表现出相似的波动规律

但波动幅度较大。研究结果为发展高效的粉末输送装置提供了理论参考。

Abstract

A built-in intake channel powder feeding device is designed for the piston-driven powder fuel supply system

and the action of the multi-physical coupling of the gas-powder-moving wall is established. Numerical simulations are carried out to investigate the variation of intake flow rate on powder fluidization and conveying characteristics using the Eulerian-Eulerian two-fluid model. The results show that gas-solid interface fluctuations mainly occur in the upper part of the intake channel. With an increasing intake flow rate

both the gas phase distribution range and the area covered by the powder layer (Powder volume fraction

=0.1) increase. The peak granular temperature at different intake flow rates is mainly located near the two-phase throat. The gas-solid two-phase velocity at the head position of the conical convergence section and the two-phase throat increases with increasing intake flow rate

while the area-averaged powder volume fraction decreases. When the mass flow rate ratio is 0.10%

a sudden spurt phenomenon occurs in the outlet powder flow during the late conveying stage

while the pressure in the powder storage tank drops abruptly. When the mass flow rate ratio is 0.33%

the outlet powder flow rate and pressure fluctuations in the powder storage tank are relatively stable. For mass flow rate ratios ranging from 0.56% to 1.25%

both outlet powder flow rate and pressure in the powder storage tank exhibit similar fluctuation patterns

albeit with larger amplitudes. The findings of the study provide a theoretical reference for the development of an efficient powder conveying device.

关键词

Keywords

references

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