Study on Charge Accumulation of Solid Air Particles in Liquid Hydrogen PipeFlow and Particles Movement Performance

LI Zhuolun; WANG Lei; LEI Gang; CHEN Qiang; MA Yuan; LI Yanzhong

doi:10.7652/xjtuxb202308006

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Study on Charge Accumulation of Solid Air Particles in Liquid Hydrogen PipeFlow and Particles Movement Performance

更新时间：2025-05-08

- Study on Charge Accumulation of Solid Air Particles in Liquid Hydrogen PipeFlow and Particles Movement Performance
- Vol. 57, Issue 8, Pages: 55-65(2023)
- 作者机构：
  
  1. 西安交通大学制冷与低温工程系,西安,710049
  2. 航天低温推进剂技术国家重点实验室,北京,100028
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202308006
  CLC： V434
- Online First：10 August 2023，
  
  Published：2023
- 稿件说明：
移动端阅览
LI Zhuolun, WANG Lei, LEI Gang, et al. Study on Charge Accumulation of Solid Air Particles in Liquid Hydrogen PipeFlow and Particles Movement Performance[J]. 2023, 57(8): 55-65.
DOI：

LI Zhuolun, WANG Lei, LEI Gang, et al. Study on Charge Accumulation of Solid Air Particles in Liquid Hydrogen PipeFlow and Particles Movement Performance[J]. 2023, 57(8): 55-65. DOI： 10.7652/xjtuxb202308006.

摘要

为揭示液氢管流静电产生机理与积累规律

以液氢流-固空颗粒二元体系为对象

选择OpenFOAM开源软件

通过添加固空颗粒受力模型、摩擦起电模型、低电导率流体起电模型、颗粒带电模型等

实现了仿真软件的功能拓展。通过耦合多相质点网格法满足了液固两相流场-电场的耦合求解。数值仿真了固空颗粒在带电液氢管流中的电荷积累过程

探讨了固空颗粒粒径、空气含量对管流系统电量积累的影响。研究结果发现

当液氢流速为3 m/s时

纯液氢饱和电荷密度约1.358×10

-7

C/m

而固空颗粒引起的电荷密度较之高3个数量级。相较于纯液氢管流

含固空颗粒的液氢管流静电风险更大。当固空粒径为0.1 mm时

大部分固空颗粒带电量在3.16×10

-12

～1.58×10

-11

C之间; 增大粒径或减少空气含量均会造成带电颗粒占比增加

颗粒平均电量增加。研究工作对液氢管路系统设计与安全防护应具有理论指导意义。

Abstract

To reveal the charge formation mechanism and accumulation behaviors in a liquid hydrogen flow condition

the binary system of solid air particles in liquid hydrogen pipe flow was taken as the object

and the open source software platform OpenFOAM was adopted. Several additional functions

including force model on the solid particles

electrification model by LH

-wall friction

low-conductivity fluid charge model and particle charge model

were established and incorporated into the software platform to extend its predictive abilities. With

the multi-phase particle-in-cell(MP-PIC)method

the coupled calculation of liquid-solid two-phase flow field and electric field was reached. Based on this extended-function software

the charge accumulation in the LH

flow event with solid air particles was simulated

and the influences of particle size and air amount on charge accumulation performance were analyzed. The results show that the charge density in a pure LH

flow event is about 1.358×10

-7

C/m

when the flow rate is 3 m/s

while the charge density in a solid air particle existence case is higher than this value by three orders of magnitude. Therefore

the charge risk in the solid air particle existence case is greater than that in a pure liquid hydrogen flow condition. Most solid air particles

with a diameter of 0.1 mm

have the charge amount of about 3.16×10

-12

C to 1.58×10

-11

C. Increasing the particle size or decreasing the air content in the system increases the proportion of charged particles

as well as the average particle electric quantity. The present study is of theoretically instructive significance to the design and safety protection of liquid hydrogen pipeline systems.

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