Numerical Investigation of Thermal Stratification in Liquid Oxygen Tank for New-Style Launch Vehicle During Ground Precooling

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Numerical Investigation of Thermal Stratification in Liquid Oxygen Tank for New-Style Launch Vehicle During Ground Precooling

更新时间：2025-07-09

- Numerical Investigation of Thermal Stratification in Liquid Oxygen Tank for New-Style Launch Vehicle During Ground Precooling
- Vol. 42, Issue 9, Pages: 1132-1136(2008)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： V421.33
- Online First：10 September 2008，
  
  Published：2008
- 稿件说明：
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Numerical Investigation of Thermal Stratification in Liquid Oxygen Tank for New-Style Launch Vehicle During Ground Precooling[J]. 2008, 42(9): 1132-1136.
DOI：

Numerical Investigation of Thermal Stratification in Liquid Oxygen Tank for New-Style Launch Vehicle During Ground Precooling[J]. 2008, 42(9): 1132-1136. DOI：

摘要

针对新型运载火箭液氧贮箱的热分层现象

采用计算流体力学(CFD)技术对液氧贮箱内部的物理场进行数值模拟

揭示了贮箱内部温度场及速度场的分布规律

并分析了液氧热分层的形成过程及原因.研究表明:回流口截面以上区域的传热以对流方式为主

底部区域则主要是逐层导热; 贮箱内部主体区域形成轴向温度分层

底部区域产生径向温度分层

最低温度区域偏移至底部封头右侧; 气枕区形成逆时针速度旋涡

液相主体区产生顺时针速度旋涡

贮箱底部由于流场影响产生逆时针速度旋涡.

Abstract

Aiming at the thermal stratification in liquid oxygen tank of new-style launch vehicle

a numerical investigation was performed for physical field of tank based on computational fluid dynamics(CFD)technique to depict the temperature distributions and velocity fields

and then to analyze the development of thermal stratification. The results show that the convection heat transfer plays an important role in the bulk above the return flow section

and heat conduction arises only in the bottom region. The axial thermal stratification is produced in the main range of tank and the radial stratification appears at the bottom

and the lowest temperature region moves towards the right of bottom header. The anticlockwise velocity vortex is formed in gas region while a clockwise vortex is presented in the area of liquid phase

whereas the velocity vortex in the bottom changes from clockwise to anticlockwise due to the transformation of flow field.

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references

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