|Table of Contents|

Analysis on pre-cooling filling pipeline of cryogenic fluid base on quasi-one-dimensional model (PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2023年02期
Page:
83-93
Research Field:
目次
Publishing date:

Info

Title:
Analysis on pre-cooling filling pipeline of cryogenic fluid base on quasi-one-dimensional model
Author(s):
REN Xiaowen1;  ZHOU Chenchu1;  CHEN Hongyu2;  LI Ping2;  LIU Yazhou1
(1.Science and Technology on Liquid Rocket Engine Laboratory, Xi'an Aerospace Propulsion Institute, Xi'an 710100, China; 2.Academy of Aerospace Propulsion Technology, Xi'an 710100, China)
Keywords:
one-dimensional;  lumped parameter;  cryogenic;  pre-cooling;  filling
PACS:
V421.42
DOI:
-
Abstract:
Simulation on the dynamic characteristic of cryogenic fluid pre-cooling pipelines can provide an important reference for the development of cryogenic engine starting scheme.In order to obtain the main characteristics of cryogenic fluid pre-cooling filling, a quasi-one-dimensional model with the finite volume method is established.In this model, the energy equation and the filling rate convection equation are subjected to a spatial one-dimensional solution, while the mass equation and the momentum equation are solved by the lumped parameter method.Then the main influencing factors are analyzed.The study on the influence of different initial temperatures of the pipe wall shows that with the increase of the initial temperature, the pre-cooling time of liquid oxygen on the pipeline gradually increases, the steam pressure build-up time decreases, and the peak of gas pressure increases gradually.Due to the buffering effect of gas, the filling water hammer pressure decreases gradually when the liquid oxygen with low gas content fills the pipeline.The simulation results of liquid oxygen, liquid methane and liquid nitrogen pre-cooling pipelines show that under the same steady-state flow rate, the pre-cooling speed of liquid oxygen is faster, followed by the liquid methane, and then the liquid nitrogen.

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