|Table of Contents|

Numerical study on enhanced heat transfer technology ofLOX/CH4engine chamber with ribs(PDF)

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

Issue:
2021年02期
Page:
19-26
Research Field:
研究与设计
Publishing date:

Info

Title:
Numerical study on enhanced heat transfer technology ofLOX/CH4engine chamber with ribs
Author(s):
ZHANG Meng;  SUN Bing
School of Astronautics, Beihang University, Beijing 100191, China
Keywords:
regenerative cooling;  enhanced heat transfer;  numerical simulation;  artificial roughness;  longitudinal rib
PACS:
V434.14
DOI:
-
Abstract:
In order to improve the heat absorption efficiency of coolant in the regenerative cooling channel of LOX/methane engines, and improve the thermal protection ability of the region,three-dimensional steady-state heat transfer coupling simulation of chamber with four different rib arrangements were carried out in this paper. By comparing the results, it can be seen that after adding longitudinal ribs on the gas side wall of the thrust chamber, the actual heat transfer characteristics of the thrust chamber wall can be accurately described by introducing the equivalent average heat flux. Adding artificial roughness reduced the wall temperature by 85.4 K and increased the pressure drop by 0.11 MPa. Adding longitudinal ribs increased the coolant temperature by 24.2 K, but the wall temperature increased by 276.4 K. In addition, although the addition of artificial roughness can promote the heat transfer between the fluids and weaken the temperature stratification of the coolant, the temperature rise of the coolant is not significantly increased because the temperature of the fluid near the bottom of the channel is significantly lower due to the lower wall temperature.

References:

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