|Table of Contents|

Optimization for calculation method of gas convective heat transfer coefficient inside regeneratively-cooled chamber(PDF)

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

Issue:
2018年01期
Page:
22-26
Research Field:
研究与设计
Publishing date:

Info

Title:
Optimization for calculation method of gas convective heat transfer coefficient inside regeneratively-cooled chamber
Author(s):
WU Youliang;  ZHANG Chengyin;  PAN Hao;  LI Qiang;  CHENG Shengqing
Beijing Aerospace Propulsion Institute, Beijing 100076, China
Keywords:
LOX/methane engine;  regenerative cooling;  heat transfer;  Bartz equation
PACS:
V434-34
DOI:
-
Abstract:
The gas convective heat transfer coefficient inside the liquid rocket engine combustion chamber is usually evaluated by using the Bartz equation. As the Bartz equation does not take account the influence of combustion zone distribution in the thrust chamber, thickness variation of the boundary layer and other actual situations on fuel gas heat flux, it can not well present the gas heat flux density distribution inside combustion chamber, especially in the combustion zone near the injector. It is not fit well with the results of the experiments. In this paper, a modified Bartz equation is introduced. This modified Bartz equation take account the effects of combustion zone distribution, thickness variation of the boundary layer and flow acceleration in nozzle. The modified method of Bartz equation is determined. Pavli equation was used to evaluate the gas heat transfer coefficient. The comparison results show that the result calculated by the modified Bartz equation is fit well with the result of LOX/methane thrust chamber experiment. The modified Bartz equation was used to analyze the effect of the chamber pressure and mixture ratio on regeneratively-cooled chamber performance.

References:

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