|Table of Contents|

Design and numerical analysis of segmental nozzle with high area ratio(PDF)

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

Issue:
2013年01期
Page:
19-23
Research Field:
研究与设计
Publishing date:

Info

Title:
Design and numerical analysis of segmental nozzle with high area ratio
Author(s):
DING Zhao-bo
Beijing Aerospace Propulsion Institute, Beijing 100076, China
Keywords:
high area ratio;  segmental;  single-wall nozzle;  secondary flow;  cool
PACS:
V434-34
DOI:
-
Abstract:
To meet the needs of the nozzle with high area ratio for large thrust upper-stage engine, a segmental design scheme for the nozzle is adopted, whose forepart is cooled by dump-cooling mode and end-piece by single-wall radiation cooling mode. Based on the heat transfer calculation of the dump-cooled forepart, the cooling characteristics and efficiency of single-wall end-piece with se- condary flow was mainly studied. Numerical simulation of flow field shows that the high area ratio nozzle is feasible for single-wall metal nozzle extension (NE) with secondary flow. It is hopeful to protect the nozzle wall, and improve the nozzle efficiency. The interaction between secondary flow and main stream is analyzed.

References:

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Last Update: 1900-01-01