|Table of Contents|

Analysis of design, performance and low-attitude operating boundary of common bell nozzle(PDF)

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

Issue:
2023年05期
Page:
81-90
Research Field:
目次
Publishing date:

Info

Title:
Analysis of design, performance and low-attitude operating boundary of common bell nozzle
Author(s):
LIU Yangmin;  TIAN Yuan;  MA Zhiyu;  DU Ning;  DING Yushuo
(Beijing Aerospace Propulsion Institute, Beijing 100076, China)
Keywords:
bell nozzle;  performance analysis;  flow separation;  numerical simulation
PACS:
V43
DOI:
-
Abstract:
A ground starting nozzle was designed by using the non-rotation characteristic line method and quasi-parabolic formula. Four common bell-shaped nozzles were considered, namely, maximum thrust nozzle, optimal parabolic nozzle, truncated ideal nozzle and compressed truncated ideal nozzle. By using a self-designed and efficient Euler equation coupled boundary layer modified nozzle flow field solver to solve the flow field, the key information of nozzle under the adiabatic condition such as vacuum specific impulse and outlet wall pressure were obtained. Then, the flow separation state of nozzle was calculated by FLUENT software, and the performance and low altitude operating boundary of these four commonly used bell nozzles were compared. The results show that the performance difference of the four types of nozzles is very small under the design condition, but both parabolic nozzle and compressed truncated ideal nozzle can improve the outlet wall pressure by adjusting the shape surface, thereby enlarging the available area ratio of nozzle and improving the specific impulse.

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