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Design and experimental analysis of tile-shaped aerospike nozzles(PDF)

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

Issue:
2008年01期
Page:
1-6
Research Field:
研究与设计
Publishing date:

Info

Title:
Design and experimental analysis of tile-shaped aerospike nozzles
Author(s):
Wang Yibai; Liu Yu; Qin Lizi
School of Astronautics，Beijing University of Aeronautics and Astronautics，Beijing 100083，China
Keywords:
tile-shaped aerospike nozzle; contour design; cold—-flow experiment; base bleed
PACS:
V434
DOI:
-
Abstract:
Simple design methods of the tile-shaped aerospike nozzle with the axisymmetric thrust cell and the concave plug were presented，and the two-module experimental models were designed． The area ratio of internal nozzle is 5．8 1 and the total area ratios of the aerospike models are 24．36，29．43，33．88 and 37．58．Cold-flow tests on the tile-shaped models were carried out using hig}lly pressurized air．The effects of the variations of the inclination ansle and the amount of base bleed on the performance and the base pressure were examined in the tests．Test apparatus，struc-tures photographs and design parameters of the main parts of the experimental engine were introduced． Chamber pressure，thrust and ambient pressure were acquired and the data analyses were al- 80 delivered．It is shown that good altitude compensation capacities and hi【gh efficiencies were obtained in the tests．The maximum nozzle thrust efficiency of the tile-shaped nozzles tested here is 96％．The base pressure increases when the inclination ansle becomes bigger and there is an optimum tingle for the optimum performance．The bleed Call increase the base pressure，the effect of bleed on the performance is within 1％-2％and a little bleed can improve the performance effectivly． The effects’of base sidewalls on base pressure were also analyzed．The results indicate that whether the base pressure changes with the ambient backpressure or not depends on the base region is working at open or closed condition．

References:

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Last Update: 1900-01-01