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Numerical calculation of FSS/RSS transition in highly overexpanded rocket nozzle flows

被引：20
|
作者：
Martelli, Emanuele [1 ]
Nasuti, Francesco [2 ]
Onofri, Marcello [2 ]
机构：
[1] Univ Naples Federico 2, Dip Ing Aerosp & Meccan, I-81031 Aversa, CE, Italy
[2] Univ Roma La Sapienza, Dip Meccan & Aeronaut, I-00184 Rome, Italy
来源：
SHOCK WAVES | 2010年 / 20卷 / 02期
关键词：
Rocket nozzle; Flow separation; Hysteresis; SIDE LOADS; SEPARATION; STARTUP; REGIME;
D O I：
10.1007/s00193-009-0244-4
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Turbulent flow separation in over-expanded rocket nozzles is investigated numerically in a sub-scale parabolic nozzle fed with cold nitrogen. Depending upon the feeding to ambient pressure ratio either a free shock separation or a restricted shock separation is computed, with a significant hysteresis between these two flow regimes. This hysteresis was also found in experimental tests with the same nozzle geometry. The present study is mainly focused on the transition between the two shock separation patterns. The analysis of the numerical solutions aims to provide clues for the explanation of the hysteresis cycle.
引用
收藏
页码：139 / 146
页数：8
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