Influence of Base Nozzle Contour Design on Flow Instabilities in Dual Bell Nozzle at Low Altitude Operation

2011 ◽  
Author(s):  
Koichi Yonezawa ◽  
Dzianis Proshchanka ◽  
Kasumi Araki ◽  
Hiroaki Tsukuda ◽  
Yoshinobu Tsujimoto ◽  
...  
Keyword(s):  
Flow Instabilities ◽  
Nozzle Contour ◽  
Low Altitude ◽  
Contour Design ◽  
Dual Bell

Jet Oscillation at Low-Altitude Operation Mode in Dual-Bell Nozzle

2012 ◽  
Vol 28 (5) ◽  
pp. 1071-1080 ◽  
Author(s):  
Dzianis Proschanka ◽  
Yonezawa Koichi ◽  
Hiroaki Tsukuda ◽  
Kasumi Araki ◽  
Yoshinobu Tsujimoto ◽  
...  
Keyword(s):  
Operation Mode ◽  
Low Altitude ◽  
Dual Bell ◽  
Jet Oscillation

scholarly journals Characteristics Analysis of Dual Bell Nozzle using Computational Fluid Dynamics

2019 ◽  
Vol 4 (1) ◽  
pp. 15-21 ◽  
Author(s):  
Yeasir Mohammad Akib ◽  
Asif Kabir ◽  
Mahdi Hasan
Keyword(s):  
Imaging Technique ◽  
Space Exploration ◽  
Ansys Fluent ◽  
Space Tourism ◽  
Nozzle Contour ◽  
Different Types ◽  
Characteristics Analysis ◽  
Flow Through ◽  
Developed Nations ◽  
Dual Bell

Space exploration and space tourism have now become a raging competition among the developed nations. For this reason, different types of advanced rocket nozzles with prospective privileges are introduced. Altitude adaptive dual bell nozzle will soon replace the conventional nozzles for the first stage rocket launcher. Indeed, this nozzle has auto adaption capability based on altitude. The major feature of a dual bell nozzle is the two bell-shaped contours separated by an inflection point. This nozzle has left rooms for researchers to test different flight conditions and transition characteristics. In this paper, a dual bell nozzle contour has been developed in MATLAB and analysed for different thermodynamic parameters. ANSYS Fluent is used in analysing flow through the nozzle. Shadowgraph imaging technique is used for measuring density gradient and compared it with fluent results. The simulations were performed by using the k-epsilon turbulence model.

1310 A Numerical Study of the effects of Dual-Bell Nozzle contour on and Specific Impulse

2004 ◽  
Vol 2004.79 (0) ◽  
pp. _13-19_-_13-20_
Author(s):  
Yukinori YAMASHITA ◽  
Koichi YONEZEWA ◽  
Yoshinobu TUJIMOTO
Keyword(s):  
Numerical Study ◽  
Specific Impulse ◽  
Nozzle Contour ◽  
Dual Bell

scholarly journals Flow Oscillation in Dual-Bell Nozzle at Low-Altitude Operation

2012 ◽  
Vol 60 (1) ◽  
pp. 24-30
Author(s):  
Dzianis PROSHCHANKA ◽  
Koichi YONEZAWA ◽  
Hiroaki TSUKUDA ◽  
Kasumi ARAKI ◽  
Tatsuya KIMURA ◽  
...  
Keyword(s):  
Flow Oscillation ◽  
Low Altitude ◽  
Dual Bell

Investigation of conjugate circular arcs in rocket nozzle contour design

Shock Waves ◽  
2018 ◽  
Vol 29 (3) ◽  
pp. 401-413
Author(s):  
K. Schomberg ◽  
J. Olsen ◽  
A. Neely ◽  
G. Doig
Keyword(s):  
Rocket Nozzle ◽  
Circular Arcs ◽  
Nozzle Contour ◽  
Contour Design

scholarly journals Dual-Bell Nozzle Design

2020 ◽  
pp. 395-406
Author(s):  
Chloé Génin ◽  
Dirk Schneider ◽  
Ralf Stark
Keyword(s):  
Flow Behavior ◽  
Research Field ◽  
Wake Flow ◽  
Nozzle Geometry ◽  
German Research Foundation ◽  
Thrust Chamber ◽  
Transition Prediction ◽  
Firing Test ◽  
Nozzle Contour ◽  
Dual Bell

Abstract The dual-bell nozzle is an altitude adaptive nozzle concept that offers two operation modes. In the framework of the German Research Foundation Special Research Field SFB TRR40, the last twelve years have been dedicated to study the dual-bell nozzle characteristics, both experimentally and numerically. The obtained understanding on nozzle contour and inflection design, transition behavior and transition prediction enabled various follow-ups like a wind tunnel study on the dual-bell wake flow, a shock generator study on a film cooled wall inflection or, in higher scale, the hot firing test of a thrust chamber featuring a film cooled dual-bell nozzle. A parametrical system study revealed the influence of the nozzle geometry on the flow behavior and the resulting launcher performance increase.

Design Criterion of the Dual-Bell Nozzle Contour

2005 ◽  
Author(s):  
Hirotaka Otsu ◽  
Masafumi Miyazawa ◽  
Yasunori Nagata
Keyword(s):  
Design Criterion ◽  
Nozzle Contour ◽  
Dual Bell
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