Role of Wall Shape on the Transition in Axisymmetric Dual-Bell Nozzles
- 1 March 2005
- journal article
- Published by American Institute of Aeronautics and Astronautics (AIAA) in Journal of Propulsion and Power
- Vol. 21 (2), 243-250
- https://doi.org/10.2514/1.6524
Abstract
Dual-bell nozzles represent a possible solution to improve the performance of large liquid rocket engines for launcher first stages. The present paper studies the role of the second bell shape on the side loads that can occur during the transition between the two main operating modes of the nozzle. In particular, the design of the second bell profile is critically discussed on the basis of results obtained from suitable test cases. The analysis of performance and behavior during the transition is carried out by a.validated turbulent Navier-Stokes solver. Geometries were generated by the method of characteristics. Results show that slightly different geometries designed by the method of characteristics yield modest: performance changes but severe differences in behavior during the transition phaseKeywords
This publication has 6 references indexed in Scilit:
- Compressibility Correction for the Spalart-Allmaras Model in Free-Shear FlowsJournal of Spacecraft and Rockets, 2003
- Experimental and Analytical Design Verification of the Dual-Bell ConceptJournal of Propulsion and Power, 2002
- Advanced Rocket NozzlesJournal of Propulsion and Power, 1998
- Analysis of unsteady supersonic viscous flows by a shock-fitting techniqueAIAA Journal, 1996
- Truncated Perfect Nozzles in Optimum Nozzle DesignARS Journal, 1961
- Exhaust Nozzle Contour for Optimum ThrustJournal of Jet Propulsion, 1958