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Flow Separation and Side-Loads in Rocket Nozzles

Hagemann, G. and Terhardt, M. and Frey, M. and Reijasse, P. and Onofri, M. and Nasuti, F. and Östlund, J. (2000) Flow Separation and Side-Loads in Rocket Nozzles. In: Fourth International Symposium on Liquid Space Propulsion - Scientific Progress in the Service of Space Access at the Beginning of the Third Millennium -. 4th International Symposium on Space Propulsion, Heilbronn, March 13-15, 2000.

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Abstract

During the transient start-up of a rocket engine operating against an ambient pressure, the exhaust flow separates from the nozzle wall at a certain pressure ratio of wall pressure to ambient pressure. Furthermore, if the chamber pressure at nominal operation condition is not high enough to reach full flowing in overexpanded flow condition, flow separation will occur even for steady state operation Flow separation is a strongly three-dimensional instationary process, and lateral forces may be generated, the so called side-loads. The physical origins of flow separation and side-loads and its theoretical prediction have been the key objectives for several experimental and theoretical studies in the past decades. This paper addresses the physical background of flow separation and side-loads, and gives an overview on the state-of-the-art prediction for both phenomena.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2000,
Title:Flow Separation and Side-Loads in Rocket Nozzles
Authors:
AuthorsInstitution or Email of Authors
Hagemann, G.DASA
Terhardt, M.DASA
Frey, M.UNSPECIFIED
Reijasse, P.ONERA
Onofri, M.Università di Roma
Nasuti, F.Università di Roma
Östlund, J.VAC
Date:2000
Journal or Publication Title:Fourth International Symposium on Liquid Space Propulsion - Scientific Progress in the Service of Space Access at the Beginning of the Third Millennium -
Status:Published
Event Title:4th International Symposium on Space Propulsion, Heilbronn, March 13-15, 2000
Organizer:Deutsches Zentrum für Luft- und Raumfahrt (DLR), Raumfahrtantriebe, Lampoldshausen
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):E -- no assignement
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:06 Jan 2010 13:50

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