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Numerical and experimental investigation of the effect of bypass mass flow due to small gaps in a transonic channel flow

Giglmaier, Marcus and Quaatz, Jan Frederik and Gawehn, Thomas and Gülhan, Ali and Adams, Nikolaus A. (2011) Numerical and experimental investigation of the effect of bypass mass flow due to small gaps in a transonic channel flow. 28th International Symposium on Shock Waves, 17 - 22 July 2011, Manchester (UK).

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Abstract

In order to perform Schlieren visualizations of transonic nozzle flows, quartz glass windows are mounted on both side walls of the test section. However, to avoid strong stresses within the glass, these windows cannot be flush mounted to the facility.Thus, small gaps of delta x = O(10-4) m occur between the glass side walls and the metal contour. During a previous investigation we observed that these gaps result in a small bypass mass flow that affects the pressure distribution within the supersonic part of the Laval nozzle as well as the shock location. The focus of the present study is put on detailed numerical analysis of the flow within the gaps and its feedback on the transonic base flow within a slender nozzle.

Document Type:Conference or Workshop Item (Paper)
Title:Numerical and experimental investigation of the effect of bypass mass flow due to small gaps in a transonic channel flow
Authors:
AuthorsInstitution or Email of Authors
Giglmaier, MarcusTU München
Quaatz, Jan FrederikTU München
Gawehn, ThomasAS-HY
Gülhan, AliAS-HY
Adams, Nikolaus A.TU München
Date:July 2011
Status:Published
Keywords:Laval Nozzle Flow, Pseudo-shock system, Shock train, Gap influence
Event Title:28th International Symposium on Shock Waves
Event Location:Manchester (UK)
Event Type:international Conference
Event Dates:17 - 22 July 2011
Organizer:The University of Manchester, Aero-Physics Laboratory
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignement
DLR - Program:no assignment
DLR - Research theme (Project):other
Location: Köln-Porz
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Supersonic and Hypersonic Technology
Deposited By: Dr.-Ing. Thomas Gawehn
Deposited On:04 Oct 2011 07:32
Last Modified:04 Oct 2011 07:32

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