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Experimental and numerical analysis of the structure of pseudo-shock systems in laval nozzles with parallel side walls

Gawehn, T. and Gülhan, A. and Al-Hasan, N. S. and Schnerr, G. H. (2010) Experimental and numerical analysis of the structure of pseudo-shock systems in laval nozzles with parallel side walls. Shock Waves, 20 (4), pp. 297-306. Springer. DOI: 10.1007/s00193-010-0263-1 ISSN 0938-1287

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Official URL: http://dx.doi.org/10.1007/s00193-010-0263-1

Abstract

Detailed numerical and experimental investigations of pseudo-shock systems in a Laval nozzle with parallel side walls are carried out. The location of the pseudo-shock system is defined in this system of two choked Laval nozzles by the ratio of the critical cross sections A2*/A1*, the stagnation pressure loss across the shock system and viscous losses. The wall pressure distributions and high-speed schlieren videos recorded in the experiments are compared to the results of a steady and an unsteady numerical simulation. For the steady case, good agreement is found between the calculated and measured shock structure and pressure distribution along the primary nozzle wall, except for a remaining slight deviation in the shock position. For the unsteady case, in which asymmetric shock configurations are observed, deviations of the results with respect to the stochastic wall attachment of the shock system are given which indicate the necessity of further investigations on that topic.

Item URL in elib:https://elib.dlr.de/66998/
Document Type:Article
Title:Experimental and numerical analysis of the structure of pseudo-shock systems in laval nozzles with parallel side walls
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gawehn, T.UNSPECIFIEDUNSPECIFIED
Gülhan, A.UNSPECIFIEDUNSPECIFIED
Al-Hasan, N. S.TU MünchenUNSPECIFIED
Schnerr, G. H.TU MünchenUNSPECIFIED
Date:3 July 2010
Journal or Publication Title:Shock Waves
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:20
DOI :10.1007/s00193-010-0263-1
Page Range:pp. 297-306
Publisher:Springer
ISSN:0938-1287
Status:Published
Keywords:Pseudo-shock system, Laval nozzle, Double choked, Shock boundary layer interaction, Secondary flow, CFD, Shock train
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignment
DLR - Program:no assignment
DLR - Research theme (Project):no assignment
Location: Köln-Porz
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Supersonic and Hypersonic Technology
Deposited By: Gawehn, Dr.-Ing. Thomas
Deposited On:15 Dec 2010 14:56
Last Modified:10 Jan 2019 15:50

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