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 Berlin / Heidelberg. 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
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.
|Title:||Experimental and numerical analysis of the structure of pseudo-shock systems in laval nozzles with parallel side walls|
|Date:||3 July 2010|
|Journal or Publication Title:||Shock Waves|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 297-306|
|Publisher:||Springer Berlin / Heidelberg|
|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 assignement|
|DLR - Program:||no assignment|
|DLR - Research theme (Project):||other|
|Institutes and Institutions:||Institute of Aerodynamics and Flow Technology > Supersonic and Hypersonic Technology|
|Deposited By:||Dr.-Ing. Thomas Gawehn|
|Deposited On:||15 Dec 2010 14:56|
|Last Modified:||07 Feb 2013 20:43|
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