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Analysis of gap influence on pseudo-shock system asymmetry in rectangular Laval nozzles

Gawehn, Thomas and Gülhan, Ali and Giglmaier, Marcus and Quaatz, Jan Frederik and Adams, N.A. (2012) Analysis of gap influence on pseudo-shock system asymmetry in rectangular Laval nozzles. 20th International Shock Interaction Symposium, August 20-24, 2012, Stockholm, Sweden.

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A pseudo-shock system in a rectangular nozzle with parallel side walls is investigated at different pre-shock Mach numbers by means of wall pressure measurements and high-speed schlieren visualization. In detail, we analyze the effect of small streamwise gaps (Δz = O(10^-4) m) between constructional elements. An asymmetrical pseudo-shock system is observed for a gap-free configuration whereas configurations including small gaps show a symmetric behavior. Furthermore, the internal structure of the entire pseudo-shock system visibly changes by increasing the gap width. A detailed analysis of pressure measurements as well as high speed schlieren images is shown and possible explanations are discussed.

Document Type:Conference or Workshop Item (Speech)
Title:Analysis of gap influence on pseudo-shock system asymmetry in rectangular Laval nozzles
AuthorsInstitution or Email of Authors
Giglmaier, MarcusTU München
Quaatz, Jan FrederikTU München
Adams, N.A.TU München
Date:August 2012
Keywords:pseudo-shock system, shock asymmetry, longitudinal gaps
Event Title:20th International Shock Interaction Symposium
Event Location:Stockholm, Sweden
Event Type:international Conference
Event Dates:August 20-24, 2012
Organizer:KTH Royal Institute of Technology
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - Raumfahrzeugsysteme - Anlagen u. Messtechnik
Location: Köln-Porz
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Über- und Hyperschalltechnologien
Deposited By: Dr.-Ing. Thomas Gawehn
Deposited On:06 Nov 2012 08:38
Last Modified:22 Nov 2012 16:32

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