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Particle dynamics in a shock layer produced by a supersonic jet impinging on a plate

Klinkov, K. V. and Rein, M. (2004) Particle dynamics in a shock layer produced by a supersonic jet impinging on a plate. 75th Annual Scientific Conference of the Gesellschaft für Angewandte Mathematik und Mechanik, Dresden, March 21-27, 2004.

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Abstract

Particle laden supersonic flows impinging on obstacles are important for both, erosion and deposition processes. In order to obtain an understanding of important mechanisms of such processes the present study aims to investigate the dynamics of individual particles in the shock layer formed by a supersonic two-phase jet impinging normally onto a plate. For this purpose the method of high-speed multiexposure visualization of flow fields was applied. The free jet studied was characterized by Mach numbers of 2.6-2.8 and stagnation temperatures of 300-500 K. The disperse phase consisted of solid particles of different densities (2700-7900 kg/m3) and sizes (10-100 ƒÝm). The particles were injected into the flow ahead of the nozzle throat. In the optical diagnostics a series of light pulses was produced by a semiconductor laser. The duration of single pulses was very short (100 ns-10 ƒÝs) and the interval between different pulses lies in the range of 100 ns ¡V 1 ms. Particles impinging on the plate can be reflected. Results relating to the influence of reflected particles on the characteristics of the shock structure formed ahead of the plate will be addressed. Furthermore, particle dynamics, in particular, the formation of a cloud of particles within the shock layer will be discussed and related to a particular deposition mode observed in a coating process.

Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=2004,
Title:Particle dynamics in a shock layer produced by a supersonic jet impinging on a plate
Authors:
AuthorsInstitution or Email of Authors
Klinkov, K. V.UNSPECIFIED
Rein, M.UNSPECIFIED
Date:2004
Page Range:p. 182
Status:Published
Keywords:particle-laden flows, transonic flows, supersonic free jet
Event Title:75th Annual Scientific Conference of the Gesellschaft für Angewandte Mathematik und Mechanik, Dresden, March 21-27, 2004
Organizer:Gesellschaft für Angewandte Mathematik und Mechanik
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: elib DLR-Beauftragter
Deposited On:31 Jan 2006
Last Modified:14 Jan 2010 19:34

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