Application of particle image velocimetry and the background-oriented schlieren technique in the high-enthalpy shock tunnel Göttingen

The applicability of the particle image velocimetry (PIV) and the background-oriented schlieren (BOS) techniques in the high-enthalpy shock tunnel Göttingen of the German Aerospace Center, DLR is demonstrated. As a part of this feasibility study two different experiments are performed. The velocity field past a wedge in a Mach 6 flow at a total specific enthalpy of 1.5 MJ/kg is determined by means of PIV and the results are compared to numerical predictions. The BOS technique is applied to investigate the density field in the shock layer of a sphere at 12 and 22 MJ/kg total specific enthalpies. Using a ray tracer method, the BOS results are compared to the data obtained by corresponding numerical computations.

[1]  Erik Goldhahn,et al.  The background oriented schlieren technique: sensitivity, accuracy, resolution and application to a three-dimensional density field , 2007 .

[2]  F. Scarano,et al.  Evaluation of aero-optical distortion effects in PIV , 2005 .

[3]  Anurag Sharma,et al.  Tracing rays through graded-index media: a new method. , 1982, Applied optics.

[4]  Wolfgang Nitsche,et al.  New Results in Numerical and Experimental Fluid Mechanics , 1999 .

[5]  Christian Willert,et al.  Particle image velocimetry : new developments and recent applications , 2008 .

[6]  Markus Raffel,et al.  Particle Image Velocimetry: A Practical Guide , 2002 .

[7]  Jürgen Kompenhans,et al.  Particle Image Velocimetry - A Practical Guide (2nd Edition) , 2007 .

[8]  Klaus Hannemann,et al.  High Enthalpy Cylinder Flow in HEG: A Basis for CFD Validation , 2003 .

[9]  Andreas Mack,et al.  Validation of the Unstructured DLR-TAU-Code for Hypersonic Flows , 2002 .

[10]  G. Meier,et al.  Density measurements using the Background Oriented Schlieren technique , 2004 .

[11]  G. Settles.  Schlieren and shadowgraph techniques , 2001 .

[12]  Fulvio Scarano,et al.  Application of PIV in a Mach 7 double-ramp flow , 2006 .

[13]  John Foss,et al.  Springer Handbook of Experimental Fluid Mechanics , 2007 .

[14]  Klaus Hannemann,et al.  High Speed Flow Visualization at HEG , 2004 .

[15]  Jürgen Kompenhans,et al.  Application of Quantitative Background Oriented Schlieren (BOS): Investigation of a Wing Tip Vortex in a Transonic Wind Tunnel , 2003 .

[16]  Christian Rey,et al.  PIV Measurements in Shock Tunnels and Shock Tubes , 2007 .

[17]  Klaus Hannemann,et al.  High Enthalpy Flows in the HEG Shock Tunnel: Experiment and Numerical Rebuilding (Invited) , 2003 .

[18]  Klaus Hannemann,et al.  Time resolved holographic interferometry for short duration hypersonic high enthalpy test facilities , 2005 .

[19]  Peter A. Jacobs,et al.  Background oriented schlieren for flow visualisation in hypersonic impulse facilities , 2007 .

[20]  Klaus Hannemann,et al.  Recent Extensions to the High Enthalpy Shock Tunnel Göttingen (HEG , 2008 .