Dankert, C. and Gundlach, G. and Legge, H. and Beck, W. (1992) Temperature Measurement in Hypersonic Flow by LIF. 18th Rarefied Gas Dynamics Symposium (RGD), Vancouver/Canada 26.7.-31.7.92.
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A method for measurement of temperatures and densities in rarefied flow is Laser Induced Fluorescence (LIF) spectroscopy with is applied to reentry simulation of Hermes, Saenger, and the Shuttle in wind tunnels. The strong non-equilibrium of rotational and vibrational temperature is typical of hypersonic wind tunnels due to the rapid expansion in Laval nozzles or free jets. LIF excitation spectra of nitric oxide, NO, were measured in a hot supersonic free jet expansion in the vacuum wind tunnel at Goettingen in a wide density range (10^12 - 10^16 molecules/cm^3). To interpret the experimental results, a computer programm was developed that calculates excitation spectra. By means of the LIF measurements in the free jet flow and in front of a model surface details of the heattransfer can be examined. This is relevant for the gas-surface interaction of reentry vehicles.
|Document Type:||Conference or Workshop Item (Speech)|
|Additional Information:||LIDO-Berichtsjahr=1992, pages=9,|
|Title:||Temperature Measurement in Hypersonic Flow by LIF|
|Keywords:||Laser Induced Fluorescence, Hypersonic Flow, Wind Tunnel, Free Jet Expansion, Rotational Temperature, Nonequilibrium Flows|
|Event Title:||18th Rarefied Gas Dynamics Symposium (RGD), Vancouver/Canada 26.7.-31.7.92|
|HGF - Research field:||UNSPECIFIED|
|HGF - Program:||other|
|HGF - Program Themes:||other|
|DLR - Research area:||UNSPECIFIED|
|DLR - Program:||no assignment|
|DLR - Research theme (Project):||UNSPECIFIED|
|Location:||Köln-Porz , Braunschweig , Göttingen|
|Institutes and Institutions:||Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik > Institut für Experimentelle Strömungsmechanik|
|Deposited By:||elib DLR-Beauftragter|
|Deposited On:||03 Apr 2006|
|Last Modified:||27 Apr 2009 08:07|
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