A laser induced fluorescence system for the high enthalpy shock tunnel (HEG) in Göttingen
| Autor: | Jürgen Troe, P. Andresen, T. Seelemann, A. Riedl, G. Eitelberg, H. Hippler, T. J. McIntyre, W. H. Beck |
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| Rok vydání: | 1992 |
| Předmět: |
Shock wave
Quenching Argon 010304 chemical physics Aerodynamic heating Expansion tunnel Analytical chemistry chemistry.chemical_element 010402 general chemistry 01 natural sciences Temperature measurement 0104 chemical sciences Shock (mechanics) chemistry 0103 physical sciences Atomic physics Shock tube |
| Zdroj: | Shock Waves ISBN: 9783642776502 |
| DOI: | 10.1007/978-3-642-77648-9_103 |
| Popis: | It is planned to use the LIF technique to examine the gas flows around models located in the test section of the high enthalpy shock tunnel (HEG) in Gottingen, at present nearing the end of construction. The technique will be used to measure concentrations of NO (in 2D) and O atoms (ID) and to obtain a measure of an NO internal temperature. A complex automated apparatus consisting of two lasers and image capturing systems has been constructed and is described here. This system is at present undergoing tests in a heated cell, and will be further tested in other wind/shock tunnels before its installation at HEG in early 1992. Preliminary test results from the heated cell are presented - a spectral analysis of NO and a temperature determination. The role of quenching in applying the LIF technique to HEG gas flows (which are not in chemical equilibrium) is discussed. An ongoing study in the shock tube laboratory of the University of G#x00F6;ttingen addresses this problem; quenching of NO is being examined behind a shock wave. Results for quenching with argon are presented here. |
| Databáze: | OpenAIRE |
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