Abstract
Absolute intensity measurements of impurity emissions in a shock tunnel nozzle flow are presented. The impurity emission intensities were measured with a photomultiplier and optical multichannel analyser and calibrated against an intensity standard. The various metallic contaminants were identified and their intensities measured in the spectral regions 290 to 330 nm and 375 to 385 nm. A comparison with calculated fluorescence intensities for predissociated laser-induced fluorescence signals is made. It is found that the emission background is negligible for most fluorescence experiments.
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Allison AC, Dalgarno A, Pasachoff NW (1971) Absorption by vibrationally excited molecular oxygen in the Schumann-Runge continuum. Planet Space Sci 19:1463–1473
Andresen P, Bath A, Gröger W, Lülf HW, Meijer G, ter Meulen JJ (1988) Laser-induced fluorescence with tunable excimer lasers as a possible method for instantaneous temperature field measurements at high pressures: checks with an atmospheric flame. Appl Opt 27:365–378
East RA, Stalker RJ, Baird JP (1980) Measurements of heat transfer to a flat plate in a dissociated high-enthalpy laminar flow. J Fluid Mech 97:673–699
Hornung HG (1992) personal communication
Hornung HG, Sandeman RJ (1974) Interferometric measurements of radiating ionising argon flow over blunt bodies. J Phys D 7:920–934
Huber KP, Heraberg G (1979) Constants of diatomic molecules. Van Nostrand-Reinhold, New York
Kilpin D, Metal vapour contamination in high temperature shocks. To be published
Kim GS, Hitchcock LM, Rothe EW, Reck GP (1991) Identification and imaging of hot O2 (n″=2, 3, or 4) in hydrogen flames using 193 nm and 210 nm-range light. Appl Phys B 53:180–186
Lee MP, Hanson RK (1986) Calculations of O2 absorption and fluorescence at elevated temperatures for a broadband argon-fluoride laser source at 193 nm. J Quant Spectrosc Radiat Transfer 36:425–440
Lewis BR, Berzins L, Carver JH, Gibson ST (1986) Rotational variation of predissociation linewidth in the Schumann-Runge bands of16O2. J Quant Spectrosc Radiat Transfer 36:187–207
Meier UE, Raiche GA, Crosley DR, Smith GP, Eckstrom DJ (1991) Laser-induced fluorescence decay lifetimes of shock-heated NO(A 2 Σ +). Appl Phys B 53:138–141
Palmer JL, McMillin BK, Hanson RK (1992) Planar laser-induced fluorescence imaging of velocity and temperature in shock tunnel free jet flow. AIAA Paper 92–0762
Paul PH, Lee MP, Hanson RK (1989) Molecular velocity imaging of supersonic flows using pulsed planar laser-induced fluorescence of NO. Opt Lett 14:417–419
Pulford DRN, Newman DS, Houwing AFP, Sandeman RJ (1992) Coherent anti-stokes raman spectroscopy in a high enthalpy pulsed facility. IUTAM Symposium Marseille — Aerothermochemistry of Spacecraft and Associated Hypersonic Flows
Smith CE (1966) The starting process in a hypersonic nozzle. J Fluid Mech 24:625–640
Stalker RJ (1970) Shock tube developments at the Australian National University. Aust Physicist 7:99–102
Stalker RJ (1972) Development of a hypervelocity wind tunnel. Aero J of Roy Aero Soc 76:374–384
Stalker RJ, Morgan RG (1984) Supersonic hydrogen combustion with a short thrust nozzle. Combust Flame 57:55–70
Stalker RJ, Morgan RG, Netterfield MP (1988) Wave processes in SCRAMJET thrust generation. Combust. Flame 71:63–77
Sutton DJ, Houwing AFP, Palma PC, Sandeman RJ, Vibrational temperature measurements in a shock layer using laser induced predissociation fluorescence. Submitted to Shock Waves
Tatum JB (1966) Hönl-London factors for3 Σ ± →3 Σ ± transitions. Can J Phys 44:2944–2946
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Palma, P.C., Houwing, A.F.P. & Sandeman, R.J. Absolute intensity measurements of impurity emissions in a shock tunnel and their consequences for laser-induced fluorescence experiments. Shock Waves 3, 49–53 (1993). https://doi.org/10.1007/BF01414747
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DOI: https://doi.org/10.1007/BF01414747