Abstract
A physical-chemical model of generation of nonequilibrium molecular radiation in the vacuum ultraviolet (VUV) spectral range behind the shock wave in air for shock wave velocities from 4.5 to 9.5 km/s is developed. Experimental results obtained in a shock tube in investigations of photoionization of air ahead of the shock wave front are used for verification of the numerical model of VUV radiation in the wavelength range from 85 to 105 nm. Model calculations show that nonequilibrium VUV radiation arises in a very thin high-temperature layer behind the shock wave front and is affected by heavy particles and electrons.
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References
D. Bose, E. McCorkle, D. Bogdanoff, and G. Allen (Jr.), “Comparisons of Air Radiation Model with Shock Tube Measurements,” AIAA Paper No. 2009-1030 (2009).
D. Bose, E. McCorkle, C. Thompson, et al., “Analysis and Model Validation of Shock Layer Radiation in Air,” AIAA Paper No. 2008-1246 (2008).
V. A. Gorelov and A. Yu. Kireev, “Nonequilibrium Radiation of the ShockWave in Air in the Vacuum Ultraviolet Range,” Pis’ma Zh. Tekh. Fiz. 38 (24), 46–52 (2012).
V. A. Gorelov and A. Yu. Kireev, “Physical-chemical Model of Formation of Nonequilibrium Radiation of N2 in the Vacuum Ultraviolet Range behind the Shock Wave in Air,” Fiz.-Khim. Kinet. Gaz. Dyn. 15 (1) (2014); http://chemphys.edu.ru/issues/2014-15-1/.
V. A. Gorelov, M. K. Gladyshev, A. Yu. Kireev, et al., “Experimental and Numerical Study of Nonequilibrium Ultraviolet NO and N+2 (1-) Emission in Shock Layer,” J. Thermophys. Heat Transfer 12 (2), 172–180 (1998).
S. T. Surzhikov, Optical Properties of Gases and Plasmas (Bauman Moscow State Technical University, Moscow, 2004) [in Russian].
C. O. Johnston, “Nonequilibrium Shock-Layer Radiative Heating for Earth and Titan Entry,” Diss. Ph. D. (Blacksburg, 2006).
D. C. Cartwright, “Rate Coefficients and Inelastic Momentum Transfer Cross Sections for Electronic Excitation of N2 by Electrons,” J. Appl. Phys. 49 (7), 3855–3862 (1976).
C. O. Laux, “Optical Diagnostics and Radiative Emission of Air Plasmas,” HTLG Rep. Stanford Univ. No. T-288 (Stanford, 1993).
P. V. Marrone and C. E. Treanor, “Chemical Relaxation with Preferential Dissociation from Excited Vibrational Levels,” Phys. Fluids 6 (9), 1215–1221 (1963).
D. Bose and G. V. Candler, “Advanced Model of Nitric Formation in Hypersonic Flows,” J. Thermophys. Heat Transfer 12 (2), 214–222 (1998).
V. A. Kas’yanov and L. I. Podlubnyi, “On the Theory of Dissociative Ionization,” in Proc. Anniversary Conf. of the Moscow Energy Institute, Ser. Phys. (Moscow Energy Institute, Moscow, 1968), pp. 131–141.
B. M. Smirnov, Atomic Collisions and Elementary Processes in the Plasma (Atomizdat, Moscow, 1968) [in Russian].
A. Yu. Kireev, “Vibrational Relaxation of Molecules in the Presence of an Electron Gas,” Uch. Zap. TsAGI 12 (5), 34–39 (1981).
V. A. Gorelov, A. Yu. Kireev, L. A. Kildushova, “Ionization Particularities behind Intensive Shock Waves in Air at Velocities of 8–15 km/s,” AIAA Paper No. 94–2015 (1994).
V. A. Gorelov, A. Yu. Kireev, and S. V. Shilenkov, “Photoionization of Air ahead of the Bow Shock Wave on a Flying Vehicle at Flight Velocities of 6–8 km/s,” Uch. Zap. TsAGI 43 (5), 15–26 (2012).
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Original Russian Text © V.A. Gorelov, A.Yu. Kireev.
Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 57, No. 1, pp. 176–186, January–February, 2016. Original article submitted September 9, 2014; revision submitted February 12, 2015.
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Gorelov, V.A., Kireev, A.Y. Specific features of modeling of nonequilibrium radiation behind the shock wave in air in the vacuum ultraviolet spectral range. J Appl Mech Tech Phy 57, 153–162 (2016). https://doi.org/10.1134/S002189441601017X
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DOI: https://doi.org/10.1134/S002189441601017X