Abstract
Radiative heat transfer from a strong shock layer over a hypersonic flight vehicle is experimentally investigated using a ballistic range facility. A plastic projectile of 1.2 cm diameter is accelerated in this facility up to 5.3 km/s (M =15), and the radiation spectra and global power emission from the launched projectile are measured. As a result, the radiant intensity from the shock layer became approximately 300 W/m2sr, and the carbon radiation spectra were observed along with the air spectra. In order to take account of model-dimension effects of the projectile, which is two orders of magnitude smaller than the actual size of the vehicles, a scaling law has been developed by analytical and numerical considerations. The computed results are compared with the measured ones, and the validity of the calculation model including the wall condition is discussed.
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Abbreviations
- L :
-
shock layer thickness or shock stand-off distance, m
- M :
-
Mach number
- [M]:
-
total mole density, mole/m3
- p :
-
pressure, Pa
- R :
-
nose radius of the blunt body, m
- T, T v :
-
translational and vibrational temperature, K
- T a :
-
geometric average temperature, K
- u :
-
local flow velocity, m/sec
- δ T :
-
thermal boundary thickness, m
- λ V , λ R :
-
vibrational-relaxation distance and reaction distance, m
- T V , T R :
-
vibrational-relaxation time and reaction time, sec
- ρ :
-
density, kg/m3
References
Chang H, Hemmi M, Komurasaki K, Fujiwara T (1993), Radiation measurement by using a ballistic range. AIAA Paper 93–0635, Reno, Nevada
Murayama T, Sasoh A, Fujiwara T (1991) Chemical and thermal processes in a hypersonic shock layer. In: Takayama, K. (ed) Proc 18th ISSW, Sendai, pp 691–696
Park C (1984) Calculation of nonequilibrium radiation in AOTV flight regimes. AIAA Paper 84–0306
Park C (1991) Chemical-kinetic problems of future NASA missions. 1. Earth entries: a review. AIAA Paper 91–0464, Reno, Nevada
Sasoh A, Chang X, Murayama T, Fujiwara T (1991) Radiative heat transfer from non-equilibrium high-enthalpy shock layers. In: Takayama, K. (ed) Proc 18th ISSW, Sendai, pp. 723–726
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© 1995 Springer-Verlag Berlin Heidelberg
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Komurasaki, K., Kasahara, J., Yano, S., Fujiwara, T. (1995). Radiative Heat Transfer from a Shock Layer Generated around a Projectile Launched in a Ballistic Range. In: Brun, R., Dumitrescu, L.Z. (eds) Shock Waves @ Marseille I. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-78829-1_20
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DOI: https://doi.org/10.1007/978-3-642-78829-1_20
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-78831-4
Online ISBN: 978-3-642-78829-1
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