Computational methodology for radiation heat transfer in the flowfield of an AOTVA computational methodology is developed for the calculation of radiation heat transfer in a non-scattering medium where nonequilibrium conditions exist and give rise to complex spectra. The specific problem of radiation in an aeroassisted orbital transfer vehicle (AOTV) flowfield is addressed. Nonequilibrium radiation from the gases around a hypersonic vehicle is evaluated using the NASA-Ames NEQAIR program together with a three-dimensional geometrical flowfield model. Nonequilibrium compositions and temperatures are taken from NASA-Langley 3-D hypersonic flowfield calculations that include real-gas effects and finite-rate chemical kinetics. It is shown that the concept of a transmission path adjustment, together with precomputations of curves of growth based upon local properties at flowfield locations, facilitates radiation calculations. Sample calculations of directional and spectral distributions of gas radiation received upon a hypersonic vehicle are presented.
Document ID
19910058846
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Fuehrer, P. L. (California Univ. Irvine, CA, United States)
Edwards, D. K. (California, University Irvine, United States)
Babikian, D. S. (Eloret Institute Palo Alto, CA, United States)