Energetics of gas-surface interactions in transitional flows at entry velocitiesThe direct simulation Monte Carlo (DSMC) method has been used to calculate the molecular velocity and energy distributions of molecules striking a surface after traversing a shock layer in hypersonic transitional flow. The calculations were performed for a 1.6-m-diameter sphere at a nominal velocity for re-entry of 7.5 km/s over an altitude range of 130 to 90 km. Real gas effects and chemical reactions were included in the DSMC simulations. Results are presented for these conditions and the need for gas-surface interaction experiments is discussed.
Document ID
19910058784
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wilmoth, R. G. (NASA Langley Research Center Hampton, VA, United States)
Moss, J. N. (NASA Langley Research Center Hampton, VA, United States)
Dogra, V. K. (Vigyan Research Associates, Inc. Hampton, VA, United States)