Decoupled predictions of radiative heating in air using a particle simulation methodA particle simulation technique with decoupled radiation is used to estimate the radiative emission along the stagnation streamline and the radiative heating at the stagnation point of a blunt-nosed vehicle entering the earth's atmosphere at hypersonic speed. The direct simulation Monte Carlo (DSMC) method is used to compute the fluid mechanics of the weakly ionized flow. The radiative emission is computed using the NEQAIR computer code with the radiation decoupled from the flowfield solution. It is concluded that the new models make it possible to decrease the predicted total radiative heating at the stagnation point of the vehicle by a factor of 15. A comparison of the DSMC approach with a continuum flow model shows that the total predicted radiative heating estimates agree within a factor of 2.
Document ID
19920064362
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Boyd, Iain D. (NASA Ames Research Center Moffett Field, CA, United States)
Whiting, Ellis E. (Eloret Institute, Palo Alto; NASA, Ames Research Center Moffett Field, CA, United States)