Navier-Stokes simulation of real gas flows in nozzlesAir flow in a hypersonic nozzle causes real gas effects due to reaction among the species constituting air. Such reactions may be in chemical equilibrium or in chemical nonequilibrium. Here using the CSCM upwind scheme for the compressible Navier-Stokes equations, the real gas flowfield in an arcjet nozzle is computed for both the equilibrium case and the nonequilibrium case. A hypersonic nozzle flow arising from a pebble bed heated plenum is also computed for the equilibrium situation. Between the equilibrium cases, the chemistry is treated by two different schemes and comments are made as to computational complexity. For the nonequilibrium case, a full set of seventeen reactions and full implicit coupling of five species with gasdynamics is employed to compute the flowfield. For all cases considered here the gas is assumed to be a calorically imperfect mixture of ideal gases in thermal equilibrium.
Document ID
19870055091
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Nagaraj, N. (PEDA Corp. Palo Alto, CA, United States)
Lombard, C. K. (PEDA Corp. Palo Alto, CA, United States)