A coupled implicit method for chemical non-equilibrium flows at all speeds

Journal Article · Tue Jun 01 00:00:00 EDT 1993 · Journal of Computational Physics; (United States)

DOI:https://doi.org/10.1006/jcph.1993.1110· OSTI ID:5546183

Shuen, J S; Choi, Y ^[1]; Chen, K H ^[2]

---

1. NASA Lewis Research Center, Cleveland, OH (United States)
2. Univ. of Toledo, Cleveland, OH (United States)

A time-accurate, coupled solution procedure is described for the chemical nonequilibrium Navier-Stokes equations over a wide range of Mach numbers. This method employs the strong conservation form of the governing equations, but uses primitive variables (p[sub g], u, v, h, Y[sub i]) as unknowns. Real gas properties and nonequilibrium chemistry are considered. Numerical tests include steady convergent-divergent nozzle flows with air dissociation/recombination chemistry, dump combustor flows with n-pentan air chemistry, and nonreacting unsteady driven cavity flows. Numerical results for both the steady and unsteady flows demonstrate the efficiency and robustness of the present algorithm for Mach numbers ranging from the incompressible limit to supersonic speeds. 26 refs., 10 figs.

• OSTI ID: 5546183
• Journal Information: Journal of Computational Physics; (United States), Vol. 106:2; ISSN 0021-9991
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
ALGORITHMS
EFFICIENCY
INCOMPRESSIBLE FLOW
COMPUTERIZED SIMULATION
NAVIER-STOKES EQUATIONS
NUMERICAL SOLUTION
EQUILIBRIUM
MACH NUMBER
UNSTEADY FLOW
DIFFERENTIAL EQUATIONS
EQUATIONS
FLUID FLOW
MATHEMATICAL LOGIC
PARTIAL DIFFERENTIAL EQUATIONS
SIMULATION
VELOCITY
420400* - Engineering- Heat Transfer & Fluid Flow
990200 - Mathematics & Computers