Gas-Kinetic Navier-Stokes Solver for Hypersonic Flows in Thermal and Chemical Non-Equilibrium

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$99,955.00
Award Year:
2007
Program:
SBIR
Phase:
Phase I
Contract:
NNL07AA84P
Award Id:
83898
Agency Tracking Number:
065705
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
3409 N. 42nd Place, Phoenix, AZ, 85018
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
781820258
Principal Investigator:
Lei Tang
Principal Investigator
(480) 518-0981
tangl69@hotmail.com
Business Contact:
Lei Tang
President
(480) 518-0981
tangl69@hotmail.com
Research Institute:
n/a
Abstract
This SBIR project proposes to develop a gas-kinetic Navier-Stokes solver for simulation of hypersonic flows in thermal and chemical non-equilibrium. The Navier-Stokes solvers adopted in current hypersonic CFD codes like LAURA and GASP use Riemann solver for the convection part and central scheme for the diffusion part. As a result, their integration with DSMC in the transitional and rarefied flow regimes may cause an artificial flow across the interface between CFD/DSMC zones because of the inconsistency in the estimated fluxes. On the other hand, the proposed gas-kinetic BGK solver for the Navier-Stokes equations (BGK-NS) computes the inviscid and viscous fluxes as a single entity, consistent with the DSMC approach. Furthermore, this BGK-NS solver has been demonstrated very accurate for hypersonic heat transfer prediction. The approach has also been successfully extended for solution of the Burnett equations whereas the macroscopic Burnett approach has some numerical difficulties. This SBIR project will further extend this BGK-NS solver to hypersonic flows in thermal and chemical non-equilibrium. In Phase I, a prototype non-equilibrium BGK-NS solver will be developed for the nitrogen shock dissociation cases and then in Phase II, a gas-kinetic CFD counterpart of LAURA will be fully developed and well validated.

* information listed above is at the time of submission.

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