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HYPERSONIC ANALYSIS FOR VEHICLES IN THE CONTINUUM-TRANSITIONREGIME

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
17157
Program Year/Program:
1991 / SBIR
Agency Tracking Number:
17157
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Amtec Engineering Inc
P.o. Box 3633 Bellevue, WA 00000
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1991
Title: HYPERSONIC ANALYSIS FOR VEHICLES IN THE CONTINUUM-TRANSITIONREGIME
Agency: NASA
Contract: N/A
Award Amount: $49,925.00
 

Abstract:

SEVERAL AEROSPACE VECHICLES ARE CURRENTLY BEING CONSIDERED THAT HAVE A SIGNIFICANT PORTION OF THEIR FLIGHT PATH IN THE UPPER REACHES OF THE ATMOSPHERE. THE FLOW ABOUT THESE VEHICLES IS IN THE CONTINUUM-TRANSITION REGIME WHERE THE STANDARD EQUATIONS OF CONTINUUM FLOW, THE NAVIER-STOKES EQUATIONS, BEGIN TO FALL. THIS PROJECT WILL MODIFY THE HANA CODE, AN EXISTING NAVIER-STOKES CODE FOR THE ANALYSIS OF HYPERSONIC VEHICLES TO SOLVE THE BURNETT EQUATIONS WITH COUPLED, ROTATIONAL NONEQUILIBRIUM. THE BURNETT EQUATIONS ARE MORE ACCURATE THAN THE NAVIER-STOKES EQUATIONS FOR LOW-DENSITY FLOWS WITH FINITE THICKNESS SHOCKS. SOLUTIONS TO THE BURNETT EQUATIONS HAVE ONLY RECENTLY BEEN OBTAINED FOR THE HYPERSONIC FLOWS. THE PHASE I INVESTIGATION WILL DETERMINE THE VIABILITY OF SOLVING THE BURNETT EQUATIONS WITH COUPLED, ROTATIONAL, NONEQUILIBRIUM AND SURFACE-SLIP BOUNDARY CONDITIONS WITHIN THE HANA CODE. IN PARTICULAR, THE RAMIFICATIONS OF USING UPWIND DIFFERENCING OF THE INVISCID FLUXES AND DIAGONALIZED VISCOUS JACOBIANS IN THE LU-SGS IMPLICIT METHOD WILL BE STUDIED. THE PROPER IMPLEMENTATION OF SURFACE-SLIP BOUNDARY CONDITIONS WILL ALSOBE CONSIDERED. SEVERAL AEROSPACE VECHICLES ARE CURRENTLY BEING CONSIDERED THAT HAVE A SIGNIFICANT PORTION OF THEIR FLIGHT PATH IN THE UPPER REACHES OF THE ATMOSPHERE. THE FLOW ABOUT THESE VEHICLES IS IN THE CONTINUUM-TRANSITION REGIME WHERE THE STANDARD EQUATIONS OF CONTINUUM FLOW, THE NAVIER-STOKES EQUATIONS, BEGIN TO FALL. THIS PROJECT WILL MODIFY THE HANA CODE, AN EXISTING NAVIER-STOKES CODE FOR THE ANALYSIS OF HYPERSONIC VEHICLES TO SOLVE THE BURNETT EQUATIONS WITH COUPLED, ROTATIONAL NONEQUILIBRIUM. THE BURNETT EQUATIONS ARE MORE ACCURATE THAN THE NAVIER-STOKES EQUATIONS FOR LOW-DENSITY FLOWS WITH FINITE THICKNESS SHOCKS. SOLUTIONS TO THE BURNETT EQUATIONS HAVE ONLY RECENTLY BEEN OBTAINED FOR THE HYPERSONIC FLOWS. THE PHASE I INVESTIGATION WILL DETERMINE THE VIABILITY OF SOLVING THE BURNETT EQUATIONS WITH COUPLED, ROTATIONAL, NONEQUILIBRIUM AND SURFACE-SLIP BOUNDARY CONDITIONS WITHIN THE HANA CODE. IN PARTICULAR, THE RAMIFICATIONS OF USING UPWIND DIFFERENCING OF THE INVISCID FLUXES AND DIAGONALIZED VISCOUS JACOBIANS IN THE LU-SGS IMPLICIT METHOD WILL BE STUDIED. THE PROPER IMPLEMENTATION OF SURFACE-SLIP BOUNDARY CONDITIONS WILL ALSOBE CONSIDERED.

Principal Investigator:

Scott T Imlay
2068273304

Business Contact:

Small Business Information at Submission:

Amtec Engineering Inc
3055 112th Ave Ne, #208 Bellevue, WA 98004

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No