Improved nonequilibrium viscous shock-layer scheme for hypersonic blunt-body flowfields
| Autor: | Clark H. Lewis, Bilal A. Bhutta |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Physics
Hypersonic speed Shock (fluid dynamics) Angle of attack business.industry Flow (psychology) Aerospace Engineering Non-equilibrium thermodynamics Mechanics Computational fluid dynamics Physics::Fluid Dynamics symbols.namesake Mach number Space and Planetary Science symbols business Conservation of mass |
| Zdroj: | Journal of Spacecraft and Rockets. 29:24-34 |
| ISSN: | 1533-6794 0022-4650 |
| DOI: | 10.2514/3.26310 |
| Popis: | The nonequilibrium viscous shock-layer (VSL) solution scheme is revisited to improve its solution accuracy in the stagnation region and also to minimize and control errors in the conservation of elemental mass. The stagnation-point solution is improved by using a second-order expansion for the normal velocity, and the elemental mass conservation is improved by directly imposing the element conservation equations as solution constraints. These modifications are such that the general structure and computational efficiency of the nonequilibrium VSL scheme is not affected. This revised nonequilibrium VSL scheme is used to study the Mach 20 flow over a 7-deg sphere-cone vehicle under 0- and 20-deg angle-of-attack conditions. Comparisons are made with the corresponding predictions of Navier-Stokes and parabolized Navier-Stokes solution schemes. The results of these tests show that the nonequilibrium blunt-body VSL scheme is indeed an accurate, fast, and extremely efficient means for generating the blunt-body flowfield over spherical nose tips at zero-to-large angles of attack. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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