Detailed numerical, graphical, and experimental study of oblique-shock-wave reflections
An extensive series of numerical calculations of oblique-shock-wave reflections in air and argon have been performed using a version of the second-order Eulerian Godunov scheme for inviscid compressible flow. This scheme is among the best of the upwind schemes developed in recent years. The results have been compared with the best available interferometric data from the UTIAS 10 cm x 18 cm shock tube, for fifteen different cases. The objective of this portion of the study was to assess the accuracy of the computer code in computing two-dimensional shocked flow of an inviscid perfect gas. A significant portion of our analysis is devoted to the question of the extent of influence of viscous and vibrational nonequilibrium effects on the experimental flow fields. Further parametrized series of calculations were performed in an effort to study the feasibility of numerically constructing inviscid transition lines in the (M/sub s/, theta/sub w/)-plane. Good agreement with analytic predictions was found for low values of M/sub s/ and, as might be expected, there are substantial discrepancies for M/sub s/ = 8.75. The possibility of using such numerical results in the formulation of accurate transition criteria is discussed. Overall, the computer code has been found to represent a significant predictive capability. The future extension of the code to permit the detailed modelling of nonequilibrium and viscous effects is, however, an important objective. 32 refs., 236 figs.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5073286
- Report Number(s):
- LBL-20033; ON: DE86002005
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AIR
SHOCK WAVES
WAVE PROPAGATION
ARGON
COMPUTER CODES
U CODES
IDEAL FLOW
COMPRESSIBLE FLOW
FLOW MODELS
REFLECTION
THEORETICAL DATA
TWO-DIMENSIONAL CALCULATIONS
DATA
ELEMENTS
FLUID FLOW
FLUIDS
GASES
INFORMATION
MATHEMATICAL MODELS
NONMETALS
NUMERICAL DATA
RARE GASES
640410* - Fluid Physics- General Fluid Dynamics