Interactive shock structure response to passage through turbulence

Conference · Wed Jun 06 04:00:00 EDT 1990

DOI:https://doi.org/10.2514/6.1990-1642· OSTI ID:6741716

Buckingham, A C

This discussion is on the apparent random changes to shock transitional velocity, density, and temperature induced when weak- to moderate-strength shocks interact with relatively intense, preshocked turbulence. The shock fronts appear to ripple or distort randomly and unsteadily. Shocks amplify and alter the spectral structure of turbulent fields with which they interact. Questions develop about the mechanisms significant in this interaction. Consideration is given to the significance of this process in enhancing turbulent mixing and transport, and to the evolution and decay of the intensified turbulence during and after such an interaction process. Analysis of this process should provide insight and a firmer basis for the development and test of more effective, consistent compressible turbulence models, and for the interpretation, design, and analysis of related experiments. At the present stage, particular emphasis is placed on determining estimates of the gross partition of directed shock energy into turbulent kinetic energy, and on fine-scale modal partition between acoustic, entropy, and vorticity fields during interactions. 13 refs., 9 figs., 2 tabs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6741716
• Report Number(s): UCRL-102304; CONF-9006153--3; AIAA--90-1642; ON: DE90013293
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
640410* -- Fluid Physics-- General Fluid Dynamics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACOUSTICS
BOUNDARY CONDITIONS
COMPRESSIBILITY
DENSITY
FLOW MODELS
FLUCTUATIONS
FUNCTIONS
INTERACTIONS
MATHEMATICAL MODELS
MATHEMATICS
MECHANICAL PROPERTIES
MONTE CARLO METHOD
PERTURBATION THEORY
PHYSICAL PROPERTIES
RANDOMNESS
RESPONSE FUNCTIONS
SHOCK WAVES
STATISTICS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
TURBULENCE
VARIATIONS
VELOCITY
WAVE PROPAGATION