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Thursday, May 14, 2020 | History

3 edition of Shock-turbulence interactions in a reacting flow found in the catalog.

Shock-turbulence interactions in a reacting flow

Shock-turbulence interactions in a reacting flow

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Published by National Aeronautics and Space Administration, Langley Research Center, National Technical Information Service, distributor in Hampton, Va, [Springfield, Va.? .
Written in English

    Subjects:
  • Turbulence.

  • Edition Notes

    StatementT.L. Jackson, M.Y. Hussaini, H.S. Ribner.
    SeriesNASA contractor report -- 189647., ICASE report -- no. 92-20., NASA contractor report -- NASA CR-189647., ICASE report -- no. 92-20.
    ContributionsHussaini, M. Yousuff., Ribner, H. S., Langley Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL14683626M

      Flow Configuration• Difference in flow configuration between non-reacting and reacting jet• Reacting case had thinner boundary layer thickness (shock tunnel) Non-reacting Reacting J ± Rejet ~, ~, Reδ ~, ~3, δ D D Ujet m/s m/s. Numerical Methods for Partial Differential Equations: Finite Difference and Finite Volume Methods focuses on two popular deterministic methods for solving partial differential equations (PDEs), namely finite difference and finite volume methods. The solution of PDEs can be very challenging, depending on the type of equation, the number of independent variables, the boundary, and initial.

    APA/FD Low Speed, Low Reynolds Number Aerodynamics • Friday, 17 June • hrs. () Regularization method for large eddy simulations of shock-turbulence interactions. Journal of Computational Physics , () A numerical algorithm for computation modelling of 3D nonlinear wave equations based on exponential modified cubic B-spline differential quadrature by:

    Flow visualization studies of the internal flow characteristics in asimulated mixed flow vectored thrust ASTOVL engine configuration. Numerical simulations of compressible and reacting temporal mixing layers and implications for modeling. Shock loading predictions from application of indicial theory to shock-turbulence interactions. The computational challenge of predicting shock/turbulence interactions stems from the fundamentally different physics at play. Shock waves are thin regions wherein flow properties change rapidly over a distance roughly equal to the molecular mean free path; hence, they are .


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Shock-turbulence interactions in a reacting flow Download PDF EPUB FB2

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Shock-turbulence interaction The scientific understanding of shock/turbulence interactions remains limited, despite decades of efforts. The most fundamental problem is arguably that of isotropic turbulence passing through a nominally normal shock wave, termed `canonical shock/turbulence.

Simulation of shock–turbulence interaction in non-reactive flow and in turbulent deflagration and detonation regimes using one-dimensional turbulence.

This is especially problematic for multi-physics regimes such as reacting flows because much of the complexity is thus relegated to Cited by: 7. Shock structure in shock-turbulence interactions. Flow retardation ahead of the shock is suggested as a mechanism for so-called broken shocks.

reacting fronts (supersonic combustion. Tian, F. Jaberi, D. Livescu, Z. Li, Numerical study of shock–turbulence interactions in variable density flows, in Proceedings of TSFP () Chicago, vol.

3 of International Symposium on Turbulence and Shear Flow Phenomena, pp. 8C–3 () Google Scholar. The idealized interactions of shock waves with homogeneous and isotropic turbulence, homogeneous sheared turbulence, turbulent jets, shear layers, turbulent wake flows, and two-dimensional boundary layers have been reviewed.

The interaction between a shock wave and turbulence is mutual. A shock wave exhibits substantial unsteadiness and deformation as a result of the interaction, whereas the Cited by: Large-Eddy Simulation of Shock-Turbulence Interaction.

The multi-phase reacting flow system is solved by a hybrid Eulerian-Lagrangian model, in which the supersonic mixing layer is mimicked by. The book presents a snapshot of the state-of-art in the field of turbulence modeling and covers the latest developments concerning direct numerical simulations, large eddy simulations, compressible turbulence, coherent structures, two-phase flow simulation, and other related topics.

The interaction of turbulence with shock waves is an important phenomenon in a variety of contexts including supernovae explosions, supersonic aerodynamics and propulsion, among others. To understand the complexities of such flows, substantial efforts have been devoted to the simplest case of isotropic turbulence interacting with a normal shock.

A widely used measure of the effect of a shock Cited by: A unified treatment of flow discontinuities and turbulent subgrid scales was previously pursued by Adams and Stolz, who employed a regularized approximate deconvolution technique to simulate shocks in one dimension.

The purpose of this paper is to introduce an artificial viscosity suitable for computing shock-turbulence by:   The flow parameters are: incoming Mach number, ; turbulent Mach number, ; Taylor Reynolds number, The effects of the interaction are.

SHOCK-TURBULENCE INTERACTIONS Figure 1 Schematic of flow configuration interactions with shock waves. (a) Homoge-neous and isotropic turbulence, (b) constant shear homogeneous turbulence, (c) turbulent jet, (d) free shear layer, (e) turbulent wake, File Size: KB.

The hybrid approach is found to be best suited for studying shock-turbulence interactions. Results from previous DNS and LES studies of the canonical shock-turbulence interaction problem, i.e. the interaction of isotropic turbulence with a (nominally) normal shock and comparison with available theory and experimental data are recalled.

The low Reynolds number k — ε turbulence model of Jones and Launder is used. Two double-cone models, corresponding to Type VI and Type V shock interactions, were tested at two operating conditions. The flow solutions obtained for the Type VI interactions are essentially laminar and reproduce the experimental by: 5.

The interaction of turbulence and shock waves is considered self-consistently so that the back-reaction of the turbulence and its associated reaction on the turbulence is addressed. This approach differs from previous studies which considered the interaction of linear modes with a shock.

The most basic model of hypersonic flow, described by the inviscid form of Burgers’ equation, is by: Shock-turbulence interactions. The interaction of shocks and turbulence is a fundamental phenomenon of fluid dynamics, and this interaction is critical in many areas such as aerodynamics, combustion, and astrophysics.

Because of the wide range of spatial and temporal scales that exist in these flows and the difficulty in capturing the shock in. 10th International Symposium on Turbulence and Shear Flow Phenomena (TSFP10), Chicago, USA, July, Numerical Study of Shock-Turbulence Interactions in Variable Density Flows Yifeng Tian, Farhad Jaberi Department of Mechanical Engineering Michigan State University East Lansing, MI [email protected], [email protected] Shock-turbulence interaction We study shock-turbulence interaction in its simplest form: homogeneous isotropic turbulence passing through a normal shock.

The shock amplifies the incoming disturbances and can also generate new kind of fluctuations; the shock itself gets distorted and coupled to the turbulence. The occurrence of shocklets in the latter for sufficiently high turbulence Mach numbers naturally leads to the study of the second category of flows, involving shock-turbulence interactions, for which configurations both with and without the presence of walls are considered.

The last part of the presentation is devoted to hypersonics. Regularization method for large eddy simulations of shock-turbulence interactions. Journal of Computational Physics, Vol.

Issue., p. At the strongest interaction of the present flow cases turbulent eddies are compressed in both directions. agree to abide by our usage policies. If this is the first time you use this feature Cited by:.

Nonlinear analysis of shock–vortex interaction: Mach stem formation - Volume - Paul ClavinCited by: 8.D. Livescu, J. Ryu the shock and the turbulence, the exact shock profile is no longer important for the interaction, so that LIA can be used to predict arbitrarily high Ms interaction problems, when the Navier–Stokes equations are no longer valid and fullyCited by: of shock/turbulent-boundary-layer interactions are of great importance from the standpoints of both physics and engineering, concurrent studies of shock/isotropic-turbulence interactions (SITI) can help to elucidate which physical processes are common to shock/turbulence interaction in Cited by: 3.