A Numerical Study of Normal-shock/turbulent Boundary Layer Interactions
Title | A Numerical Study of Normal-shock/turbulent Boundary Layer Interactions PDF eBook |
Author | Lowell C. Keel (MAJ, USAF.) |
Publisher | |
Pages | 126 |
Release | 1979 |
Genre | Shock waves |
ISBN |
A Numerical Study of Normal-Shock/Turbulent Boundary Layer Interactions
Title | A Numerical Study of Normal-Shock/Turbulent Boundary Layer Interactions PDF eBook |
Author | Lowell C. Keel |
Publisher | |
Pages | 77 |
Release | 1979 |
Genre | |
ISBN |
The hybrid finite difference code developed by MacCormack was applied to the investigation of transonic normal-shock turbulent boundary layer interactions. The computations were performed for the half plane of a symetric two dimensional duct by establishing a symmetry boundary condition at the upper boundary. Both first and second order center line boudnary conditions were imposed with no measurable difference observed. A two-point linear extrapolation of the primative variable was unsuccessfully attempted at the subsonic outflow boundary, but a simple zero gradient condition gave satisfactory results at four different outflow boundary positions relative to the shock wave. Numerical results (M = 1.51, 1.40 and 1.3 Re = 3,000,000 per ft) were compared with the experimental data reported by Abbiss and East. Even though the data exhibit three-dimensional effects, the two-dimensional computations show agreement within approximately 10%. The differences observed in the numerical-experimental comparisons were all consistent with expected three-dimensional trends. Although not conclusive, the potential of adding simple three-dimensional corrections to the two-dimensional code shows promise for improving the experimental-numerical agreement. (Author).
Numerical Simulation of a Confined Transonic Normal Shock Wave/turbulent Boundary Layer Interaction
Title | Numerical Simulation of a Confined Transonic Normal Shock Wave/turbulent Boundary Layer Interaction PDF eBook |
Author | E. Blosch |
Publisher | |
Pages | |
Release | 1992 |
Genre | |
ISBN |
Shock Wave-Boundary-Layer Interactions
Title | Shock Wave-Boundary-Layer Interactions PDF eBook |
Author | Holger Babinsky |
Publisher | Cambridge University Press |
Pages | 481 |
Release | 2011-09-12 |
Genre | Technology & Engineering |
ISBN | 1139498649 |
Shock wave-boundary-layer interaction (SBLI) is a fundamental phenomenon in gas dynamics that is observed in many practical situations, ranging from transonic aircraft wings to hypersonic vehicles and engines. SBLIs have the potential to pose serious problems in a flowfield; hence they often prove to be a critical - or even design limiting - issue for many aerospace applications. This is the first book devoted solely to a comprehensive, state-of-the-art explanation of this phenomenon. It includes a description of the basic fluid mechanics of SBLIs plus contributions from leading international experts who share their insight into their physics and the impact they have in practical flow situations. This book is for practitioners and graduate students in aerodynamics who wish to familiarize themselves with all aspects of SBLI flows. It is a valuable resource for specialists because it compiles experimental, computational and theoretical knowledge in one place.
Numerical Simulation of Shock/Turbulent Boundary Layer Interaction
Title | Numerical Simulation of Shock/Turbulent Boundary Layer Interaction PDF eBook |
Author | National Aeronautics and Space Adm Nasa |
Publisher | |
Pages | 48 |
Release | 2018-11 |
Genre | |
ISBN | 9781729357682 |
Most flows of aerodynamic interest are compressible and turbulent. However, our present knowledge on the structures and mechanisms of turbulence is mostly based on incompressible flows. In the present work, compressibility effects in turbulent, high-speed, boundary layer flows are systematically investigated using the Direct Numerical Simulation (DNS) approach. Three-dimensional, time-dependent, fully nonlinear, compressible Navier-Stokes equations were numerically integrated by high-order finite-difference methods; no modeling for turbulence is used during the solution because the available resolution is sufficient to capture the relevant scales. The boundary layer problem deals with fully-turbulent compressible flows over flat geometries. Apart from its practical relevance to technological flows, turbulent compressible boundary layer flow is the simplest experimentally realizable turbulent compressible flow. Still, measuring difficulties prohibit a detailed experimental description of the flow, especially in the near-wall region. DNS studies provide a viable means to probe the physics of compressible turbulence in this region. The focus of this work is to explore the paths of energy transfer through which compressible turbulence is sustained. The structural similarities and differences between the incompressible and compressible turbulence are also investigated. The energy flow patterns or energy cascades are found to be directly related to the evolution of vortical structures which are generated in the near-wall region. Near-wall structures, and mechanisms which are not readily accessible through physical experiments are analyzed and their critical role on the evolution and the behavior of the flow is documented extensively. Biringen, Sedat and Hatay, Ferhat F. Unspecified Center NAG1-1472...
Numerical Simulation of 3-D Shock Wave Turbulent Boundary Layer Interaction Using a Two Equation Model of Turbulence
Title | Numerical Simulation of 3-D Shock Wave Turbulent Boundary Layer Interaction Using a Two Equation Model of Turbulence PDF eBook |
Author | Marianna Gnedin |
Publisher | |
Pages | 130 |
Release | 1996 |
Genre | |
ISBN |
Physics and Numerical Simulation of Shock Wave/turbulent Boundary-layer Interactions
Title | Physics and Numerical Simulation of Shock Wave/turbulent Boundary-layer Interactions PDF eBook |
Author | G. W. Heard |
Publisher | |
Pages | |
Release | 1998 |
Genre | |
ISBN |