Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 11
Book Description
Three-Dimensional Unsteady Laminar Shock-Wave/Boundary Layer Interaction
Author: Shock Wave-Boundary-Layer Interactions
Author: Holger BabinskyPublisher: Cambridge University Press
ISBN: 1139498649
Category : Technology & Engineering
Languages : en
Pages : 481
Book Description
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.
Boundary Layer Research
Author: International Union of Theoretical and Applied MechanicsPublisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 432
Book Description
Three Dimensional/Boundary Layer Interaction: Laminar and Turbulent Behaviour
Author: J. J. GinouxPublisher:
ISBN:
Category :
Languages : en
Pages : 65
Book Description
An experimental study of a 3D skewed shock wave laminar boundary layer interaction has been carried out. The test configuration was a flat/finned plat arrangement with sharp leading edge fins having 4, 6 and 8 deg incidence relative to the free stream. The flat plate laminar boundary layer had thickness between 1.1 and 2.2 mm depending on test conditions. The unit Reynolds numbers used were 1.2 million and 2.4 million. Experimental surface data represented as surface flow visualizations and pressure distributions are presented for all test conditions. All tests were carried out at a nominal free stream Mach number of 2.25 and under approximately adiabatic wall conditions. The experimental results indicate that extended separation occurs even for the smallest wedge incidence, i.e., for a pressure ratio of 1.27 and that the extent of upstream influence is much larger in this 3D interaction than in comparable 2D interactions. Preliminary theoretical investigations show that an integral method is not suited for the study of the present interaction. The new implicit corrected viscosity method for solving the compressible Navier-Stokes equations can yield convergence speeds of order unity under suitable chosen conditions. (Author).
Laminar and Turbulent Separation Including Three-dimensional Effects
Author: Von Karman Institute for Fluid DynamicsPublisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 254
Book Description
Computation of Three-dimensional Shock Wave and Boundary-layer Interactions
Author: Shock Wave-turbulent Boundary Layer Interaction in a Three-dimensional Flow
Author: D. BarberisA Critical Evaluation of Analytic Methods for Predicting Laminar Boundary-layer, Shock-wave Interaction
Author: John D. MurphyPublisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 36
Book Description
Velocity Measurements in a 3D (Three Dimensional) Shock Wave Laminar Boundary Layer Interaction
Author: G. DegrezPublisher:
ISBN:
Category :
Languages : en
Pages : 46
Book Description
An experimental investigation of the three dimensional laminar boundary layer separation associated with an incident swept shock wave was conducted in the von Karman Institute (VKI) S-1 supersonic wind tunnel operating at Mach 2.15. Mean velocity profiles were measured both in the attached separated and reattachment flow regions using a laser doppler velocimeter. A comparison of the measurements with a full 3D Navier-Stokes solver, developed at the VKI, exhibited good agreement in all three regions, thus validating the code which was based on the Beam-Warming algorithm. The report also reviews the earlier parts of the grant dealing with the necessary developments in LDV to achieve high quality data, and the of the 2D shock boundary layer interaction. Keywords: Two dimensional flow; Three dimensional flow; Laminar boundary layer; Flow separation.
An Exploratory Study of a Three-Dimensional Shock Wave Boundary Layer Interaction at Mach 3
Author: B. OskamPublisher:
ISBN:
Category :
Languages : en
Pages : 15
Book Description
An exploratory experimental investigation has been carried out on the three dimensional flow fields caused by the interaction of oblique shock waves and a planar turbulent boundary layer. The study was performed at a free stream Mach number of 2.95, a Reynolds number per inch of 1.6 million and near adiabatic wall conditions. The interaction was studied on two experimental configurations having different initial boundary layer thicknesses (delta = approx. 0.13 and 0.55 inches). Both surface measurements as well as complete flow field surveys were performed. The main contributions of the present investigation are two experimentally derived flow field models for shock generator angles of 4 deg and 10 deg. Based upon both static pressure and surface flow patterns, as well as heat transfer data, the interaction region can be characterized as quasi-two-dimensional along the shock direction in the region studied. A critical examination of the occurrence of 'ordinary' flow separation and its character, as applied to the present problem, was carried out. It was concluded that McCabe's criterion, as used by the previous investigators, is not a sufficient condition to determine the onset of flow separation.