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Showing 1 to 14 of 14 for “"Turbulent Boundary Layer flows"”.
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Roughness Effects on Super Structures in Turbulent Boundary Layer Flows
… wall roughness on large-scale structures within turbulent boundary layers, using wall-parallel stereoscopic Particle Image Velocimetry (PIV) at a Reynolds number of 1.3 × 106m−1. The data was collected at a distance of = 2.8 from the wall under adverse = 0.98, small = −0.04, and favorable = −0.60 …
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Experimental study of turbulent boundary layer flows over forward facing steps with different surface conditions.
… the effects of different surface types on turbulent flows over forward facing steps. A particle image velocimetry technique was employed to conduct field velocity measurements at the mid-plane of the test channel at selected locations downstream to 68 step heights. Three surface conditions …
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Study of Far Wake of a Surface-Mounted Obstacle Subjected to Turbulent Boundary Layer Flows
… body), approximately of height equal to the boundary layer thickness at one of the measurement locations of the flow. The experiments were performed by varying the Reynolds number of the flow and manipulating the pressure gradient distributions using a NACA 0012 airfoil placed within the wind …
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A study of velocity profile models and wall shear stress for two and three-dimensional turbulent boundary layer flows
… for two and three-dimensional incompressible flows was presented, with emphasis placed on those that had previously shown their ability to correlate experimental data taken under various conditions. This review included velocity profile models that seemingly could represent flows in which the …
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New mixing-length model for numerical solution of turbulent supersonic flows
… a new parameter S which is introduced in the new turbulent transport formula. The new parameter S acts like an effective turbulent Schmidt Number for mixtures of gases or a turbulent Prandtl Number for a homogeneous gas. The new turbulent model and Prandtl’s original model are both applied to six …
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A finite difference solution to the two-dimensional wall jet on a combustion turbine blade
… of a tangentially oriented wall jet with the boundary layer is presented. The boundary-layer equations for steady, two-dimensional, homogeneous, incompressible flow are solved using an implicit finite difference technique. Calculations are performed for laminar and turbulent boundary layer …
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Overview of the Skin Friction measurements on the NASA BeVERLI Hill using Oil Film Interferometry
… detailed database of non-equilibrium, separated turbulent boundary layer flows obtained through wind tunnel experiments for CFD validation. Skin friction measurements are obtained at specific critical locations on the hill and in its close proximity. The challenges involved in obtaining skin …
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New integral and differential computational procedures for incompressible wall-bounded turbulent flows
… the simulation of incompressible wall-bounded turbulent flows. First, an integral method based on the strip integral method has been developed for the solution of three-dimensional turbulent boundary-layer flows. The integral equations written in a general form using non-orthogonal streamline …
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An Experimental Study of Compressible Turbulent Reattaching Free Shear Layers
… to study compressible, two-dimensional, turbulent reattaching free shear layers formed by geometrical separation of a Mach 2.46 and a Mach 2.07 turbulent boundary layer flows over a backward-facing step. In the first set of experiments, the wind tunnel test section was specifically …
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Integral Boundary Layer Methods in Python
… presents a modern approach to two Integral Boundary Layer methods implemented in the Python programming language. This work is based on two 2D boundary layer methods: Thwaites' method for laminar boundary layer flows and Head's method for turbulent boundary layer flows. Several novel …
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A Study of Sound Generated by a Turbulent Wall Jet Flow Over Rough Surfaces
The far field acoustics generated by turbulent flow over rough surfaces has been experimentally investigated in an acoustically treated wall jet facility. The facility allows direct measurement of the far field sound from small patches of surface roughness, without contamination from edge or other …
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Excitation of Acoustic Surface Waves by Turbulence
… trapped acoustic surface waves when excited by a turbulent flow source. The metamaterial and flow were interfaced using a Kevlar covered single cavity whose Kevlar side faced the flow to ensure no significant disturbance to the flow and the other side was open to a quiescent (stationary) …
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A Numerical Study of Internal Flow Effects on Skin Friction Gages
… channel flow at a low Reynolds number, (b) a turbulent flat plate boundary layer flow at a high Reynolds number, and (c) strong favorable and adverse pressure gradient turbulent boundary layer flows created by converging and diverging channels at high Reynolds number. Reported results for all …
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Turbulence structure and flow resistance in oscillatory boundary layer flows
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2022-12-01