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Author : Douglas J. Lewis
Release : 1996
Genre :
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Book Synopsis An Experimental Investigation of Heat Transfer in Three-dimensional and Separating Turbulent Boundary Layers by : Douglas J. Lewis
Download or read book An Experimental Investigation of Heat Transfer in Three-dimensional and Separating Turbulent Boundary Layers written by Douglas J. Lewis. This book was released on 1996. Available in PDF, EPUB and Kindle. Book excerpt:
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Release : 1996
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Book Synopsis An Experimental Investigation 0f Heat Transfer in Three-Dimensional and Separating Turbulent Boundary Layers by :
Download or read book An Experimental Investigation 0f Heat Transfer in Three-Dimensional and Separating Turbulent Boundary Layers written by . This book was released on 1996. Available in PDF, EPUB and Kindle. Book excerpt: The turbulence structure of convective beat transfer was studied experimentally in complex three-dimensional and separating turbulent boundary layers. Three test cases whose fluid dynamics have been well documented were examined. In case 1, time- and spatially-resolved surface heat transfer was measured in the nose region of a wing-body junction formed by a wing and a flat plate. Both the wing and the endwall were heated and held at a constant uniform temperature 20 C above ambient temperature. Heat flux rates were increased up to a factor of 3 over the heat flux rates in the approach boundary layer. The rms of the heat flux fluctuations were as high as 25% of the mean heat flux in the vortex-dominated nose region. Away from the wing, upstream of the time-averaged vortex center, augmentation in the heat flux is due to increased turbulent mixing caused by large-scale unsteadiness of the vortex. Adjacent to the wing the augmentation in heat flux is due to a change in the mean velocity field. In case 2, simultaneous surface heat flux and temperature profiles were measured at 8 locations in the spatially-developing pressure-driven three-dimensional turbulent boundary layer upstream of a wing-body junction. Mean heat transfer was decreased 10% by three-dimensionality. The turbulent Prandtl number in the near-wall region of logarithmic temperature variation was approximately 0.9 at all measurement locations in the three-dimensional boundary layer. Profiles of the skewness factor of temperature fluctuations and conditionally-averaged temperature signals during a sweep/ejection event suggest that the strength of ejections of hot fluid from the near-wall region are decreased by three-dimensionality.
Author : C. Herbert Law
Release : 1975
Genre : Aerodynamic heating
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Book Synopsis Three-dimensional Shock Wave-turbulent Boundary Layer Interactions at Mach 6 by : C. Herbert Law
Download or read book Three-dimensional Shock Wave-turbulent Boundary Layer Interactions at Mach 6 written by C. Herbert Law. This book was released on 1975. Available in PDF, EPUB and Kindle. Book excerpt: Experimental results of an investigation of the three-dimensional interaction between a skewed shock wave and a turbulent boundary layer are presented. Surface pressure and heat transfer distributions and oil flow photographs were obtained at a freestream Mach number of 5.85 and two Reynolds numbers of ten and twenty million per foot. The model configuration consisted of a shock generator mounted perpendicularly to a flat plate. The shock generator leading edge was sharp and nonswept and intersected the flat plate surface about 8.5 inches downstream of the flat plate leading edge. The shock generator surface was 7.55 inches long and 3 inches high and its angle to the freestream flow was adjusted from 4 to 20 degrees. The generated shock waves were of sufficient strength to produce turbulent boundary layer separation on the flat plate surface.
Author : Donald Edward Wroblewski
Release : 1990
Genre :
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Book Synopsis An Experimental Investigation of Turbulent Heat Transport in a Boundary Layer with an Embedded Streamwise Vortex by : Donald Edward Wroblewski
Download or read book An Experimental Investigation of Turbulent Heat Transport in a Boundary Layer with an Embedded Streamwise Vortex written by Donald Edward Wroblewski. This book was released on 1990. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stanford University. Thermosciences Division. Thermosciences Division
Release : 1985
Genre :
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Book Synopsis An Experimental Investigation of the Heat-transfer Effects of a Longitudinal Vortex Embedded in a Turbulent Boundary Layer by : Stanford University. Thermosciences Division. Thermosciences Division
Download or read book An Experimental Investigation of the Heat-transfer Effects of a Longitudinal Vortex Embedded in a Turbulent Boundary Layer written by Stanford University. Thermosciences Division. Thermosciences Division. This book was released on 1985. Available in PDF, EPUB and Kindle. Book excerpt:
