Observations Of The Effects Of High Free Stream Turbulence Levels On The Heat Transfer To A Concavely Curved Turbulent Boundary Layer
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Observations Of The Effects Of High Free Stream Turbulence Levels On The Heat Transfer To A Concavely Curved Turbulent Boundary Layer
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Author : Stanford University. Thermosciences Division. Thermosciences Division
language : en
Publisher:
Release Date : 1989
Observations Of The Effects Of High Free Stream Turbulence Levels On The Heat Transfer To A Concavely Curved Turbulent Boundary Layer written by Stanford University. Thermosciences Division. Thermosciences Division and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.
Free Stream Turbulence And Concave Curvature Effects On Heated Transitional Boundary Layers
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Author : Jungho Kim
language : en
Publisher:
Release Date : 1990
Free Stream Turbulence And Concave Curvature Effects On Heated Transitional Boundary Layers written by Jungho Kim and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with categories.
Free Stream Turbulence And Concave Curvature Effects On Heated Transitional Boundary Layers
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-07-24
Free Stream Turbulence And Concave Curvature Effects On Heated Transitional Boundary Layers written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-24 with categories.
An experimental investigation of the transition process on flat-plate and concave curved-wall boundary layers for various free-stream turbulence levels was performed. Results show that for transition of a flat-plate, the two forms of boundary layer behavior, identified as laminar-like and turbulent-like, cannot be thought of as separate Blasius and fully-turbulent profiles, respectively. Thus, simple transition models in which the desired quantity is assumed to be an average, weighted on intermittency, of the theoretical laminar and fully turbulent values is not expected to be successful. Deviation of the flow identified as laminar-like from theoretical laminar behavior is shown to be due to recovery after the passage of a turbulent spot, while deviation of the flow identified as turbulent-like from the full-turbulent values is thought to be due to incomplete establishment of the fully-turbulent power spectral distribution. Turbulent Prandtl numbers for the transitional flow, computed from measured shear stress, turbulent heat flux and mean velocity and temperature profiles, were less than unity. For the curved-wall case with low free-stream turbulence intensity, the existence of Gortler vortices on the concave wall within both laminar and turbulent flows was established using liquid crystal visualization and spanwise velocity and temperature traverses. Transition was found to occur via a vortex breakdown mode. The vortex wavelength was quite irregular in both the laminar and turbulent flows, but the vortices were stable in time and space. The upwash was found to be more unstable, with higher levels of u' and u'v', and lower skin friction coefficients and shape factors. Turbulent Prandtl numbers, measured using a triple-wire probe, were found to be near unity for all post-transitional profiles, indicating no gross violation of Reynolds analogy. No evidence of streamwise vortices was seen in the high turbulence intensity case. Kim, J. and Simon, T. W. Unspecified Cen...
Response Au Seditieux Escrit Intitul L Esprit De Paix Fait En Faveur Du Mazarin Et Sem Par Toute La Ville
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Author :
language : en
Publisher:
Release Date : 1652
Response Au Seditieux Escrit Intitul L Esprit De Paix Fait En Faveur Du Mazarin Et Sem Par Toute La Ville written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1652 with categories.
The Effects Of Grid Generated Turbulence On Flat And Concave Turbulent Boundary Layers
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Author : Paul Leslie Johnson
language : en
Publisher:
Release Date : 1989
The Effects Of Grid Generated Turbulence On Flat And Concave Turbulent Boundary Layers written by Paul Leslie Johnson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.
Effect Of Free Stream Turbulence On Heat Transfer To A Strongly Accelerated Turbulent Boundary Layer
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Author : Stanford University. Thermosciences Division. Thermosciences Division
language : en
Publisher:
Release Date : 1970
Effect Of Free Stream Turbulence On Heat Transfer To A Strongly Accelerated Turbulent Boundary Layer written by Stanford University. Thermosciences Division. Thermosciences Division and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with categories.
Heat Transfer With Very High Free Stream Turbulence
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Author : Paul Kevin Maciejewski
language : en
Publisher:
Release Date : 1989
Heat Transfer With Very High Free Stream Turbulence written by Paul Kevin Maciejewski and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.
The Effects Of Streamwise Concave Curvature On Turbulent Boundary Layer Structure
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Author : Albert H. Jeans
language : en
Publisher:
Release Date : 1982
The Effects Of Streamwise Concave Curvature On Turbulent Boundary Layer Structure written by Albert H. Jeans and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Turbulent boundary layer categories.
Concave curvature has a relatively large, unpredictable effect on turbulent boundary layers. Some, but not all previous studies suggest that a large-scale, stationary array of counter-rotating vortices exists within the turbulent boundary layer on a concave wall. The objective of the present study was to obtain a qualitative model of the flow field in order to increase our understanding of the underlying physics. A large free-surface water channel was constructed in order to perform a visual study of the flow. Streamwise components of mean velocity and turbulence intensity were measured using a hot film anemometer. The upstream boundary was spanwise uniform with a momentum thickness to radius of curvature of 0.05. Compared to flat wall flow, large-scale, randomly distributed sweeps and ejections were seen in the boundary layer on the concave wall. The sweeps appear to suppress the normal mechanism for turbulence production near the wall by inhibiting the bursting process. The ejections appear to enhance turbulence production in the outer layers as the low speed fluid convected from regions near the wall interacts with the higher speed fluid farther out. The large-scale structures did not occur at fixed spanwise locations, and could not be called roll cells or vortices. (Author).
Heat Transfer And Fluid Mechanics Measurements In A Turbulent Boundary Layer
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Author : Michael Dimitris Kestoras
language : en
Publisher:
Release Date : 1993
Heat Transfer And Fluid Mechanics Measurements In A Turbulent Boundary Layer written by Michael Dimitris Kestoras and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.
Preliminary Experimental Investigation Of Effect Of Free Stream Turbulence On Turbulent Boundary Layer Growth
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Author : S. J. Kline
language : en
Publisher:
Release Date : 1960
Preliminary Experimental Investigation Of Effect Of Free Stream Turbulence On Turbulent Boundary Layer Growth written by S. J. Kline and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with Fluid dynamics categories.