Author: T. H. HodgsonPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A Brief Review of U.S. and Canadian Work on Pressure Fluctuations in Turbulent Boundary Layers
Author: T. H. HodgsonBursts and Pressure Fluctuations in Turbulent Boundary Layers
Author: Peter BradshawPublisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 52
Book Description
Surface pressure fluctuations below turbulent boundary layers were studied, in part, because they can be regarded as 'footprints' of passing turbulent eddies. The pressure fluctuations are formally described by a Poisson equation, implying that the pressure fluctuation at a given point is mathematically represented by the integral of a 'source' term over the whole flow field, with a weighting inversely proportional to the distance of the source from the given point. In turbulent boundary layers, fluctuations were made in a low-speed constant pressure the high-frequency part of the wall pressure fluctuations is generated mainly within the inner layer - say, the first 20% of the boundary layer thickness - and the low-frequency part is generated mainly in the outer layer. Measurements of velocity and surface-pressure turbulent boundary layer well downstream of an extensive region of wall roughness. The turbulence near the wall was representative of a smooth-wall flow, while that in the outer layer was typical of the upper stream rough-wall flow. Comparison with previous measurements on an entirely smooth wall illustrates the relative contributions of the inner and outer layers to the surface pressure fluctuations. Further work has been done to compare the VITA (Variable ge) conditional-sampling algorithm withuctuations were more advanced algorithms. Keywords: Turbulent boundary layer, Noise measurement, Statistical analysis, Surface roughness, and VITA algorithm.
On Pressure Fluctuations Under Turbulent Boundary Layers
Author: J. A. B. WillsReport
Author: College of Aeronautics (Cranfield, England)Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 778
Book Description
The Influence of Pressure Fluctuations on Turbulent Boundary Layers with and Without Shock Interactions
Author: John Bernard CollBursts and Pressure Fluctuations in Turbulent Boundary Layers
Author: P. BradshawPublisher:
ISBN:
Category :
Languages : en
Pages : 65
Book Description
Development of measurement techniques and acquisition of velocity- and pressure- fluctuation data in low-speed turbulent boundary layers are described. The object was to study the generation of pressure fluctuations by the turbulent eddies and to use the surface pressure fluctuation as a diagnostic tools, thus bringing together new and existing knowledge of the behavior of the outer layer 'large eddies', the inner layer and viscous sublayer, and the surface pressure fluctuations themselves. Data analysis is still in progress.
"Inactive" Motion and Pressure Fluctuations in Turbulent Boundary Layers
Author: P. BradshawOn Surface Pressure Fluctuations in Turbulent Boundary Layers
Author: G. M. LilleyPublisher:
ISBN:
Category : Pressure
Languages : en
Pages : 26
Book Description
On Surface Pressure Fluctuations in Turbulent Boundary Layer
Author: College of Aeronautics (Cranfield, Bedfordshire)Publisher:
ISBN:
Category :
Languages : en
Pages : 47
Book Description
Some Features of Surface Pressure Fluctuations in Turbulent Boundary Layers with Zero and Favorable Pressure Gradients
Author: Brian E. McGrathPublisher:
ISBN:
Category : Boundary layer noise
Languages : en
Pages : 138
Book Description