Author: William John CookPublisher:
ISBN:
Category : Engineering laboratories
Languages : en
Pages : 172
Book Description
A Study of Turbulent Boundary Layers in Oscillating Flows
Author: William John CookPublisher:
ISBN:
Category : Engineering laboratories
Languages : en
Pages : 172
Book Description
Turbulent Boundary Layers in Oscillating Flows
Author: William John CookPublisher:
ISBN:
Category : Fluid dynamics
Languages : en
Pages : 122
Book Description
A Facility for Studying Turbulent Boundary Layers in Oscillating Flows
Author: Publisher:
ISBN:
Category : Engineering laboratories
Languages : en
Pages : 166
Book Description
Calculation of Boundary Layers Near the Stagnation Point of an Oscillating Airfoil
Author: Tuncer CebeciPublisher:
ISBN:
Category :
Languages : en
Pages : 22
Book Description
The results of an investigation of boundary layers close to the stagnation point of an oscillating airfoil are reported. Two procedures for generating initial conditions - the characteristics-box scheme and a quasi-static approach - were investigated, and the quasi-static approach was shown to be appropriate provided the initial region was far from any flow separation. With initial conditions generated in this way, the unsteady boundary-layer equations were solved for the flow in the leading-edge region of a NACA 0012 airfoil oscillating from 0 degrees to 5 degrees. Results were obtained for both laminar and turbulent flow, and, in the latter case, the effect of transition was assessed by specifying its occurrence at different locations. The results demonstrate the validity of the numerical scheme and suggest that the procedures should be applied to calculation of the entire flow around oscillating airfoils. (Author).
Boundary-Layer Theory
Author: Herrmann SchlichtingPublisher: Springer Science & Business Media
ISBN: 9783540662709
Category : Technology & Engineering
Languages : en
Pages : 840
Book Description
A new edition of the almost legendary textbook by Schlichting completely revised by Klaus Gersten is now available. This book presents a comprehensive overview of boundary-layer theory and its application to all areas of fluid mechanics, with emphasis on the flow past bodies (e.g. aircraft aerodynamics). It contains the latest knowledge of the subject based on a thorough review of the literature over the past 15 years. Yet again, it will be an indispensable source of inexhaustible information for students of fluid mechanics and engineers alike.
A Compilation of Unsteady Turbulent Boundary Layer Experimental Data
Author: Lawrence W. CarrPublisher:
ISBN:
Category : Turbulence
Languages : en
Pages : 62
Book Description
A comprehensive literature search was conducted and those experiments related to unsteady turbulent boundary-layer behavior were cataloged. In addition, an international survey of industrial, university, and government research laboratories was made, in which new and ongoing experimental programs associated with unsteady turbulent boundary-layer research were identified. Pertinent references were reviewed and classified based on the technical emphasis of the various experiments that include instantaneous or ensemble-averaged profiles of boundary-layer variables are stressed. Detailed reviews that include descriptions of the experimental apparatus, flow conditions, summaries of acquired data, and significant conclusions are made. The measurements made in these experiments that exist in digital form have been stored on magnetic tape, and instructions are presented for accessing these data sets for further analysis. (Author).
Turbulent Boundary Layer Separation Characteristics with Blowing in an Oscillating Flow
Author: James Luther ForesmanPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages :
Book Description
Study of the Pressure Distribution on Oscillating Panels in Low Supersonic Flow with Turbulent Boundary Layer
Author: E. F. E. ZeydelPublisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 68
Book Description
Calculation of Boundary Layers of Oscillating Airfoils
Author: Drag Reduction for Turbulent Boundary Layer Flows Using an Oscillating Wall
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
This research program used experimental measurements and computational simulations to study the drag reduction, and the resulting effects on turbulence structure, for a turbulent wall flow subjected to lateral wall oscillations. Major objectives for this study were to establish wall oscillation conditions resulting in maximum drag reduction, and how the turbulence structure was altered so that this drag reduction was attained. Furthermore we were interested in the drag reduction performance over a range of Reynolds numbers, and the onset of the drag reduction at the start of the oscillating wall section, and the decay of drag reduction downstream of the oscillating wall. Our experiments showed the maximum drag reduction for an oscillating wall is 30%. Furthermore, the drag reduction reaches an asymptotic level with increasing wall oscillation velocity, with the maximum level occurring by approximately W sub wp=15. Drag reduction performance was tested for Reynolds numbers of Re theta =500, 950, 1400 and 2400, and the performance was found to be independent of Reynolds number for this range. Experimental and computational studies of the turbulence structure showed the oscillating wall has dramatic effect in practically eliminating the streak structures. Furthermore, the burst and sweep structures were suppressed.