Author: L. F. G. SimmonsPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Experimental Investigation of Boundary Layer Flow
Author: L. F. G. SimmonsExperimental Investigation of Boundary Layer Flow
Author: Leonard Frederick George SimmonsPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Experimental Investigation of Turbulent Boundary Layer with Uniform Blowing at Moderate and High Reynolds Numbers
Author: Gazi HasanuzzamanPublisher: Cuvillier Verlag
ISBN: 3736965583
Category : Technology & Engineering
Languages : en
Pages : 180
Book Description
Experimental investigation in turbulent boundary layer flows represents one of the canonical geometries of wall bounded shear flows. Utmost relevance of such experiments, however, is applied in the engineering applications in aerospace and marine industries. In particular, continuous effort is being imparted to explore the underlying physics of the flow in order to develop models for numerical tools and to achieve flow control. Flow control experiments have been widely investigated since 1930’s. Several flow control technique has been explored and have shown potential benefit. But the choice of control technique depends largely on the boundary condition and the type of application. Hence, friction drag of subsonic transport aircraft is intended to be reduced within the scope of this Ph. D. topic. Therefore, application of active control method such as microblowing effect in the incompressible, zero pressure gradient turbulent boundary layer was investigated. A series of experiments have been performed in two different wind tunnel facilities. Wind tunnel from Department of Aerodynamics and Fluid Mechanics (LAS) was used for the measurements for moderate Reynolds number range in co-operation with the wind tunnel from Laboratoire de M´ecanique de Feiret Lille for large Reynolds number range. Measurements are conducted with the help of state-of-the-art techniques such as Laser Doppler Anemometry, Particle Image Velocimetry and electronic pressure sensors.
An Experimental Investigation of Boundary Layer Flow
Author: L. F. G. SimmonsPublisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 18
Book Description
An Experimental Investigation of the Flow Structure of the Turbulent Boundary Layer
Author: Peter W. RunstadlerPublisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 326
Book Description
A combination of visual and quantitative measurements is presented, providing a physical picture of the turbulent boundary layer flow structure on a flat plate. The flow structure is shown to consist of three zones, each zone has a one to one correspondence to the well known regions of the u+, y+ mean velocity profile. A wall layer region is shown to exist below y+ = 10. An apparently fully turbulent region exists corresponding to the logarithmic ''law of the wall'' and the ''buffer'' region. An intermittent zone appears to agree closely with the ''wake'' deviation region. An entirely new result of the investigation is the delineation of the structure of the wall layer region. This region is shown to contain a relatively regular structure of low and high velocity fluid streaks alternating in the span direction, together with the ejection of low momentum fluid into the outer flow. Correlations are given for the rate of ejection and the streak spacing. A qualitative description of other features of the wall layer region and the character of the remainder of the boundary layer flow structure is presented. (Author).
An Experimental Investigation of the Compressible Turbulent Boundary Layer with a Favorable Pressure Gradient
Author: David L. BrottPublisher:
ISBN:
Category : Compressibility
Languages : en
Pages : 104
Book Description
The paper describes the results of a detailed experimental investigation of a two-dimensional turbulent boundary layer in a favorable pressure gradient where the free-stream Mach number varied from 3.8 to 4.6 and the ratio of wall to adiabatic-wall temperature has a nominal value of 0.82. Detailed profile measurements were made with pressure and temperature probes; skin friction was measured directly with a shear balance. The velocity- and temperature-profile results were compared with zero pressure gradient and incompressible results. The skin-friction data were correlated with momentum-thickness Reynolds number and pressure-gradient parameter. (Author).
Experimental Investigation of Boundary Layer Flow Transition Over a Flat Plate
Author: William John GanderExperimental Investigation of Boundary Layer Flow Along a Flat Plate with Uniform Suction
Author: J. M. KayAn Experimental Investigation of Boundary Layer Flow, Wita Special Reference to Methods of Detecting the Transitional Region
Author: L. F. G. SimmonsExperimental Investigation of Boundary Layer Behavior in a Simulated Low Pressure Turbine
Author: Ki-Hyeon SohnPublisher:
ISBN:
Category : Boundary layers
Languages : en
Pages : 16
Book Description