Author: Pasquale M. SforzaPublisher:
ISBN:
Category :
Languages : en
Pages : 83
Book Description
A Study of Three-dimensional, Incompressible, Turbulent Wall Jets
Author: Pasquale M. SforzaA Study of Three-dimensional, Incompressible, Turbulent Wall Jets
Author: Pasquale M. SforzaPublisher:
ISBN:
Category : Turbulent boundary layer
Languages : en
Pages : 0
Book Description
An Experimental Investigation of a Turbulent, Incompressible, Three-dimensional Wall Jet
Author: Hermann VietsPublisher:
ISBN:
Category : Turbulent boundary layer
Languages : en
Pages : 40
Book Description
This paper presents an experimental investigation of the bulk properties of a turbulent, three-dimensional, incompressible air wall jet issuing into a quiescent air ambient from a rectangular orifice parallel to and at the surface of a flat plate. Results of this study indicate the characteristic features of such a dissipative flow. The behavior of a three-dimensional flow field of this nature has associated with it three distinct regions in the axis velocity decay with an approach to the flow field of a radial wall jet far downstream of the jet exit and on the centerline of the flow. Spreading rates in the various cross planes display a dependence upon the aforementioned characteristic regions. (Author).
A Study of Three-dimensional Incompressible Free Turbulent Air Jets
Author: Obaidul IslamAn Experimental Investigation of Three-dimensional Free Mixing of Incompressible, Turbulent, Free Jets
Author: Nicholas TrentacostePublisher:
ISBN:
Category : Jets
Languages : en
Pages : 72
Book Description
An experimental investigation of the bulk properties of turbulent, three-dimensional, incompressible, air jets issuing into a quiescent air ambient is presented. The jet orifices utilized included rectangular, elliptical, axisymmetric and triangular geometries. Experimental results of pertinent mean flow properties such as axis velocity decay, half-width growth, etc., are reported. The flow fields of such jets are found to be characterized by three distinct regions in the axis velocity decay. The results obtained lead to the conclusion that low-speed jets which originate from non-axisymmetric orifices decay to axisymmetry far downstream of the jet exit. (Author).
An Experimental investigation of three dimensional incompressible wall jets on curved surfaces
Author: Zdravko Milan GabrijelPublisher:
ISBN:
Category :
Languages : en
Pages : 164
Book Description
An Experimental Investigation of a Three Dimensional Wall Jet
Author: George Dominic CatalanoPublisher:
ISBN:
Category : Jets
Languages : en
Pages : 390
Book Description
Three Dimensional Turbulent Wall Jets
Author: Pani, Bidya SagarPublisher: 1972.
ISBN:
Category :
Languages : en
Pages : 314
Book Description
Development of Three-dimensional Turbulent Wall Jets
Author: Huongguang SunPublisher:
ISBN:
Category : Turbulence
Languages : en
Pages : 414
Book Description
Detailed flow field measurements were performed to investigate the development of the three-dimensional wall jet, the effect of initial conditions on the development of wall jets and the evolution of the large-scale vortex structures that causes the large lateral growth rate in the flow. Single-point measurements in the wall jet exiting a contoured nozzle indicated that there were two regions in the intermediate field 10 & le; x/D & le; 40. The flow underwent a significant change in the region 10 & le; x/D & le; 20 as it adjusted to the wall. The changes of the profiles of the moments and the reorientation of the regions of the mean streamwise vorticity slowed down in the region beyond x/D = 20 and were not apparent by x/D = 40. The comparison of measurements of wall jets exiting the contoured nozzle and the fully developed long pipe indicated that changes in initial conditions do affect the jet half-widths and the decay of the maximum streamwise velocity through near and intermediate fields. The differences in growth rates of wall jets, profiles of moments and contours of the mean streamwise vorticity in the two jets were reduced in the region after x/D = 10 and were not apparent in the region beyond x/D = 20 & ndash;30. Measurements of two-point, two-time correlation of the streamwise fluctuating velocity indicated that the large-scale vortex structures that consist two pair of horseshoe vortices in the flow continued to develop throughout the intermediate field. In particular, the inner vortex structures were induced towards the wall by the outer structures and the legs of the outer structures inclined relative to the streamwise direction as the flow evolved downstream. Measurements also indicated that the flow below the outer region of the streamwise vorticity was laterally convected faster than the outer vortex structures.
Author: V. P. Maslov