Open Access
Characteristics of turbulence in a boundary layer with zero pressure gradient
Reads0
Chats0
TLDR
In this article, the results of an experimental investigation of a turbulent boundary layer with zero pressure gradient are presented and the importance of the region near the wall and the inadequacy of the concept of local isotropy are demonstrated.Abstract:
The results of an experimental investigation of a turbulent boundary layer with zero pressure gradient are presented. Measurements with the hot-wire anemometer were made of turbulent energy and turbulent shear stress, probability density and flattening factor of u-fluctuation (fluctuation in x-direction), spectra of turbulent energy and shear stress, and turbulent dissipation. The importance of the region near the wall and the inadequacy of the concept of local isotropy are demonstrated. Attention is given to the energy balance and the intermittent character of the outer region of the boundary layer. Also several interesting features of the spectral distribution of the turbulent motions are discussed.read more
Citations
More filters
DissertationDOI
Microphone-based pressure diagnostics for boundary layer transition
TL;DR: In this article, two small electret condenser microphones, the Knowles FG-23629 and the FG-23742, were used to measure the pressure fluctuations and considered for possible integration with an autonomous boundary layer measurement system.
Journal ArticleDOI
Navier-Stokes analysis of turbine flowfield and external heat transfer
J. Luo,B. Lakshminarayana +1 more
TL;DR: An explicit two-dimensional Navier-Stokes code has been modified and used to analyze the aerodynamics and heat transfer of a transonic turbine cascade as mentioned in this paper, which is based on a four-stage Runge-Kutta scheme.
Journal ArticleDOI
Velocity profiles and pressure fluctuations in the boundary layer on the roof of a railway coach
TL;DR: In this paper, a rake of Pitot tubes was used to measure velocity profiles in the tubulent boundary layer on the roof of an Intercity passenger coach travelling at speeds between 120 and 250 km/h.
Proceedings ArticleDOI
A Second-Order Closure for the New Rough Wall Layer Modeling Using the Brinkman Equation in Turbulent Boundary Layers
Meng Huang Lu,William W. Liou +1 more
TL;DR: A second-order turbulence closure for the new rough wall layer modeling using the Brinkman equation is developed to improve the predictive capability of a previously developed k-e turbulence closure in rough wall turbulent boundary layers as discussed by the authors.
References
More filters
Journal Article
The Local Structure of Turbulence in Incompressible Viscous Fluid for Very Large Reynolds' Numbers
TL;DR: In this article, the authors consider the problem of finding the components of the velocity at every point of a point with rectangular cartesian coordinates x 1, x 2, x 3, x 4, x 5, x 6, x 7, x 8.
The Structure of Turbulence in Fully Developed Pipe Flow
TL;DR: In this paper, a hot-wire anemometer was used to measure the turbulent flow in a 10-inch pipe at speeds of approximately 10 and 100 feet per second, and the results include relevant mean and statistical quantities, such as Reynolds stresses, triple correlations, turbulent dissipation, and energy spectra.
DissertationDOI
Investigation of turbulent flow in a two-dimensional channel
TL;DR: A detailed exploration of the field of mean and fluctuating quantities in a two-dimensional turbulent channel flow is presented in this article, where mean speed and axial-fluctuation measurements were made well within the laminar sublayer.
Some Features of Artificially Thickened Fully Developed Turbulent Boundary Layers with Zero Pressure Gradient
P S Klebanoff,Z W Diehl +1 more
TL;DR: In this article, the feasibility of artificially thickening a turbulent boundary layer on a flat plate was investigated and it was shown that it is possible to do substantial thickening and obtain a fully developed turbulent boundary layers, which is free from any distortions introduced by the thickening process.