Flowfield Dynamics in Blunt Fin-Induced Shock Wave/Turbulent Boundary Layer Interactions
Title | Flowfield Dynamics in Blunt Fin-Induced Shock Wave/Turbulent Boundary Layer Interactions PDF eBook |
Author | National Aeronautics and Space Administration (NASA) |
Publisher | Createspace Independent Publishing Platform |
Pages | 82 |
Release | 2018-07-06 |
Genre | |
ISBN | 9781722402402 |
Fluctuating wall pressure measurements have been made on centerline upstream of a blunt fin in a Mach 5 turbulent boundary layer. By examining the ensemble averaged wall pressure distributions for different separation shock foot positions, it has been shown that local fluctuating wall pressure measurements are due to a distinct pressure distribution, Rho(sub i), which undergoes a stretching and flattening effect as its upstream boundary translates aperiodically between the upstream influence and separation lines. The locations of the maxima and minima in the wall pressure standard deviation can be accurately predicted using this distribution, providing quantitative confirmation of the model. This model also explains the observed cross-correlations and ensemble average measurements within the interaction. Using the Rho(sub i) model, wall pressure signals from under the separated flow region were used to reproduce the position-time history of the separation shock foot. Further, the negative time delay peak in the cross-correlation between the predicted and actual shock foot histories suggests that the separated region fluctuations precede shock foot motion. The unsteady behavior of the primary horseshoe vortex and its relation to the unsteady separation shock are described. Dolling, David S. and Brusniak, Leon Unspecified Center...
Flowfield Dynamics in Blunt Fin-induced Shockwave Turbulent Boundary-layer Interaction
Title | Flowfield Dynamics in Blunt Fin-induced Shockwave Turbulent Boundary-layer Interaction PDF eBook |
Author | L. Brusniak |
Publisher | |
Pages | |
Release | 1993 |
Genre | |
ISBN |
Flowfield Scaling in Sharp Fin-induced Shock Wave Turbulent Boundary Layer Interaction
Title | Flowfield Scaling in Sharp Fin-induced Shock Wave Turbulent Boundary Layer Interaction PDF eBook |
Author | W. B. McClure |
Publisher | |
Pages | |
Release | 1983 |
Genre | |
ISBN |
Experimental Study of Three-Dimensional Shock Wave Turbulent Boundary Layer Interaction - Scaling of Sharp and Blunt Fin-Induced Flowfields
Title | Experimental Study of Three-Dimensional Shock Wave Turbulent Boundary Layer Interaction - Scaling of Sharp and Blunt Fin-Induced Flowfields PDF eBook |
Author | David S. Dolling |
Publisher | |
Pages | 61 |
Release | 1980 |
Genre | |
ISBN |
An experimental study of three-dimensional (3-D) shock wave turbulent boundary layer interaction has been carried out. Interactions generated by fin models having sharp and hemi-cylindrically blunted leading edges have been studied. Tests have been made using incoming turbulent boundary layer varying in thickness in the ratio of about 4:1. Extensive surface property measurements have been made on the test surface on which the incoming boundary layer developed and on the fin itself. All of these tests were carried out at a nominal freestream Mach number of 3, a freestream unit Reynolds number of about 63 million per meter, and under approximately adiabatic wall conditions. The emphasis in the study reported on in this paper was on two main areas. First, to determine the key geometric and/or flow parameters controlling the overall scaling and characteristics of both blunt and sharp fin-induced interactions. Second, to identify the conditions under which both blunt and sharp fins induced interactions have the same local scale and characteristics. (Author).
Shock Wave-Boundary-Layer Interactions
Title | Shock Wave-Boundary-Layer Interactions PDF eBook |
Author | Holger Babinsky |
Publisher | Cambridge University Press |
Pages | 481 |
Release | 2011-09-12 |
Genre | Technology & Engineering |
ISBN | 1139498649 |
Shock wave-boundary-layer interaction (SBLI) is a fundamental phenomenon in gas dynamics that is observed in many practical situations, ranging from transonic aircraft wings to hypersonic vehicles and engines. SBLIs have the potential to pose serious problems in a flowfield; hence they often prove to be a critical - or even design limiting - issue for many aerospace applications. This is the first book devoted solely to a comprehensive, state-of-the-art explanation of this phenomenon. It includes a description of the basic fluid mechanics of SBLIs plus contributions from leading international experts who share their insight into their physics and the impact they have in practical flow situations. This book is for practitioners and graduate students in aerodynamics who wish to familiarize themselves with all aspects of SBLI flows. It is a valuable resource for specialists because it compiles experimental, computational and theoretical knowledge in one place.
An experimental investigation of the effects of leading edge geometry on the dynamics of blunt fin-induced shock wave turbulent boundary layer interaction
Title | An experimental investigation of the effects of leading edge geometry on the dynamics of blunt fin-induced shock wave turbulent boundary layer interaction PDF eBook |
Author | Kelly Kleifges |
Publisher | |
Pages | 162 |
Release | 1993 |
Genre | Leading edges (Aerodynamics) |
ISBN |
An Experimental Investigation of the Effects of Leading Edge Geometry on the Dynamics of Blunt Fin-induced Shock Wave Turbulent Boundary Layer Interaction
Title | An Experimental Investigation of the Effects of Leading Edge Geometry on the Dynamics of Blunt Fin-induced Shock Wave Turbulent Boundary Layer Interaction PDF eBook |
Author | Kelly Kleifges |
Publisher | |
Pages | 0 |
Release | 1993 |
Genre | Leading edges (Aerodynamics) |
ISBN |