Results 11 to 20 of about 62,591 (316)

Impact of the convergent geometric profile on boundary layer separation in the supersonic over-expanded nozzle

open access: yesOpen Physics, 2022
This article aims to conduct a numerical investigation of phenomena induced by gas expansion in chemical propulsion nozzles. A numerical simulation of full-scale flat convergent-divergent nozzle geometry using the finite volume method on structured ...
Dehane Rabie   +6 more
doaj   +1 more source

Study of separation phenomenon in transonic flows produced by interaction between shock wave and boundary layer

open access: yesVietnam Journal of Mechanics, 2011
For compressible flows, the transonic state depends on the geometry, Mach number and the incidence. This effect can produce shock wave. Some studies showed that the interaction between shock wave and boundary layer concerns separation phenomenon. Studies
Hoang Thi Bich Ngoc, Nguyen Manh Hung
doaj   +1 more source

Numerical study of the effect of sidewalls on shock train behaviour

open access: yesFlow, 2023
Strongly coupled sequences of shock waves, known as shock trains, are present in high-speed propulsion systems, where the presence of sidewalls substantially modifies the boundary layer thickness, skin friction and streamwise pressure distribution.
Alexander Gillespie, Neil D. Sandham
doaj   +1 more source

Direct numerical simulation of 'short' laminar separation bubbles with turbulent reattachment [PDF]

open access: yes, 2000
Direct numerical simulation of the incompressible Navier–Stokes equations is used to study flows where laminar boundary-layer separation is followed by turbulent reattachment forming a closed region known as a laminar separation bubble.
Alam, M., Sandham, N.D.
core   +1 more source

Active Boundary Layer Control on a Highly Loaded Turbine Exit Case Profile

open access: yesInternational Journal of Turbomachinery, Propulsion and Power, 2018
A highly loaded turbine exit guide vane with active boundary layer control was investigated experimentally in the High Speed Cascade Wind Tunnel at the University of the German Federal Armed Forces, Munich.
Julia Kurz   +2 more
doaj   +1 more source

Effect of wall temperature on separation bubble size in laminar hypersonic shock/boundary layer interaction flows

open access: yesAdvances in Mechanical Engineering, 2019
At hypersonic speeds, the external wall temperatures of an aerospace vehicle vary significantly. As a result, there is a considerable heat transfer variation between the boundary layer and the wall of the hypersonic vehicle.
Amjad A Pasha, Khalid A Juhany
doaj   +1 more source

Investigation into boundary layer transition using wall-resolved large-eddy simulations and modeled inflow turbulence [PDF]

open access: yesWind Energy Science, 2022
The objective of the present paper is to investigate the transition scenario of the flow around a typical section of a wind turbine blade exposed to different levels of inflow turbulence.
B. A. Lobo   +2 more
doaj   +1 more source

Entrainment and boundary-layer separation: a modeling history [PDF]

open access: yesJournal of Engineering Mathematics, 2017
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Implementation of a correction factor for the Pohlhausen laminar boundary layer applied on the CEVA curved wall jet model [PDF]

open access: yesINCAS Bulletin, 2013
Curved wall jets have many technical applications, ranging from aeronautical circulation controlled wings to micro-fluidics and cryogenics. This paper addresses the issue of correctly estimating the boundary layer separation for laminar curved wall jets.
Valeriu DRAGAN
doaj   +1 more source

The flow structure behind vortex generators embedded in a decelerating turbulent boundary layer [PDF]

open access: yes, 2009
The objective of the present work is to analyse the behaviour of a turbulent decelerating boundary layer under the effect of both passive and active jets vortex generators (VGs).
Braud, Caroline   +3 more
core   +1 more source

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