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Definition of vortex boundary using stagnation pressure

Physical Review Fluids
A novel method is proposed to identify vortex boundary and center of rotation based on tubular surfaces of constant stagnation pressure and minimum of the stagnation pressure gradient. The method is derived from Crocco's theorem, which ensures that the gradient of stagnation pressure is orthogonal to both the velocity and vorticity vectors.
Marc Plasseraud, Krishnan Mahesh
openaire   +3 more sources

Model-based stagnation pressure control in a supersonic wind tunnel [PDF]

FME Transactions, 2016
The flow parameters control in wind tunnels is an area of intense research in recent years, with the aim of improving quality and efficiency of the wind tunnel operation.
Ilić Biljana, Miloš Marko, Milosavljević Mirko, Isaković Jovan   +3 more
doaj   +2 more sources

Nonlinear L 1 adaptive control of stagnation pressure in a cryogenic wind tunnel [PDF]

Advances in Aerodynamics, 2020
Cryogenic wind tunnel is a sophisticated aerodynamics ground test facility, which operates in cryogenic temperature with injection of liquid nitrogen. The multi-variable, nonlinear and coupled dynamics existing between the temperature, pressure and Mach ...
Rusong Zhu, Mingwei Xie, Daxiong Liao, Gengsheng Tang, Wen Gai   +4 more
doaj   +2 more sources

A Physical Interpretation of Stagnation Pressure and Enthalpy Changes in Unsteady Flow [PDF]

Volume 7: Turbomachinery, Parts A and B, 2009
This paper provides a physical interpretation of the mechanism of stagnation enthalpy and stagnation pressure changes in turbomachines due to unsteady flow, the agency for all work transfer between a turbomachine and an inviscid fluid. Examples are first given to illustrate the direct link between the time variation of static pressure seen by a given ...
Hodson, H. P., Hynes, T. P., Greitzer, Edward M, Tan, Choon S   +3 more
openaire   +5 more sources

Ram-jet combustion based on shock/flame interaction [PDF]

, 1983
An experimental investigation into the effects of shock/wake and shock/flame interaction on the base pressure of axisymmetric bodies at Mach 2 has been carried out.
Edwards, J. A.
core   +7 more sources

A Pneumatic Probe for Measuring Spatial Derivatives of Stagnation Pressure

Volume 6: Ceramics; Controls, Diagnostics, and Instrumentation; Education; Manufacturing Materials and Metallurgy, 2019
Abstract This paper introduces a pneumatic 9-hole probe which can measure flow angles, stagnation and static pressures, and spatial derivatives of stagnation pressure. It does this through direct measurement at a single location, rather than empirical corrections using measurements at multiple points.
C. J. Clark, S. D. Grimshaw
openaire   +2 more sources

Increase in stagnation pressure and enthalpy in shock tunnels [PDF]

31st Aerospace Sciences Meeting, 1993
A new technique based on the insertion of a converging section in the driven tube is described which is capable of producing substantial increases in both reservoir pressure and enthalpy. A 1D inviscid full kinetics code is used to study a number of different locations and shapes for the converging driven tube section.
DAVID BOGDANOFF, JEAN-LUC CAMBIER
openaire   +1 more source

Investigating the stability of viscoelastic stagnation flows in T-shaped microchannels [PDF]

, 2009
We investigate the stability of steady planar stagnation flows of a dilute polyethylene oxide (PEO) solution using T-shaped microchannels. The precise flow rate control and well-defined geometries achievable with microfluidic fabrication technologies ...
Sousa, P.C., Oliveira, Monica S. N., P. C. Sousa B, M.S.N. Oliveira, M.A. Alves, Oliveira, Monica, Alves, M.A., J. Soulages A, McKinley, G.H., G. H. Mckinley A, Soulage, Johannes, Alves, Manuel A., M. S. N. Oliveira B, McKinley, Gareth H., J. Soulages, M. A. Alves B, G.H. McKinley, Soulages, J., P.C. Sousa, Sousa, P. C.   +19 more
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Study of Effect of Convergence Section Geometric on the Performance of a Sonic Nozzle [PDF]

Journal of Applied Fluid Mechanics
Critical flow Venturi nozzles (toroidal, cylindrical, convergent–divergent, or    C–D) nozzles) have discharge coefficients predicted through numerical and experimental investigations.
F. A. Kassem, A. A. Zahran, M. Adel
doaj   +1 more source

Direct numerical simulation of heat transfer from the stagnation region of a heated cylinder affected by an impinging wake [PDF]

, 2011
Copyright © 2011 Cambridge University Press.The effect of an incoming wake on the flow around and heat transfer from the stagnation region of a circular cylinder was studied using direct numerical simulations (DNSs).
Rodi, W, JAN G. WISSINK, WOLFGANG RODI, Wissink, JG   +3 more
core   +1 more source