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Moving Model Test of High-Speed Train Aerodynamic Drag Based on Stagnation Pressure Measurements. [PDF]
PLoS ONE, 2017 A moving model test method based on stagnation pressure measurements is proposed to measure the train aerodynamic drag coefficient. Because the front tip of a high-speed train has a high pressure area and because a stagnation point occurs in the center ...
Mingzhi Yang +4 more
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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 +3 more
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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 +4 more
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Empirical equation of the Mach number as a function of the stagnation pressure ratio for a quasi-one-dimensional compressible flow [PDF]
FME Transactions, 2023 In the present work for a quasi-one-dimensional isentropic compressible flow model, an empirical equation of the Mach number is constructed as a function of the stagnation pressure ratio for an analytical equation that algebraic procedures cannot invert.
Tolentino San Luis
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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 W. Bogdanoff, Jean-Luc Cambier
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Normal pressure hydrocephalus (NPH): ischaemia, CSF stagnation or both [PDF]
Brain, 2004 Normal pressure hydrocephalus (NPH) is a clinical and radiographic syndrome first described by Hakim and Adams in 1965 (Hakim and Adams, 1965) and characterized clinically by gait apraxia (‘magnetic gait’), incontinence and dementia, and diagnosed predominantly among people over the age of 60 years. Only a minority of patients present with the complete
Gerald D. Silverberg
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Mechanism and numerical simulation of pressure stagnation during water jetting perforation [PDF]
Petroleum Science, 2008 When perforating with an abrasive water jet, it is possible that the pressure in the hole (perforation) will be higher than that in the annulus because of water jet blasting against the hole wall, which also is the theoretical basis for the technology of hydro-jet fracturing.
Zhongwei Huang +4 more
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Interaction of two vortices in a flued with lower stagnation pressure [PDF]
Quarterly of Applied Mathematics, 1977 The flow field induced by two point vortices of strength Γ \Gamma at a distance 2 h 2h apart in a quiescent field with lower stagnation pressure is investigated. The flow field around the vortices is bounded by a free streamline with constant velocity U U determined by the ...
Lu Ting
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Volumetric Reconstruction Of Stagnated Wake Structures In Adverse Pressure Gradient [PDF]
Proceedings of the International Symposium on the Application of Laser and Imaging Techniques to Fluid MechanicsTo gather insights about turbulent structures of a wake in adverse pressure gradient, a wind tunnel model is investigated with PIV methods. A flat plate of L = 1.058 m at zero angle of attack is placed in the MUB wind tunnel at TU Braunschweig. The wake convects downstream into a carefully designed diffuser, where it undergoes a pressure increase of ∆c
Till K. Lindner +3 more
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Definition of vortex boundary using stagnation pressure [PDF]
Physical Review FluidsA 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
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