Visualization and PIV Measurements of In-Cylinder Axisymmetric Flows

Vucinic, Dean; Hazarika, Birinchi K.; Dinescu, Cristian

doi:10.4271/2001-01-3273

Cited by 3 publications

(1 citation statement)

References 8 publications

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“…10. When a high AC voltage signal, of sufficient amplitude (5-40 kV) and frequency (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20), is applied between the electrodes the intense electric field partially ionizes the surrounding air, producing a non thermal plasma on the dielectric surface. The collisions between the neutral particles and accelerated ions generate a net body force on the surrounding fluid leading to the formation of the so called ionic wind .…”

Section: Preventing Separation In Coanda Nozzles By Plasma Actuatorsmentioning

confidence: 99%

A review of thrust-vectoring in support of a V/STOL non-moving mechanical propulsion system

et al. 2013

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Abstract:The advantages associated to Vertical Short-Take-Off and Landing (V/STOL) have been demonstrated since the early days of aviation, with the initial technolology being based on airships and later on helicopters and planes. Its operational advantages are enormous, being it in the field of military, humanitarian and rescue operations, or even in general aviation. Helicopters have limits in their maximum horizontal speed and classic V/STOL airplanes have problems associated with their large weight, due to the implementation of moving elements, when based on tilting rotors or turbojet vector mechanical oriented nozzles. A new alternative is proposed within the European Union Project ACHEON (Aerial Coanda High Efficiency Orienting-jet Nozzle). The project introduces a novel scheme to orient the jet that is free of moving elements. This is based on a Coanda effect nozzle supported in two fluid streams, also incorporating boundary layer plasma actuators to achieve larger deflection angles. Herein we introduce a state-of-the-art review of the concepts that have been proposed in the framework of jet orienting propulsion systems. This review allows to demonstrate the advantages of the new concept in comparison to competing technologies in use at present day, or of competing technologies under development worldwide.

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Section: Preventing Separation In Coanda Nozzles By Plasma Actuatorsmentioning

confidence: 99%

A review of thrust-vectoring in support of a V/STOL non-moving mechanical propulsion system

et al. 2013

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Numerical and particle image velocimetry characterizations of flow structures under steady state condition

Binjuwair

Ibrahim²,

Wigley³

et al. 2013

World Journal of Engineering

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A combined numerical and experimental study has been carried out to examine the structure of the flow field from a 4 valve cylinder head under steady state conditions. In this paper, Particle Image Velocimetry (PIV) and the finite-volume Computational Fluid Dynamic (CFD) package, STAR CCM+ have been used on a single cylinder Lotus engine head with a pent-roof for a number of fixed valve lifts at two pressure drops of 250 mm and 635 mm of H2O, equivalent to engine speeds of 2,500 and 4,000 RPM respectively. The Reynolds Stress Turbulence Model (RSTM) is used to simulate the turbulent flow structure. The generated mesh is a polyhedral type that holds nearly 3.7 million grid points. The computational results were validated through qualitative and quantitative comparisons with the PIV experimental measurements on both horizontal and vertical cross sections. Results show reasonable agreements between numerical and experimental outcomes for the mean and RMS velocity values at different locations inside the engine cylinder. The nature of the flow structure, together with discussions on the discrepancies observed are presented and discussed.

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In-Cylinder Flow Structure Analysis by Particle Image Velocimetry Under Steady State Condition

Binjuwair

Ibrahim

Wigley

et al. 2012

SAE Technical Paper Series

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Visualization and PIV Measurements of In-Cylinder Axisymmetric Flows

Cited by 3 publications

References 8 publications

A review of thrust-vectoring in support of a V/STOL non-moving mechanical propulsion system

A review of thrust-vectoring in support of a V/STOL non-moving mechanical propulsion system

Numerical and particle image velocimetry characterizations of flow structures under steady state condition

In-Cylinder Flow Structure Analysis by Particle Image Velocimetry Under Steady State Condition

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