Analysis and Modeling of the Vortex Amplifier

Bichara, R. T.; Orner, P. A.

doi:10.1115/1.3571218

Cited by 10 publications

(4 citation statements)

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“…Furthermore, the flow in the vortex chamber shows three different characteristics, and the vortex chamber can be divided into three regions. This feature is similar to that of the vortex chamber model built by Bichara and Orner (1969). Radial velocity increases while radius decreases and then decreases rapidly in some zones whose diameter is equal to that of the nozzle throat.…”

Section: Flow Characteristics In Vortex Chambersupporting

confidence: 78%

“…The interaction between the main vortex core flow and the viscous chamber end wall boundary layers was established with the aid of flow visualization photographs. Bichara and Orner (1969) derived a model that can predict the steady-state input-output characteristics of vortex amplifiers operating in incompressible flow; they correlated this model with experimental data to affect prediction of the influence of operating fluid properties and critical dimensions of vortex valves on the valve characteristics. Woolhouse et al (2001) evaluated the performance of a fluidic vortex amplifier by using computation fluid dynamics (CFD) simulation and model tests with ambient air.…”

Section: Introductionmentioning

confidence: 99%

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Swirl Characteristics of Vortex Valve Variable-Thrust Solid Rocket Motor

Wei

2018

JAFM

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In accordance with the flow characteristics of vortex valve variable-thrust solid rocket motors, a cold flow experimental system based on Particle Image Velocimetry was established. A flow velocity vector diagram of vortex chamber was generated, and the vortex structure was analyzed. The results provided an experimental foundation for numerical simulation. The flow characteristics in vortex chamber and in the throat and divergent sections of the nozzle were modeled and simulated. The flow in the vortex chamber conformed to the complex Rankine vortex, and the flow field was divided into three different zones. The vortex core was the primary influence factor for thrust modulation. The resultant velocity reached Mach number 1 before gas arrived at nozzle throat, and the axial velocity still reached Mach number 1 at nozzle throat. Hence, the axial velocity can be used to judge the occurrence of choking at the nozzle throat. The intensity of swirl flow in divergent section of the nozzle was evidently lower than that in vortex chamber and throat. As a result, a lowpressure zone emerged around the central axis, thereby causing thrust losses.

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Section: Flow Characteristics In Vortex Chambersupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Swirl Characteristics of Vortex Valve Variable-Thrust Solid Rocket Motor

Wei

2018

JAFM

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“…Due to intensive turbulent dissipation, the vortex throttle generates a large pressure drop even though it has a relatively large passageway [12,13,14]. This unique feature is desirable and used in a variety of fields [15,16].…”

Section: Introductionmentioning

confidence: 99%

Clog Retard of a Vortex Throttle Joule-Thomson Cryocooler: Further Experimental Verification

Maytal¹,

Weisend²

2010

AIP Conference Proceedings

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“…Design guidance has been produced by a number of authors [21,30,31,34]. These were fashioned in the late 1960s and 1970s.…”

Section: Vxa S In Other Applicationsmentioning

confidence: 99%

Case study: Vortex amplifier assemblies for glovebox applications containing radiological hazard

Francis

Zhang

Parker³

2011

Proceedings of the Institution of Mechanical Engineers, Part E:

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Operation of gloveboxes containing radiological hazards relies on risks being broadly acceptable. Worker protection is maintained in the event of damage to the containment wall or gloves by a vortex amplifier (VXA). The most recent gloveboxes to be made active at the Sellafield site are protected by a 'Mini-VXA', which is a geometrically scaled down version of the previous standard version. This article describes the assembly that incorporates the mini-VXA. It traces the major innovations in VXA system technology that have been employed on alpha gloveboxes at Sellafield since 1970, culminating in the discovery of high levels of O 2 in gloveboxes protected by the mini-VXA during commissioning of same. Laboratory tests and field trials are reported that were aimed at overcoming the unexpectedly high demand of the mini-VXA for inert gas; and the solution eventually adopted.

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Analysis and Modeling of the Vortex Amplifier

Cited by 10 publications

References 0 publications

Swirl Characteristics of Vortex Valve Variable-Thrust Solid Rocket Motor

Swirl Characteristics of Vortex Valve Variable-Thrust Solid Rocket Motor

Clog Retard of a Vortex Throttle Joule-Thomson Cryocooler: Further Experimental Verification

Case study: Vortex amplifier assemblies for glovebox applications containing radiological hazard

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