Axisymmetric Coanda-assisted vectoring

Allen, Dustin; Smith, Barbara

doi:10.1007/s00348-008-0536-y

Cited by 27 publications

(12 citation statements)

References 30 publications

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“…Other more effective system to produce an enhanced Coanda effect is the one passed on the pilot jet. It is based on the testing architecture developed both by A. K. Postma, J. D. Smith and D. S. Trent [6], and Juvet [7]. This architecture is named by Smith as Enhanced Coanda Effect [8].…”

Section: Enhanced Coanda Effect With Control Jetsmentioning

confidence: 99%

Coanda Synthetic Jet Deflection Apparatus and Control

Trancossi¹,

Dumas²

2011

SAE Technical Paper Series

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This paper presents the theoretic and numerical background of a recent patent about an innovative Coanda Effect application. This innovative jet is designed to enhance the controllability of the system and to encompass static deflection of the fluid jet but especially the dynamic variation of the Coanda deflection with a very low inertia. This innovative nozzle is formerly named H.O.M.E.R., acronym of “High-speed Orienting Momentum with Enhanced Reversibility”. H.O.M.E.R. constitutes an application based on a dual propeller system. It explains how a vector controllable flux can be produced, with the ability to change angular position dynamically as a function of momentum (or velocity) of the two primitive streams. CFD based simulation in a configuration is provided and main calculations are produced to define the control model. Nozzle design guidelines are provided. The proposed system can be used both for aeronautical naval propulsion and industrial applications

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Section: Enhanced Coanda Effect With Control Jetsmentioning

confidence: 99%

Coanda Synthetic Jet Deflection Apparatus and Control

Trancossi¹,

Dumas²

2011

SAE Technical Paper Series

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“…Interessant ist auch das sog. CSM ( Coandă‐assisted spray manipulation )‐Verfahren , . So existieren Düsen mit abgerundeter Mündung, die im Mündungsbereich dem Hauptstrahl einen sog.…”

Section: Diskussionunclassified

Radial Diffusers – Simulation of Three‐Dimensional Flow Effects with CFD (Part 2)

Findeisen

Urbaneck

Platzer

2018

Chemie Ingenieur Technik

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Radialdiffusoren dienen der Be‐ und Entladung von thermischen Speichern und beeinflussen erheblich die Ausbildung der thermischen Schichtung. Der Beitrag beschäftigt sich mit dreidimensionalen Strömungseffekten während des Schichtungsaufbaus in einem Warmwasserspeicher. Über dem Umfang des Radialdiffusorauslasses kann eine ungleich verteilte Ausströmung auftreten, die mit einer stärkeren Vermischung als bei einer rotationssymmetrischen Ausströmung einhergeht. Die Ursachen für diesen Effekt werden erläutert und Gegenmaßnahmen in Teil 3 der Veröffentlichungsreihe vorgestellt.

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“…In short, the maximum blowing velocity allowed so that the jet will remain attached to the surface of the cylindrical ramp is based on Lowry's empirical equation for the maximum pressure difference: (12) And hence (13) where R gas is the perfect gas constant (the symbol is changed in order to avoid the confusion with the geometric radius R of the ramp) k is the specific heat ratio of the gas Lastly, another addition to the model can be the empirical equation provided by Newman Ref [28]for estimating the boundary layer separation which is valid for h/R ratios less or equal to 10% -which covers the CEVA model. …”

Section: The Proposed Modelmentioning

confidence: 99%