Theoretical and Experimental Investigation of Vortex Breakdown Final Technical Report 1 June 85 PDF Download
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Author:
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Languages : en
Pages :
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Author:
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Category :
Languages : en
Pages :
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Author: Kyle P. Judd
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Category :
Languages : en
Pages : 107
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Author:
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Category : Aeronautics
Languages : en
Pages : 384
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Author: Ken Chi Kien Cheung
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Category :
Languages : en
Pages : 164
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Author: Luis E. Rodrigues Castro
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Category : Mechanical engineering
Languages : en
Pages : 0
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Author: Sammy Khalil
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Category : Axial flow
Languages : en
Pages : 598
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Author: Charles Lowry Robertson
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Category : Mechanical engineering
Languages : en
Pages :
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Author: Turgut Sarpkaya
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Category : Vortex-motion
Languages : en
Pages : 0
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The results of an experimental investigation of the characteristics of stationary and travelling vortex breakdowns in swirling flow in a diverging cylindrical tube are presented and discussed. Basically, three types of vortex breakdown were observed, viz., double helix, spiral, and axisymmetric breakdown. The type and location of the stationary breakdowns were found to be dependent upon the Reynolds and circulation numbers of the flow. The breakdown bubble responded to gradual and abrupt changes in the upstream and downstream flow conditions in a manner analogous to the hydraulic jump in open-channel flow. The observations reported and the evidence presented revealed unmistakably that the vortex breakdown is a finite transition from a uniform state of swirling flow (supercritical) to one (subcritical) featuring a large standing wave, followed by standing wavelets, of finite amplitude. (Author).
Author: Alain Pelletier
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ISBN:
Category :
Languages : en
Pages : 178
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Author: Gale Edward Treiber
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ISBN:
Category : Mechanical engineering
Languages : en
Pages : 74
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Book Description
The results of an experimental investigation of the effect of adverse pressure gradient on the vortex breakdown phenomenon in a diverging tube are presented. Adverse pressure gradient was found to be as significant in determining the breakdown position as were the previously known parameters of Reynolds and circulation numbers. An approximate momentum analysis for predicting the vortex breakdown position was carried out which appears to hold promise as a breakdown predictor. (Modified author abstract).
