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Titlebook: IUTAM Symposium on Nonlinear Instability and Transition in Three-Dimensional Boundary Layers; Proceedings of the I Peter W. Duck,Philip Hal

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書目名稱IUTAM Symposium on Nonlinear Instability and Transition in Three-Dimensional Boundary Layers
副標(biāo)題Proceedings of the I
編輯Peter W. Duck,Philip Hall
視頻videohttp://file.papertrans.cn/461/460615/460615.mp4
叢書名稱Fluid Mechanics and Its Applications
圖書封面Titlebook: IUTAM Symposium on Nonlinear Instability and Transition in Three-Dimensional Boundary Layers; Proceedings of the I Peter W. Duck,Philip Hal
描述Most fluid flows of practical importance are fullythree-dimensional, so the non-linear instability properties ofthree-dimensional flows are of particular interest. In some cases thethree-dimensionality may have been caused by a finite amplitudedisturbance whilst, more usually, the unperturbed state isthree-dimensional. Practical applications where transition is thoughtto be associated with non-linearity in a three- dimensional flowarise, for example, in aerodynamics (swept wings, engine nacelles,etc.), turbines and aortic blood flow. Here inviscid `cross-flow‘disturbances as well as Tollmien-Schlichting and G?rtler vorticescan all occur simultaneously and their mutual non-linear behaviourmust be understood if transition is to be predicted. The non-linearinteractions are so complex that usually fully numerical or combinedasymptotic/numerical methods must be used. .Moreover, in view of the complexity of the instability processes,there is also a growing need for detailed and accurate experimentalinformation. Carefully conducted tests allow us to identify thoseelements of a particular problem which are dominant. This assists inboth the formulation of a relevant theoretical problem and
出版日期Conference proceedings 1996
關(guān)鍵詞aerodynamics; control; design; dynamics; flows; mixing; stability; turbines; vortices; waves; fluid- and aerod
版次1
doihttps://doi.org/10.1007/978-94-009-1700-2
isbn_softcover978-94-010-7261-8
isbn_ebook978-94-009-1700-2Series ISSN 0926-5112 Series E-ISSN 2215-0056
issn_series 0926-5112
copyrightKluwer Academic Publishers 1996
The information of publication is updating

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Wave Packets Described by the Uniformly Valid Model of Three-Dimensional Boundary Layer in [1,2] is used for the formulation of the mathematical problem. For linear problem integral (Laplace and Fourier) transformations are applied. The main efforts are connected with the construction of solution for large times. The saddle-point method shows that the new model [1,2] describes the con
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The Nonlinear Evolution of Inviscid G?rtler Vortices in 3-D Boundary Layers: The Effects of Non-Domistabilising effect and that, for a weak crossflow, inviscid G?rtier modes possess some of the largest growth rates whilst also being neutral at certain other wavenumbers. Furthermore, these inviscid modes are governed by an equation very similar to the Taylor-Goldstein equation which governs the lin
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On the Secondary Instability of G?rtler Vortices in Three-Dimensional Boundary Layers underlying basic flow is three-dimensional, these modes will eventually be extinguished (perhaps in favour of crossflow vortices). As one might expect at small values of the crossflow parameter the centrifugal vortices persist and it has been found that the most unstable mode is no longer steady. A
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On The Nonlinear Evolution of Gortler Vortices in Curved Mixing Layerss been shown that the situation can support centrifugal instabilities in the form of longitudinal vortices. As these perturbations develop downstream they eventually conform to an asymptotic structure and it is within this régime that we shall discuss their nonlinear evolution. The indirect effect o
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