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Author : Steven Wayne Raggard
Publisher :
ISBN 13 :
Total Pages : 176 pages
Book Rating : 4.:/5 (685 download)
Download or read book Effects of Roughness on Turbulent Boundary Layers written by Steven Wayne Raggard and published by . This book was released on 1980 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Fanxiao Meng
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (135 download)
Download or read book The Effects of Roughness on Turbulent Boundary Layers written by Fanxiao Meng and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, the effects of roughness on turbulent boundary layers are investigated by both the experimental and analytical methods. Two aspects of roughness are investigated, including the similarity between the smooth and rough turbulent boundary layers, and the characteristics of the flow over the step changes in roughness. Based on the data from the thesis of Akinlade (2005), the validity of three different kinds of outer scales is examined for the defect law in the context of smooth surface and three different types of rough surfaces. Furthermore, a mathematical relation is derived to further investigate the roughness effects. For the second topic, experiments were performed on a smooth-rough-smooth transition in a wind tunnel using a boundary layer Pitot tube. In addition, the growth rates of internal boundary layer thicknesses are determined using the method of Antonia and Luxton (1971, 1972), and the results are compared with the previous studies.
Author : Jinjun Wang
Publisher : Cambridge University Press
ISBN 13 : 1107161568
Total Pages : 293 pages
Book Rating : 4.1/5 (71 download)
Download or read book Flow Control Techniques and Applications written by Jinjun Wang and published by Cambridge University Press. This book was released on 2019 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master the theory, applications and control mechanisms of flow control techniques.
Author : J. Leith Potter
Publisher :
ISBN 13 :
Total Pages : 166 pages
Book Rating : 4.3/5 (91 download)
Download or read book Effects of Unit Reynolds Number, Nose Bluntness, and Roughness on Boundary Layer Transition written by J. Leith Potter and published by . This book was released on 1960 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Condtions encountered in the high Mach number flow regime are show to profoundly affect the longitudinal extent of the boundary layer from beginning to end of transition, the distribution of fluctuation energy in the laminar layer, and effectiveness of surface roughness in promoting transition. A critical layer of intense local energy fluctuations was found at all Mach numbers studied. The existence of such a critical layer is predicted by stability theory. Hot-wire surveys of the laminar, transitional, and turbulent boundary layers are presented to illustrate the critical layer in laminar flow and subsequent development into the transition process. The relation between boundary layer transition on flat plates and cones in supersonic flow is explored and a process for correcting data to account for leading edge bluntness is devised. On the basis of a comparison of data corrected for the effects of leading edge geometry, it is shown that the Reynolds umber of transition on a cone is three times that on a vanishingly thin flate plate. Close agreement between data from various wind tunnels is demonstrated. Study of the effect of finite leading edges yields significant illustrations of the influence of unit Reynolds number on boundary layer transition. A correlation of the effects of surface roughness on transition is achieved. This treatment includes two- and three-dimensional roughness in both subsonic and supersonic streams. At this time only zero pressure gradients have been studied. The entire range of movement of transition from its position with no roughness up to its reaching the roughness element is describable by the procedure give. Examples of application of the correlation results show excellent agreement with experimental data from a variety of sources. Implications concerning tripping hypersonic boundary layers are discussed.
Author : Bagus Nugroho
Publisher :
ISBN 13 :
Total Pages : 219 pages
Book Rating : 4.:/5 (974 download)
Download or read book Highly Ordered Surface Roughness Effects on Turbulent Boundary Layers written by Bagus Nugroho and published by . This book was released on 2015 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : A. A. R. Townsend
Publisher : Cambridge University Press
ISBN 13 : 9780521298193
Total Pages : 450 pages
Book Rating : 4.2/5 (981 download)
Download or read book The Structure of Turbulent Shear Flow written by A. A. R. Townsend and published by Cambridge University Press. This book was released on 1976 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: Develops a physical theory from the mass of experimental results, with revisions to reflect advances of recent years.
Author : Vallampati Ramachandra Prasad
Publisher : BoD – Books on Demand
ISBN 13 : 1839681853
Total Pages : 236 pages
Book Rating : 4.8/5 (396 download)
Download or read book Boundary Layer Flows written by Vallampati Ramachandra Prasad and published by BoD – Books on Demand. This book was released on 2020-01-22 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by experts in the field, this book, "Boundary Layer Flows - Theory, Applications, and Numerical Methods" provides readers with the opportunity to explore its theoretical and experimental studies and their importance to the nonlinear theory of boundary layer flows, the theory of heat and mass transfer, and the dynamics of fluid. With the theory's importance for a wide variety of applications, applied mathematicians, scientists, and engineers - especially those in fluid dynamics - along with engineers of aeronautics, will undoubtedly welcome this authoritative, up-to-date book.
Author : H. H. M. Nigim
Publisher :
ISBN 13 :
Total Pages : 510 pages
Book Rating : 4.F/5 ( download)
Download or read book Effects of Small Isolated Roughness Elements on Turbulent Boundary Layers written by H. H. M. Nigim and published by . This book was released on 1981 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jacob George
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Roughness Effects on Turbulent Boundary Layers written by Jacob George and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Surface Roughness on the Flow Characteristics in a Turbulent Boundary Layer written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : K. R. Czarnecki
Publisher :
ISBN 13 :
Total Pages : 46 pages
Book Rating : 4.:/5 (31 download)
Download or read book Investigation of Effects of Roughness, Surface Cooling, and Shock Impingement on Boundary-layer Transition on a Two-dimensional Wing written by K. R. Czarnecki and published by . This book was released on 1960 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : William J. Monta
Publisher :
ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.:/5 (31 download)
Download or read book Drag Due to Two-dimensional Surface Roughness in a Turbulent Boundary Layer Mach 3 with and Without Heat Transfer written by William J. Monta and published by . This book was released on 1968 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hermann Schlichting (Deceased)
Publisher : Springer
ISBN 13 : 366252919X
Total Pages : 814 pages
Book Rating : 4.6/5 (625 download)
Download or read book Boundary-Layer Theory written by Hermann Schlichting (Deceased) and published by Springer. This book was released on 2016-10-04 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition of the near-legendary textbook by Schlichting and revised by Gersten presents a comprehensive overview of boundary-layer theory and its application to all areas of fluid mechanics, with particular emphasis on the flow past bodies (e.g. aircraft aerodynamics). The new edition features an updated reference list and over 100 additional changes throughout the book, reflecting the latest advances on the subject.
Author : Erika Denise Johnson
Publisher :
ISBN 13 :
Total Pages : 536 pages
Book Rating : 4.:/5 (174 download)
Download or read book A Numerical Study of the Effects of Large Roughness on Turbulent Boundary Layers written by Erika Denise Johnson and published by . This book was released on 2007 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michael L. Finson
Publisher :
ISBN 13 :
Total Pages : 46 pages
Book Rating : 4.:/5 (227 download)
Download or read book Turbulent Boundary Layer Heat Transfer written by Michael L. Finson and published by . This book was released on 1981 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Reynolds stress model for turbulent boundary layers is used to study surface roughness effects on skin friction and heat transfer. The issues of primary interest are the influence of roughness character (element shape and spacing) and the nature of roughness effects at high Mach numbers. Computations based on the model compare satisfactorily with measurements from experiments involving variations in roughness character, in low speed and modestly supersonic conditions. The more limited data base at hypersonic Mach numbers is also examined with reasonable success, although no quantitative explanation is offered for the reduction of heat transfer with increasing roughness observed by Holden at Me = 9.4. The present calculations indicate that the mean velocity is approximately uniform over much of the height range below the tops of the elements, y less than or equal to k. With this constant 'roughness velocity, ' it is simple to estimate the form drag on the elements. This roughness velocity has been investigated by systematically exercising the present model over ranges of potential parameters. The roughness velocity is found to be primarily a function of the projected element frontal area per unit surface area, thus providing a new and simple method for predicting roughness character effects. The model further suggests that increased boundary layer temperatures should be generated by roughness at high edge Mach numbers, which would tend to reduce skin friction and heat transfer, perhaps below smooth wall levels. (Author).
Author : M. L. Finson
Publisher :
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.:/5 (176 download)
Download or read book Study of Turbulent Boundary Layers Over Rough Surfaces, with Emphasis on the Effects of Roughness Character and Mach Number written by M. L. Finson and published by . This book was released on 1982 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Paul F. Holloway
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.:/5 (31 download)
Download or read book Roughness Effects on Boundary-layer Transition for Blunt-leading-edge Plates at Mach 6 written by Paul F. Holloway and published by . This book was released on 1966 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
