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Studies On Three Dimensional Boundary Layers On Bodies Of Revolution I Nose Separation
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Book Synopsis Studies on Three-Dimensional Boundary Layers on Bodies of Revolution. I. Nose Separation by : Tuncer Cebeci
Download or read book Studies on Three-Dimensional Boundary Layers on Bodies of Revolution. I. Nose Separation written by Tuncer Cebeci and published by . This book was released on 1978 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The laminar boundary-layer development near the nose of a body of revolution and a two-dimensional airfoil is investigated until the onset of leading-edge separation. This is accomplished through the use of a coordinate transformation which eliminates any geometrical singularity at the nose in the governing boundary-layer equations. The resulting equations are examined by both asymptotic and numerical means. Comparable cases for the three-dimensional body of revolution and the two-dimensional airfoil are given and similarities as well as differences are discussed. (Author).
Book Synopsis Studies on Three-Dimensional Boundary Layers on Bodies of Revolution. II. Three-Dimensional Laminar Boundary Layers and the OK of Accessibility by : Tuncer Cebeci
Download or read book Studies on Three-Dimensional Boundary Layers on Bodies of Revolution. II. Three-Dimensional Laminar Boundary Layers and the OK of Accessibility written by Tuncer Cebeci and published by . This book was released on 1980 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation is carried out into the structure of the laminar boundary layer originating from the forward stagnation point of a prolate spheroid at incidence in a uniform stream, assuming that the external velocity distribution is given by attached potential theory. The principal new results of the study are: (1) A new transformation of the body coordinates is devised which facilitates the computation of the solution near the nose, (2) Two variations of the standard box method of solving the equations are devised to enable solutions to be computed in regions of cross-flow reversal, (3) Whereas in two dimensional flows the effect of the boundary layer approaching separation on the external flow may be represented by a blowing velocity, in the present study we find that this is only true near the windward line of symmetry, (4) The boundary layer over the whole of the spheroid cannot be computed in an integration from the forward stagnation point. (5) For alpha> or = 15 deg the accessible region on the leeward side of the ok is largely determined by the external streamline through the ok.
Book Synopsis Three-Dimensional Boundary Layers on Bodies of Revolution at Incidence by : V. C. Patel
Download or read book Three-Dimensional Boundary Layers on Bodies of Revolution at Incidence written by V. C. Patel and published by . This book was released on 1978 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the objectives and accomplishments of an experimental and theoretical investigation of the boundary layer development on bodies of revolution at incidence. The results of the flow visualization studies in laminar flow, detailed measurements in a turbulent boundary layer, and calculations of laminar as well as turbulent boundary layers using two different numerical schemes and turbulence models are reviewed to emphasize the important characteristics of separation in three dimensions.
Book Synopsis Studies of Three-Dimensional Boundary Layers on Bodies of Revolution. III. Cones at Incidence in Supersonic Flow by : Tuncer Cebeci
Download or read book Studies of Three-Dimensional Boundary Layers on Bodies of Revolution. III. Cones at Incidence in Supersonic Flow written by Tuncer Cebeci and published by . This book was released on 1982 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation is carried out into the properties of a nonsimiliar boundary layer on a cone at incidence with special reference to the flow near the leeside line of symmetry. The nonsimilarity is induced by allowing suction near the vertex of the cone and the external velocity is given by supersonic inviscid theory. The principal new results of the theory may be expressed in terms of a parameter -k, which is approximately equivalent to the angle of attack of the cone. Three ranges of k have been identified. For small negative values of k, the three-dimensional boundary layer on the cone is smooth everywhere and, once the suction is removed, rapidly approaches a semi-similarity form as the distance from the vertex increases. For more negative values of k the boundary layer is not smooth near the leeside of the cone but can be computed everywhere. The nature of this singularity is partially explained in terms of a collision phenomenon. If k decreases further, separation occurs in computations from the windward side of the cone. The solution develops a singularity along this line provided sufficient care is taken in the calculations. An apparent nonuniqueness in the solution prevents integration from the leeside over the remainder of the region of accessibility.
Book Synopsis Three-Dimensional Turbulent Boundary Layer on a Body of Revolution at Incidence by : V. C. Patel
Download or read book Three-Dimensional Turbulent Boundary Layer on a Body of Revolution at Incidence written by V. C. Patel and published by . This book was released on 1983 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental and theoretical study of three-dimensional boundary layers on bodies of revolution at incidence was conducted during the period May 1980-July 1983. This final report summarizes the technical accomplishments. Reference is made to previous reports and papers resulting from the study and some recent experimental results on the boundary layer in the plane of symmetry and the vortex formation region are presented. One of the primary objectives of this study was to develop instrumentation for the measurement of the mean flow and the Reynolds stresses in three-dimensional turbulent boundary layers, and to use these to supplement the mean-flow measurements made earlier by Ramaprian, Patel and Choi on the combination body at an incidence of 15 degrees.
Book Synopsis Three-Dimensional Laminar Boundary Layer Over Body of Revolution at Incidence. Part VI. General Methods and Results of the Case of High Incidence by : K. C. Wang
Download or read book Three-Dimensional Laminar Boundary Layer Over Body of Revolution at Incidence. Part VI. General Methods and Results of the Case of High Incidence written by K. C. Wang and published by . This book was released on 1973 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents general methods for calculating three-dimensional laminar boundary layers over inclined blunt bodies (not necessarily bodies of revolution). Complete incompressible results for a prolate spheroid at 30 degrees incidence are presented, and the computational procedures are described. The rule of the zone of dependence was observed. The results display for the first time the boundary layer structure over a non-spherical and non-conical blunt body in all details, and confirm the open-type of separation proposed earlier. (Author).
Book Synopsis Preliminary Surveys of the Three Dimensional Boundary Layer on a Yawed, Spinning Body of Revolution by : Walter B. Sturek
Download or read book Preliminary Surveys of the Three Dimensional Boundary Layer on a Yawed, Spinning Body of Revolution written by Walter B. Sturek and published by . This book was released on 1975 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental measurements of the three dimensional boundary layer on a yawed, spinning tangent-ogive-cylinder model in supersonic flow are reported. The measurements were made using a flattened total head probe at one axial station near the base of the model for 10 azimuthal stations about the circumference. The test conditions were: M = 3, angle of attack = 4 deg, omega = 0 and 10,000 RPM. The trends observed in comparing measurements with and without the model spinning were: (1) the boundary layer is more thick and less full where surface spin opposes the crossflow velocity; and (2) the boundary layer is less thick and more full where surface spin is in the same direction as the crossflow velocity. (Author).
Book Synopsis Three-Dimensional Laminar Boundary Layer Over Body of Revolution at Incidence. Part V. Further Investigation Near the Plane of Symmetry by : Kuo C. Wang
Download or read book Three-Dimensional Laminar Boundary Layer Over Body of Revolution at Incidence. Part V. Further Investigation Near the Plane of Symmetry written by Kuo C. Wang and published by . This book was released on 1971 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: The previously investigated three-dimensional boundary layer near the plane of symmetry of an inclined spheroid is extended along three directions: wider range of solutions, explanations to questions left unanswered before, and comparisons with experiments. Extended solutions provide more complete trends for incidences from zero to 90 degrees and for thickness ratios ranging from unity for a sphere to nearly zero for a long inclined sylinder. Among these trends is how the separation changes from one type to another and then back again with increasing incidence. Explanations are given for a number of unconventional features; included here is why the lateral derivative of the cross velocity profile reverses. Agreement with Wilson's recent experiments (designed specifically for partial check of the results obtained earlier) enhances the significance of the investigation undertaken.
Book Synopsis Three-dimensional Boundary Layers on Bodies of Revolution at Incidence by : Do-Hyung Choi
Download or read book Three-dimensional Boundary Layers on Bodies of Revolution at Incidence written by Do-Hyung Choi and published by . This book was released on 1978 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis "Similar" Three-dimensional Boundary Layers by : Theo Geis
Download or read book "Similar" Three-dimensional Boundary Layers written by Theo Geis and published by . This book was released on 1961 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stagnation Point Fluctuations and Boundary Layer Stability for Bodies of Revolution with Hemispherical Noses by : Arnold M. Kuethe
Download or read book Stagnation Point Fluctuations and Boundary Layer Stability for Bodies of Revolution with Hemispherical Noses written by Arnold M. Kuethe and published by . This book was released on 1960 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Boundary Layers and Separation Patterns on a Body of Revolution at Incidence by : H. U. Meier
Download or read book Development of Boundary Layers and Separation Patterns on a Body of Revolution at Incidence written by H. U. Meier and published by . This book was released on 1982 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Detailed measurements in three-dimensional boundary layers and separated flow fields, developing on a prolate spheroid, are presented. The discussion is concentrated on the possible topological structure of separation patterns resulting from laminar or turbulent boundary layer flows. A hypothesis about the transition from an unsteady two-dimensional axisymmetric flow separation into a steady three-dimensional vortex flow is established. (Author).
Book Synopsis Turbulent Boundary-layer Separation Induced by Flares on Cylinders at Zero Angle of Attack by : Donald M. Kuehn
Download or read book Turbulent Boundary-layer Separation Induced by Flares on Cylinders at Zero Angle of Attack written by Donald M. Kuehn and published by . This book was released on 1961 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Three-Dimensional Laminar Boundary Layer Over Body of Revolution at Incidence. Part VII. The Extremely High Incidence Case by : K. C. Wang
Download or read book Three-Dimensional Laminar Boundary Layer Over Body of Revolution at Incidence. Part VII. The Extremely High Incidence Case written by K. C. Wang and published by . This book was released on 1973 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents results of exact, full three-dimensional solutions of the incompressible laminar boundary layer over a prolate spheroid at an extremely high incidence. In contrast to the high incidence (30 degrees) case recently reported, this extremely high incidence (45 degrees) problem is characterized by features reflecting the predominance of the circumferential flow over the meridional flow and, more importantly, by a closed, rather than an open, separation pattern. These features include much larger circumferential skin friction than meridional skin friction and that the limiting streamlines are more closely oriented along the parallels. (Author).
Book Synopsis Topics in Boundary Element Research by : C. A Brebbia
Download or read book Topics in Boundary Element Research written by C. A Brebbia and published by . This book was released on 1984 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Calculation of Three-Dimensional Boundary Layers on Bodies of Revolution at Incidence by : Tuncer Cebeci
Download or read book Calculation of Three-Dimensional Boundary Layers on Bodies of Revolution at Incidence written by Tuncer Cebeci and published by . This book was released on 1978 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: The laminar three-dimensional boundary layer on a body of revolution at incidence is investigated using two methods. In the first, the standard equations are solved numerically using the Keller box scheme. The second method solves a set of equations, which contain the standard equations, derived from the assumption that crossflow gradients may be important. Since these equations are elliptic in the crossflow plane, an ADI procedure is used for their solution. In regions where there is no crossflow reversal, both methods yield the same results. However, differences appear in regions where the crossflow is not unidirectional. Reasons for this discrepancy are discussed and the relative merits of each procedure identified. (Author).
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1978 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
