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Supersonic Separated Flow Downstream Of A Backward Facing Step
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Book Synopsis Supersonic Separated Flow Downstream of a Backward Facing Step by : Donald R. Crawford
Download or read book Supersonic Separated Flow Downstream of a Backward Facing Step written by Donald R. Crawford and published by . This book was released on 1967 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: The method of integral relations is applied to the study of the viscous separated flow field downstream of a backward facing step in laminar supersonic flow. The boundary layer equations are reduced to a set of coupled ordinary differential equations in a formulation which incorporates a two parameter velocity profile. The neighborhood of the corner and the reattachment point are examined in detail, taking into account the proper interaction between the viscous and inviscid flow. The complete flow field in these regions is found from the analyses of the limiting forms of the equations. In particular, it is found that the pressure gradient and thickness of the boundary layer at the reattachment point are related and cannot be arbitrarily specified. (Author).
Book Synopsis SUPERSONIC FLOW SEPARATION ON A BACKWARD FACING STEP. by :
Download or read book SUPERSONIC FLOW SEPARATION ON A BACKWARD FACING STEP. written by and published by . This book was released on 1966 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paper describes an experimental survey of flow separation on backward facing steps having different heights at a Mach number of 2.4. Reattachment and critical points are found for three regimes, laminar, transitional, and turbulent. Reattachment occurs at a point where the pressure is 35% of the free stream value for turbulent flow, and 60% of this value in the laminar case. The length of the free shear layer is found to be one-half that of the separating streamline, a result which emphasizes the importance of the reattachment region. The flow downstream of the critical point is found to be relatively independent of the base flow. Disturbances in the spanwise direction are always observed in laminar flow but do not affect the base pressure.
Book Synopsis Supersonic Flow Separation on a Backward Facing Step by : Abdallah Antoun Sfeir
Download or read book Supersonic Flow Separation on a Backward Facing Step written by Abdallah Antoun Sfeir and published by . This book was released on 1966 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computational Study of Supersonic Flow Over Backward-Facing Steps at High Reynolds Number by : Odus R. Burggraf
Download or read book Computational Study of Supersonic Flow Over Backward-Facing Steps at High Reynolds Number written by Odus R. Burggraf and published by . This book was released on 1970 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of laminar separated flow over a backward-facing step is solved numerically for the limiting case of infinite Reynolds number. The flow model adopted is that deduced by Batchelor for incompressible flow: an inviscid rotational eddy confined within the recirculation portion of the separated shear layer. It is argued that the reattachment process is essentially inviscid in the limit R approaches infinity, and the flow field in the reattachment zone is computed on this basis. The computed results support Chapman's model of the reattachment process as the correct limit case, to second-order accuracy, as the flow angle entering the reattachment zone approaches zero. For the recirculation zone, the boundary-layer equations are simplified by assuming a constant pressure eddy. The Dorodnitsyn transformation is applied and numerical solutions obtained using an implicit finite-difference scheme. The solutions are carried out from station-to-station in the direction of flow over a complete cycle of recirculation. Iteration yields the unique value of the vorticity in the inviscid layer upstream of separation, including the effects of corner expansion and recirculation on the development of the separated shear layer. (Author).
Book Synopsis Separation and Reattachment of Supersonic Turbulent Boundary Layer Behind Down Stream Facing Steps and Over Cavities by : G. J. Thomke
Download or read book Separation and Reattachment of Supersonic Turbulent Boundary Layer Behind Down Stream Facing Steps and Over Cavities written by G. J. Thomke and published by . This book was released on 1964 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface pressure measurements were obtained for the flow regimes created when a turbulent boundary layer in supersonic flow separates over the classical downstream-facing step and over a cavity. The experiments were conducted in the Mach number range 2.0 to 4.0 on a model having a ducted, one-foot diameter, axisymmetric body. The model provided step heights of 0.250, 1.020, and 1.675 inches, cavity lengths of 0.837 and 1.675 inches, and a cavity depth of 1.675 inches. The recompression shoulder of the cavity had either a square or a rounded shape. In general, the pressure rise at reattachment is found to be in good agreement with Korst's theory. The shape and scale of the reattachment pressure distribution are influenced considerably by Mach number. Reattachment occurs at a point where the pressure rise is about 50% complete. A point of flow reversal is found to be located upstream of the reattachment point. (Author).
Book Synopsis Experimental Investigation of Supersonic Flow Separation Over a Rearward Facing Step by : Jain-Ming Wu
Download or read book Experimental Investigation of Supersonic Flow Separation Over a Rearward Facing Step written by Jain-Ming Wu and published by . This book was released on 1970 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Unsteady Reattachment of Supersonic Flow Past a Backward-facing Step by : Kaveh Taghavi
Download or read book Unsteady Reattachment of Supersonic Flow Past a Backward-facing Step written by Kaveh Taghavi and published by . This book was released on 1988 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Flow Field and Heat Transfer Downstream of a Rearward Facing Step in Supersonic Flow by : Howard E. Smith
Download or read book The Flow Field and Heat Transfer Downstream of a Rearward Facing Step in Supersonic Flow written by Howard E. Smith and published by . This book was released on 1967 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation of the flow field, and the model pressure and steady-state heat transfer distributions for a rearward-facing step in supersonic flow is described. Tests were conducted using a water-cooled model with a step height adjustable to 0.443 and 0.750 inches at free stream Mach numbers of 2.5, 3.5, and 5.0, and at Reynolds numbers based on length of surface ahead of separation of approximately 250,000 to 1,800,000. It was found that the Reynolds number based on step height is an important parameter and that both the base pressure and the maximum heat transfer at reattachment may be predicted as a function of this parameter. Several representative flow fields are presented along with analyses of the various regions of these fields. It was found that the depressed base pressure is communicated upstream of the step through the subsonic portion of the attached boundary layer resulting in a pressure gradient immediately upstream of the step. It is shown that the rapid corner expansion is not the commonly used Prandtl-Meyer expansion, but rather is accurately described by the method of inviscid rotational characteristics which accounts for both the entropy gradient in the boundary layer and the pressure gradient upstream of the step. This description of the corner expansion also accurately predicts the position of the lip shock associated with the rapid expansion.
Book Synopsis Supersonic Flow Over an Axisymmetric Backward Facing Step by : Eric Loth
Download or read book Supersonic Flow Over an Axisymmetric Backward Facing Step written by Eric Loth and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Separated Flow Behind a Rearward Facing Step at Supersonic Speeds by : Philip O. Jarvinen
Download or read book Separated Flow Behind a Rearward Facing Step at Supersonic Speeds written by Philip O. Jarvinen and published by . This book was released on 1957 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Adaptive Refinement of the Supersonic Flow Over a Backward-facing Step by : S. Y. Yang
Download or read book Adaptive Refinement of the Supersonic Flow Over a Backward-facing Step written by S. Y. Yang and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flow Structure of Supersonic Flow Past Backward-facing Step with Perpendicular Injector by : Akiko Matsuo
Download or read book Flow Structure of Supersonic Flow Past Backward-facing Step with Perpendicular Injector written by Akiko Matsuo and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis LAMINAR SEPARATION IN SUPERSONIC FLOW. by : Jean J. Ginoux
Download or read book LAMINAR SEPARATION IN SUPERSONIC FLOW. written by Jean J. Ginoux and published by . This book was released on 1962 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of three-dimensional flow perturbations in laminar supersonic flows was made on flat plates with sweptback leading edges and in the reattachment region of the flow over flat plates with backward-facing steps. It was shown that a cross-flow existed in the boundary layer on flat plates with supersonic sweptback leading edges of small bluntness, which increased in magnitude from the centerline towards the sides of the models. In separated flows, only an extremely small amount of cross-flow was needed to destabilize the flow and to create regular spanwise variations in total pressure. Larger cross-flows, controlled by a systematic variation of the angle of sweep either of the leading edge or of the edge of the step, had no further effect. Detailed surveys made in a reattaching laminar supersonic flow with a static probe showed that the three-dimensional perturbations that existed in the boundary layer were formed by two layers of equidistant contra-rotating streamwise vortices: one located near the wall and a second one near the outer edge of the boundary layer. (Author).
Book Synopsis Modular Analysis of Supersonic Flow Past a Backward Facing Step by : Seong-Ok Choy
Download or read book Modular Analysis of Supersonic Flow Past a Backward Facing Step written by Seong-Ok Choy and published by . This book was released on 1998 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technical Abstract Bulletin by : Defense Documentation Center (U.S.)
Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1967 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laminar Separation in Supersonic Flow with Emphasis on Three-dimensional Perturbations at Reattachment by : Jean J. Ginoux
Download or read book Laminar Separation in Supersonic Flow with Emphasis on Three-dimensional Perturbations at Reattachment written by Jean J. Ginoux and published by . This book was released on 1960 with total page 774 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Turbulent Shear Layers in Supersonic Flow by : Alexander J. Smits
Download or read book Turbulent Shear Layers in Supersonic Flow written by Alexander J. Smits and published by Springer Science & Business Media. This book was released on 2006-05-11 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: A good understanding of turbulent compressible flows is essential to the design and operation of high-speed vehicles. Such flows occur, for example, in the external flow over the surfaces of supersonic aircraft, and in the internal flow through the engines. Our ability to predict the aerodynamic lift, drag, propulsion and maneuverability of high-speed vehicles is crucially dependent on our knowledge of turbulent shear layers, and our understanding of their behavior in the presence of shock waves and regions of changing pressure. Turbulent Shear Layers in Supersonic Flow provides a comprehensive introduction to the field, and helps provide a basis for future work in this area. Wherever possible we use the available experimental work, and the results from numerical simulations to illustrate and develop a physical understanding of turbulent compressible flows.
