Quasi-Three-Dimensional Supersonic Viscid/Inviscid Interactions Including Separation Effects PDF Download
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Author: Veer N. Vatsa Publisher: ISBN: Category : Languages : en Pages : 95
Book Description
This study is concerned with viscous/inviscid interactions in two and quasi-three-dimensional supersonic flows with separation. Interaction effects are modeled through the so called 'displacement body concept', wherein it is assumed that the inviscid flow 'sees' an effective body obtained by adding the displacement thickness to the original surface. The governing equations in the viscous region are taken to be the interacting boundary-layer equations and an alternating-direction-implicit (ADI) finite difference scheme is employed to obtain their solution. This technique is applied to the quasi-three-dimensional problems resulting from flow past swept (yawed) and axisymmetric compression surfaces. Detailed distributions of surface pressure, skin friction and heat-transfer are presented for Mach numbers of 2 to 6. It is found that both cross flow and axisymmetric effects are easily accommodated in the solution technique and that the predicted results are in qualitative and quantitative agreement with available experimental data.
Author: Veer N. Vatsa Publisher: ISBN: Category : Languages : en Pages : 95
Book Description
This study is concerned with viscous/inviscid interactions in two and quasi-three-dimensional supersonic flows with separation. Interaction effects are modeled through the so called 'displacement body concept', wherein it is assumed that the inviscid flow 'sees' an effective body obtained by adding the displacement thickness to the original surface. The governing equations in the viscous region are taken to be the interacting boundary-layer equations and an alternating-direction-implicit (ADI) finite difference scheme is employed to obtain their solution. This technique is applied to the quasi-three-dimensional problems resulting from flow past swept (yawed) and axisymmetric compression surfaces. Detailed distributions of surface pressure, skin friction and heat-transfer are presented for Mach numbers of 2 to 6. It is found that both cross flow and axisymmetric effects are easily accommodated in the solution technique and that the predicted results are in qualitative and quantitative agreement with available experimental data.
Author: M. H. Bloom Publisher: ISBN: Category : Languages : en Pages : 54
Book Description
The paper presents results of analysis and experiment bearing on three-dimensional effects in hypersonic interaction, with emphasis on a sharp-edged rectangular corner intersection aligned with the flow and a sharp-edged plate of finite span. A powerful tool for dealing with such complex problems is the 'merged-layer approximation' which obviates the need for complicated matching procedures in many instances of importance although numerical computation is required. This type of flow, in which various elements are strongly coupled and even merged, is shown to have features in common with low-speed three-dimensional boundary layers such as those along an interior corner or along the edge of a quarter-infinite plate. In the low speed cases the essential viscous-inviscid interaction coupling enters through the weak, Reynolds-number dependent, displacements of the inviscid flow which must be taken into account even to lowest order. The attendant analytics and numerics are in many respects more difficult to deal with than those of the hypersonic counterparts. (Author).
Author: AEROSPACE RESEARCH LABS WRIGHT-PATTERSON AFB OHIO. Publisher: ISBN: Category : Languages : en Pages : 566
Book Description
The symposium focused on departures from the classical boundary layer theories toward shock wave-boundary layer interactions with their attendant flow separation and reattachment and toward the three-dimensional viscous interactions of practical configurations. It thus dealt with one of the key problem areas associated with high speed supersonic aircraft, lifting-reentry vehicles, and potential hypersonic cruise vehicles. Such configurations are highly three-dimensional with complex flows involving strong viscous-inviscid interactions in regions of compression such as in air breathing engine inlets, at wing-body junctions, and over control surfaces. (Author).
Author: Veer N. Vatsa
Author: Veer N. Vatsa
Author: Veer N. Vetsa
Author: Ziqiang Zhu
Author: M. H. Bloom
Author: AEROSPACE RESEARCH LABS WRIGHT-PATTERSON AFB OHIO.
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