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Surface Cooling Effects On Compressible Boundary Layer Instability
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722793104 Total Pages :54 pages Book Rating :4.7/5 (931 download)
Book Synopsis Surface-Cooling Effects on Compressible Boundary-Layer Instability by : National Aeronautics and Space Administration (NASA)
Download or read book Surface-Cooling Effects on Compressible Boundary-Layer Instability written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-16 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The influence of surface cooling on compressible boundary layer instability is discussed theoretically for both viscous and inviscid modes, at high Reynolds numbers. The cooling enhances the surface heat transfer and shear stress, creating a high heat transfer sublayer. This has the effect of distorting and accentuating the viscous Tollmien-Schlichting modes to such an extent that their spatial growth rates become comparable with, and can even exceed, the growth rates of inviscid modes, including those found previously. This is for moderate cooling, and it applies at any Mach number. In addition, the moderate cooling destabilizes otherwise stable viscous or inviscid modes, in particular triggering outward-traveling waves at the edge of the boundary layer in the supersonic regime. Severe cooling is also discussed as it brings compressible dynamics directly into play within the viscous sublayer. All the new cooled modes found involve the heat transfer sublayer quite actively, and they are often multi-structured in form and may be distinct from those observed in previous computational and experimental investigations. The corresponding nonlinear processes are also pointed out with regard to transition in the cooled compressible boundary layer. Finally, comparisons with Lysenko and Maslov's (1984) experiments on surface cooling are presented. Seddougui, Sharon O. and Bowles, R. I. and Smith, F. T. Langley Research Center...
Book Synopsis Surface-cooling Effects on Compressible Boundary-layer Instability by : Institute for Computer Applications in Science and Engineering
Download or read book Surface-cooling Effects on Compressible Boundary-layer Instability written by Institute for Computer Applications in Science and Engineering and published by . This book was released on 1990 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Surface Cooling on Compressible Boundary-layer Instability by : Michael Edward Strange
Download or read book The Effect of Surface Cooling on Compressible Boundary-layer Instability written by Michael Edward Strange and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Compressible Laminar Boundary Layer with Fluid Injection by : George M. Low
Download or read book The Compressible Laminar Boundary Layer with Fluid Injection written by George M. Low and published by . This book was released on 1955 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: A solution of the equations of the compressible laminar boundary layer including the effects of transpiration cooling is presented. The analysis applies to the flow over an isothermal porous plate with a velocity of fluid injection proportional to the reciprocal of the square root of the distance from the leading edge.
Book Synopsis Goertler Instability in Compressible Boundary Layers Along Curved Surfaces with Suction and Cooling by : Nabil M. El-Hady
Download or read book Goertler Instability in Compressible Boundary Layers Along Curved Surfaces with Suction and Cooling written by Nabil M. El-Hady and published by . This book was released on 1982 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Distributed Three-dimensional Roughness and Surface Cooling on Boundary-layer Transition and Lateral Spread of Turbulence at Supersonic Speeds by : Albert L. Braslow
Download or read book Effect of Distributed Three-dimensional Roughness and Surface Cooling on Boundary-layer Transition and Lateral Spread of Turbulence at Supersonic Speeds written by Albert L. Braslow and published by . This book was released on 1959 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Relationship Between Transition and Modes of Instability in Supersonic Boundary Layers by : Jamal A. Masad
Download or read book Relationship Between Transition and Modes of Instability in Supersonic Boundary Layers written by Jamal A. Masad and published by . This book was released on 1993 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stability of highly cooled compressible laminar boundary layers by : Louis I. Boehman
Download or read book Stability of highly cooled compressible laminar boundary layers written by Louis I. Boehman and published by . This book was released on 1976 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report shows that wall cooling can be an effective means of increasing the stability of laminar boundary layer flows. The stability of two general classes of cooled boundary layer flows was investigated; shock tube induced boundary layers, and cooled subsonic steady flow boundary layers (such as that on a cooled aerodynamic surface in free flight or in a wind tunnel).
Book Synopsis Theoretical and Analog Studies of the Effects of Nonlinear Stability Derivatives on the Longitudinal Motions of an Aircraft in Response to Step Control Deflections and to the Influence of Proportional Automatic Control by : Benjamin Milwitzky
Download or read book Theoretical and Analog Studies of the Effects of Nonlinear Stability Derivatives on the Longitudinal Motions of an Aircraft in Response to Step Control Deflections and to the Influence of Proportional Automatic Control written by Benjamin Milwitzky and published by . This book was released on 1955 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On the Effect of Boundary Layer Growth on the Stability of Compressible Flows by : Nabil M. El-Hady
Download or read book On the Effect of Boundary Layer Growth on the Stability of Compressible Flows written by Nabil M. El-Hady and published by . This book was released on 1981 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transition, Turbulence and Combustion Modelling by : A. Hanifi
Download or read book Transition, Turbulence and Combustion Modelling written by A. Hanifi and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: This single-volume work gives an introduction to the fields of transition, turbulence, and combustion modeling of compressible flows and provides the physical background for today’s modeling approaches in these fields. It presents basic equations and discusses fundamental aspects of hydrodynamical instability.
Book Synopsis Examination of the Existing Data on the Heat Transfer of Turbulent Boundary Layers at Supersonic Speeds from the Point of View of Reynolds Analogy by : Alvin Seiff
Download or read book Examination of the Existing Data on the Heat Transfer of Turbulent Boundary Layers at Supersonic Speeds from the Point of View of Reynolds Analogy written by Alvin Seiff and published by . This book was released on 1954 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat-transfer data from four wind-tunnel experiments and two free-flight experiments with turbulent boundary layers have been examined to see whether or not they are well represented by the Reynolds analogy or a modification thereof. The heat-transfer results are put into the form of dimensionless Stanton numbers based on fluid properties at the outer edge of the boundary layer and are compared with skin-friction coefficients for the same Mach numbers and wall to free-stream temperature ratios as obtained from an interpolation of the existing skin-friction data. The effective Reynolds number is taken to be the length Reynolds number measured from the effective turbulent origin, a position which differs importantly from the leading edge of the test surface in some cases.
Book Synopsis Monthly Catalogue, United States Public Documents by :
Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1994-04 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technical Note - National Advisory Committee for Aeronautics by : United States. National Advisory Committee for Aeronautics
Download or read book Technical Note - National Advisory Committee for Aeronautics written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1958 with total page 986 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Similar Solutions for the Compressible Boundary Layer on a Yawed Cylinder with Transpiration Cooling by : Ivan E. Beckwith
Download or read book Similar Solutions for the Compressible Boundary Layer on a Yawed Cylinder with Transpiration Cooling written by Ivan E. Beckwith and published by . This book was released on 1959 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat-transfer and skin-friction parameters obtained from exact solutions to the laminar compressible boundary-layer equations for infinite cylinders in yaw are presented. The effects of transpiration cooling, Prandtl number, pressure gradient, wall temperature, and viscosity relation were investigated. It is shown that as the Mach number is increased for a given large yaw angle the effects of pressure gradient become larger and the quantity of coolant required to maintain a given wall temperature is also increased. The use of a linear viscosity-temperature relation gives approximately the same results as the Sutherland viscosity-temperature relation except for very high aerodynamic heating rates.
