Reynolds Number Influences In Aeronautics

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Reynolds Number Influences In Aeronautics

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Author :
language : en
Publisher:
Release Date : 1993

Reynolds Number Influences In Aeronautics written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.

A Survey Of Reynolds Number And Wing Geometry Effects On Lift Characteristics In The Low Speed Stall Region

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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-07-02

A Survey Of Reynolds Number And Wing Geometry Effects On Lift Characteristics In The Low Speed Stall Region written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-02 with categories.

This paper presents a survey of the effects of Reynolds number on the low- speed lift characteristics of wings encountering separated flows at their leading and side edges, with emphasis on the region near the stall. The influence of leading-edge profile and Reynolds number on the stall characteristics of two- dimensional airfoils are reviewed first to provide a basis for evaluating three- dimensional effects associated with various wing planforms. This is followed by examples of the effects of Reynolds number and geometry on the lift characteristics near the stall for a series of three-dimensional wings typical of those suitable for high-speed aircraft and missiles. Included are examples of the effects of wing geometry on the onset and spanwise progression of turbulent reseparation near the leading edge and illustrations of the degree to which simplified theoretical approaches can be useful in defining the influence of the various geometric parameters. Also illustrated is the manner in which the Reynolds number and wing geometry parameters influence whether the turbulent reseparation near the leading edge results in a sudden loss of lift, as in the two-dimensional case, or the formation of a leading-edge vortex with Rs increase in lift followed by a gentle stall as in the highly swept wing case. Particular emphasis is placed on the strong influence of 'induced camber' on the development of turbulent reseparation. R is believed that the examples selected for this report may be useful in evaluating viscous flow solutions by the new computational methods based on the Navier-Stokes equations as well as defining fruitful research areas for the high-Reynolds-number wind tunnels. Polhamus, Edward C. Langley Research Center...

Aerodynamics Of The Model Airplane Airfoil Measurements

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Author : Franz Wilhelm Schmitz
language : en
Publisher:
Release Date : 1967

Aerodynamics Of The Model Airplane Airfoil Measurements written by Franz Wilhelm Schmitz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Aerodynamics categories.

Reynolds Number Effects On The Induced Pressures Of Cylindrical Bodies With Different Nose Shapes And Nose Drag Coefficients In Helium At A Mach Number Of 24

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Author : Richard D. Wagner (Jr.)
language : en
Publisher:
Release Date : 1963

Reynolds Number Effects On The Induced Pressures Of Cylindrical Bodies With Different Nose Shapes And Nose Drag Coefficients In Helium At A Mach Number Of 24 written by Richard D. Wagner (Jr.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1963 with Aerodynamics categories.

Exact inviscid pressure distributions and shock shapes, obtained by the method of characteristics, are compared with experimental data. The results indicate a strong dependence of induced pressures upon Reynolds number, especially in the region immediately downstream of the nose-cylinder junction. The measured shock shapes revealed no discernible effect of Reynolds number variations.

Investigation Of Variation In Base Pressure Over The Reynolds Number Range In Which Wake Transition Occurs For Two Dimensional Bodies At Mach Numbers From 1 95 To 2 92

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Author : Vernon Van Hise
language : en
Publisher:
Release Date : 1959

Investigation Of Variation In Base Pressure Over The Reynolds Number Range In Which Wake Transition Occurs For Two Dimensional Bodies At Mach Numbers From 1 95 To 2 92 written by Vernon Van Hise and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959 with Aerodynamics, Supersonic categories.

The Influence Of Reynolds Number And Atmospheric Effects On Aircraft Wake Vortices Near The Ground

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Author : Zhongquan Charlie Zheng
language : en
Publisher:
Release Date : 1993

The Influence Of Reynolds Number And Atmospheric Effects On Aircraft Wake Vortices Near The Ground written by Zhongquan Charlie Zheng and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Reynolds number categories.

Effects Of Unit Reynolds Number Nose Bluntness And Roughness On Boundary Layer Transition

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Author : J. Leith Potter
language : en
Publisher:
Release Date : 1960

Effects Of Unit Reynolds Number Nose Bluntness And Roughness On Boundary Layer Transition written by J. Leith Potter and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with Boundary layer categories.

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.

Scientific And Technical Aerospace Reports

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Author :
language : en
Publisher:
Release Date : 1995

Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Aeronautics categories.

Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

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

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Author : Benjamin Milwitzky
language : en
Publisher:
Release Date : 1955

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 has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1955 with Aeronautics categories.

Influence Of Reynolds Number And Blade Geometry On Low Pressure Turbine Performance

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Author : Mark Eric Bury
language : en
Publisher:
Release Date : 1997

Influence Of Reynolds Number And Blade Geometry On Low Pressure Turbine Performance written by Mark Eric Bury and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.