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Author : Harith Vadari
Publisher :
ISBN 13 :
Total Pages : 61 pages
Book Rating : 4.:/5 (482 download)
Download or read book Investigation of the Effect of Airfoil Roughness for Stall Control written by Harith Vadari and published by . This book was released on 2001 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : D. G. Hurley
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (976 download)
Download or read book The Effect of Surface Roughness on the Stalling Characteristics of a Thin Aerofoil written by D. G. Hurley and published by . This book was released on 1952 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : C.J. Davidson
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book The Experimental Investigation of the Effects of Roughness Upon Aerofoil Characteristics at Low Reynolds Numbers written by C.J. Davidson and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Frank T. Abbott
Publisher :
ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.3/5 (126 download)
Download or read book The Effects of Roughness at High Reynolds Numbers on the Lift and Drag Characteristics of Three Thick Airfoils written by Frank T. Abbott and published by . This book was released on 1944 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: In connection with studies of airfoils applicable to large high-speed aircraft, the effects of roughness on three 22-percent-thick airfoils were investigated. The tests were made over a range of Reynolds numbers from about 6,000,000 to 26,000,000 for the airfoils smooth and with roughness strips applied to the surfaces. The results indicated that for the roughened models the scale effect was generally favorable.
Author : K. R. Czarnecki
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.:/5 (317 download)
Download or read book Investigation of Effects of Roughness, Surface Cooling, and Shock Impingement on Boundary-layer Transition on a Two-dimensional Wing written by K. R. Czarnecki and published by . This book was released on 1960 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : O. Schrenk
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.3/5 (91 download)
Download or read book Effect of Roughness on Properties of Airfoils written by O. Schrenk and published by . This book was released on 1926 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first group of a large series of contemplated experiments on the effect of roughness was intended to show the effect of great roughness on airfoils of various sizes and attitudes.
Author : Michael S. Selig
Publisher : Soartech
ISBN 13 :
Total Pages : 320 pages
Book Rating : 4.F/5 ( download)
Download or read book Summary of Low Speed Airfoil Data written by Michael S. Selig and published by Soartech. This book was released on 1995 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Laurence K. Loftin
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.3/5 (126 download)
Download or read book Effects of Specific Types of Surface Roughness on Boundary-layer Transition written by Laurence K. Loftin and published by . This book was released on 1946 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary: Tests were conducted with two typical low-drag airfoils of 90-inch chord to determine the effects of surface projections, grooves, and sanding scratches on boundary-layer transition. The Reynolds number at which a spanwise row of cylindrical projections would cause premature transition was determined for a range of Reynolds number from approximately 3 x 106 to 10 x 106. Data were obtained for projections of various sizes and chordwise locations on both low-drag airfoils. The results were analyzed on the assumption that the critical airfoil Reynolds number for a given projection was a function only of the local-flow conditions around the projection. This assumption neglected possible effects of tunnel turbulence, pressure gradient, boundary-layer Reynolds number, and the original extent of the laminar flow. The data correlated on the basis of this assumption within a range of critical airfoil Reynolds number of ±0.5 x 106 and within a range of projection height of ±0.002 inch. The tests of surface grooves and sanding scratches indicated that, for the range of Reynolds number investigated, the laminar boundary layer was much less sensitive to surface grooves and sanding scratches than to projections above the surface.
Author : Edwin J. Saltzman
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (31 download)
Download or read book Flight Investigation of the Effect of Distributed Roughness on Skin Drag of a Full-scale Airplane written by Edwin J. Saltzman and published by . This book was released on 1959 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michael S. Selig
Publisher :
ISBN 13 :
Total Pages : 424 pages
Book Rating : 4.F/5 ( download)
Download or read book Airfoils at Low Speeds written by Michael S. Selig and published by . This book was released on 1989 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mustafa Serdar Genç
Publisher : BoD – Books on Demand
ISBN 13 : 9535104926
Total Pages : 176 pages
Book Rating : 4.5/5 (351 download)
Download or read book Low Reynolds Number written by Mustafa Serdar Genç and published by BoD – Books on Demand. This book was released on 2012-04-04 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports the latest development and trends in the low Re number aerodynamics, transition from laminar to turbulence, unsteady low Reynolds number flows, experimental studies, numerical transition modelling, control of low Re number flows, and MAV wing aerodynamics. The contributors to each chapter are fluid mechanics and aerodynamics scientists and engineers with strong expertise in their respective fields. As a whole, the studies presented here reveal important new directions toward the realization of applications of MAV and wind turbine blades.
Author : Alan R. Campbell
Publisher :
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4.:/5 (5 download)
Download or read book A Study of the Aerodynamic Feasibility of Dynamic Roughness for Airfoil Separation Control written by Alan R. Campbell and published by . This book was released on 2009 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rush, Olive written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The folder may include clippings, announcements, small exhibition catalogs, and other ephemeral items.
Author :
Publisher :
ISBN 13 :
Total Pages : 179 pages
Book Rating : 4.:/5 (227 download)
Download or read book Numerical Investigation of the Effect of Leading Edge Geometry on Dynamic Stall of Airfoils written by and published by . This book was released on 1990 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dynamic stall of rapidly pitching and oscillating airfoils is investigated by the numerical solution of the full compressible unsteady two- dimensional Navier-Stokes equations using an alternating-direction-implicit scheme. The flow is assumed to be fully turbulent, and the turbulent stresses are modelled by the Baldwin-Lomax eddy viscosity model. Three airfoils (NACA 0012, NACA 0012-33, and NACA 0012-63) are analyzed for the purpose of examining the influence of leading-edge geometry on unsteady flow separation. It is found that a larger leading edge radius, thicker contouring of the forward part of the airfoil, or increasing reduced frequency results in delaying flow separation and formation of the dynamic stall vortex to a higher angle of attack, yielding higher peak Cl. Within the scope of this study, the pressure gradient encountered by the flow at initial separation is found to be independent of reduced frequency and freestream speed. The critical pressure gradient is dependent on leading edge radius and increases for decreasing leading edge radius.
Author : Majid Delpassand
Publisher :
ISBN 13 :
Total Pages : 152 pages
Book Rating : 4.:/5 (129 download)
Download or read book Experimental Investigation of the Surface Roughness Influence on the Wake Characteristics of an Airfoil written by Majid Delpassand and published by . This book was released on 1985 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 1180 pages
Book Rating : 4.:/5 (319 download)
Download or read book Report written by and published by . This book was released on 1957 with total page 1180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722129682
Total Pages : 32 pages
Book Rating : 4.1/5 (296 download)
Download or read book Control of Unsteady Separated Flow Associated with the Dynamic Stall of Airfoils written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The two principal objectives of this research were to achieve an improved understanding of the mechanisms involved in the onset and development of dynamic stall under compressible flow conditions, and to investigate the feasibility of employing adaptive airfoil geometry as an active flow control device in the dynamic stall engine. Presented here are the results of a quantitative (PDI) study of the compressibility effects on dynamic stall over the transiently pitching airfoil, as well as a discussion of a preliminary technique developed to measure the deformation produced by the adaptive geometry control device, and bench test results obtained using an airfoil equipped with the device. Wilder, Michael C. Unspecified Center NCC2-637...
