Download or read book Investigation of the Effect of Two Dimensional Cavities on Boundary Layers in an Adverse Pressure Gradient written by Richard J. Margason and published by . This book was released on 1996-03-01 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present investigation evaluated one aspect of the feasibility of the use of multiple cavities as an airfoil high-lift device. The effects of cavities on the boundary layer characteristics in several pressure gradients were determined experimentally and computationally. Experimentally, it was found that up to four cavities could be deployed with only a small change to the boundary layer profiles downstream of the cavities and without significantly modifying the resultant streamwise pressure distribution. From the computational results for both of the wind tunnel test section lengths used in the experimental investigation, it was found that a grid which provided a converged solution in less than a few hundred iterations was needed before a reasonable comparison with experimental data could obtained. It was also found for these converged solutions that the appropriate grid clustering and density as well as the cell size required for a satisfactory solution was not always apparent before comparing computational results with experimental data. Overall, the investigation results show that a multiple cavity high-lift concept may be feasible.

Download or read book Investigation Of The Effect of Two Dimensional Cavities On Boundary Layers In An Adverse Pressure Gradient AD 130690 May 30 1997 written by United States. National Aeronautics and Space Administration and published by . This book was released on 1998* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Two dimensional Cavities on the Boundary Layer in an Adverse Pressure Gradient written by Richard J. Margason and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

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:

Download or read book Experimental Investigation of the Effect of a Systematically Varied Adverse Pressure Gradient on the Growth of Turbulent Boundary Layers written by Joseph Alfred Schetz and published by . This book was released on 1960 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Two dimensional Multiple Sine wave Protrusions on the Pressure and Heat transfer Distributions for a Flat Plate at Mach 6 written by Aubrey M. Cary and published by . This book was released on 1968 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1974 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Investigation of Compressible Boundary Layers Under the Influence of Pressure Gradients written by Raymond C. Wier and published by . This book was released on 1996-12-01 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study examined the effect of mild pressure gradients on the mean and turbulent flow of high-speed boundary layers. Three Mach numbers (1.7, 3.0 and 5.0) were investigated. Three pressure gradients were examined; a zero pressure gradient (ZPG), a favorable pressure gradient (FPG), and a combined pressure gradient (CPG). The CPG consisted of an adverse pressure gradient followed by a favorable pressure gradient. Conventional pressure probes, hot- wire and particle image velocimetry (PIV) were used to examine the flow. Measurement included mean velocity, velocity turbulence intensity, mass flux turbulence intensity and energy spectra. Instantaneous (10 nsec) Mie scattering flow visualizations were acquired. Qualitatively, the flow visualizations indicated that the turbulent flow structures were strongly affected by the pressure gradients. For the Mach 2,8 case, the PIV contours and the hot-wire profiles both indicated that the boundary layer thickness increased by 40% and decreased by 100% relative to the ZPG for the favorable and adverse pressure gradients, respectively. Further, the PIV and hot-wire data indicated that the axial turbulence intensity levels increased by 22% for the CPG and decreased by 25% for the FPG. The energy spectra data indicated that once a pressure gradient was applied (favorable or adverse) the low frequency energy increased followed by a rapid decay. Lastly, it was found that nominally 20 to 30 PIV images were sufficient for mean flow boundary layer velocities, but 93 images (the maximum recorded in this study) were insufficient to adequately resolve Reynolds shear stresses.

Download or read book An Experimental Investigation of a Zero Pressure Gradient Two Dimensional Turbulent Boundary Layer written by and published by . This book was released on 1997 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report written by United States. National Bureau of Standards and published by . This book was released on 1968 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Physics Briefs written by and published by . This book was released on 1993 with total page 1206 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NBS Special Publication written by and published by . This book was released on 1969 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Theoretical and Experimental Aerodynamics written by Mrinal Kaushik and published by Springer. This book was released on 2018-12-15 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended as a text for undergraduate and graduate courses in aerodynamics, typically offered to students of aerospace and mechanical engineering programs. It covers all aspects of aerodynamics. The book begins with a description of the standard atmosphere and basic concepts, then moves on to cover the equations and mathematical models used to describe and characterize flow fields, as well as their thermodynamic aspects and applications. Specific emphasis is placed on the relation between concepts and their use in aircraft design. Additional topics of interest to the reader are presented in the Appendix, which draws on the teachings provided in the text. The book is written in an easy to understand manner, with pedagogical aids such as chapter overviews, summaries, and descriptive and objective questions to help students evaluate their progress. Atmospheric and gas tables are provided to facilitate problem solving. Lastly, a detailed bibliography is included at the end of each chapter to provide students with further resources. The book can also be used as a text for professional development courses in aerodynamics.

Download or read book Effect of Passive Venting on Static Pressure Distributions in Cavities at Subsonic and Transonic Speeds written by and published by . This book was released on 1994 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Print Proceedings of the ASME 5th Joint ASME JSME Fluids Engineering Conference FEDSM2007 V 2 July 30 August 2 2007 San Diego California written by American Society of Mechanical Engineers. Fluids Engineering Division. Summer Meeting and published by American Society of Mechanical Engineers. This book was released on 2007 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt: A collection on 226 full-length, peer-reviewed technical papers. It includes topics such as: 15th Forum on Industrial and Environmental Applications of Fluid Mechanics; 7th Forum on the Transport Phenomena in Mixing; and, Forum on Advanced CFD Applications to Transport Phenomena in Nuclear Engineering.

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1999 with total page 1144 pages. Available in PDF, EPUB and Kindle. Book excerpt: