Effect Of Blockage Ratio On Drag And Pressure Distributions For Bodies Of Revolution At Transonic Speeds

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NASA Technical Note

Anonim
NASA Technical Note Book PDF

Author : Anonim
Publisher : Unknown
Page : 586 pages
File Size : 48,7 Mb
Release : 1976
Category : Electronic
ISBN : MINN:31951000846582R

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Effect of Blockage Ratio on Drag and Pressure Distributions for Bodies of Revolution at Transonic Speeds

Lana M. Couch,Cuyler W. Brooks (Jr.)
Effect of Blockage Ratio on Drag and Pressure Distributions for Bodies of Revolution at Transonic Speeds Book PDF

Author : Lana M. Couch,Cuyler W. Brooks (Jr.)
Publisher : Unknown
Page : 116 pages
File Size : 43,5 Mb
Release : 1973
Category : Aerodynamic load
ISBN : UIUC:30112106885517

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Effect of Blockage Ratio on Drag and Pressure Distributions for Bodies of Revolution at Transonic Speeds by Lana M. Couch,Cuyler W. Brooks (Jr.) Pdf

Experimental data were obtained in two wind tunnels for 13 models over a Mach number range from 0.70 to 1.02. Effects of increasing test-section blockage ratio in the transonic region near a Mach number of 1.0 included change in the shape of the drag curves, premature drag creep, delayed drag divergence, and a positive increment of pressures on the model afterbodies. Effects of wall interference were apparent in the data even for a change in blockage ratio from a very low 0.000343 to an even lower 0.000170. Therefore, models having values of blockage ratio of 0.0003 - an order of magnitude below the previously considered safe value of 0.0050 - had significant errors in the drag-coefficient values obtained at speeds near a Mach number of 1.0. Furthermore, the flow relief afforded by slots or perforations in test-section walls - designed according to previously accepted criteria for interference-free subsonic flow - does not appear to be sufficient to avoid significant interference of the walls with the model flow field for Mach numbers very close to 1.0.

Monthly Catalog of United States Government Publications, Cumulative Index

United States. Superintendent of Documents
Monthly Catalog of United States Government Publications Cumulative Index Book PDF

Author : United States. Superintendent of Documents
Publisher : Unknown
Page : 1408 pages
File Size : 44,5 Mb
Release : 1976
Category : United States
ISBN : STANFORD:36105021034173

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Monthly Catalog of United States Government Publications, Cumulative Index by United States. Superintendent of Documents Pdf

NASA Technical Memorandum

Anonim
NASA Technical Memorandum Book PDF

Author : Anonim
Publisher : Unknown
Page : 224 pages
File Size : 45,5 Mb
Release : 1980
Category : Aeronautics
ISBN : MINN:31951000845212T

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NASA Technical Memorandum by Anonim Pdf

Asymptotic and Numerical Methods for Partial Differential Equations with Critical Parameters

H.G. Kaper,Marc Garbey
Asymptotic and Numerical Methods for Partial Differential Equations with Critical Parameters Book PDF

Author : H.G. Kaper,Marc Garbey
Publisher : Springer Science & Business Media
Page : 371 pages
File Size : 49,6 Mb
Release : 2012-12-06
Category : Mathematics
ISBN : 9789401118101

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Asymptotic and Numerical Methods for Partial Differential Equations with Critical Parameters by H.G. Kaper,Marc Garbey Pdf

This volume contains the proceedings of the NATO Advanced Research Workshop on "Asymptotic-induced Numerical Methods for Partial Differ ential Equations, Critical Parameters, and Domain Decomposition," held at Beaune (France), May 25-28, 1992. The purpose of the workshop was to stimulate the integration of asymp totic analysis, domain decomposition methods, and symbolic manipulation tools for the numerical solution of partial differential equations (PDEs) with critical parameters. A workshop on the same topic was held at Argonne Na tional Laboratory in February 1990. (The proceedings were published under the title Asymptotic Analysis and the Numerical Solu.tion of Partial Differ ential Equations, Hans G. Kaper and Marc Garbey, eds., Lecture Notes in Pure and Applied Mathematics. Vol. 130, ·Marcel Dekker, Inc., New York, 1991.) In a sense, the present proceedings represent a progress report on the topic area. Comparing the two sets of proceedings, we see an increase in the quantity as well as the quality of the contributions. 110re research is being done in the topic area, and the interest covers serious, nontrivial problems. We are pleased with this outcome and expect to see even more advances in the next few years as the field progresses.

Transonic Aerodynamics

L. Pamela Cook
Transonic Aerodynamics Book PDF

Author : L. Pamela Cook
Publisher : SIAM
Page : 98 pages
File Size : 42,8 Mb
Release : 1993-01-01
Category : Technology & Engineering
ISBN : 9780898713107

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Transonic Aerodynamics by L. Pamela Cook Pdf

This volume offers exciting results, perspectives, and case studies for the treatment of problems arising in transonic aerodynamics. New advances including triple deck theory, analysis of stagnation at the nose of a body, transonic choked flow, and the transonic area rule are presented. Interest in analyzing the transonic range of flight, its stability properties, and especially the question of designing reduced drag (shockless or weak shock) airfoils keeps growing. Present day commercial aircraft cruise in the transonic range. Mechanical and aeronautical engineers interested in compressible fluid flows, design of optimal wings, and an understanding of transonic flow held about wings and airfoils will find the book invaluable. This book is understandable to those with a knowledge of continuum mechanics (fluids) and asymptotic methods. It is appropriate for graduate courses in aerodynamics and mathematical methods.

The High-speed Frontier

John Vernon Becker
The High speed Frontier Book PDF

Author : John Vernon Becker
Publisher : Unknown
Page : 204 pages
File Size : 53,8 Mb
Release : 1980
Category : Government publications
ISBN : UIUC:30112047353427

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The High-speed Frontier by John Vernon Becker Pdf

NASA Technical Report

United States. National Aeronautics and Space Administration
NASA Technical Report Book PDF

Author : United States. National Aeronautics and Space Administration
Publisher : Unknown
Page : 936 pages
File Size : 48,6 Mb
Release : 1973
Category : Aerodynamics
ISBN : UOM:39015039957116

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NASA Technical Report by United States. National Aeronautics and Space Administration Pdf

NASA Reference Publication

Anonim
NASA Reference Publication Book PDF

Author : Anonim
Publisher : Unknown
Page : 76 pages
File Size : 46,9 Mb
Release : 1979
Category : Astronautics
ISBN : OSU:32435063101117

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NASA Reference Publication by Anonim Pdf

Applied Mechanics Reviews

Anonim
Applied Mechanics Reviews Book PDF

Author : Anonim
Publisher : Unknown
Page : 628 pages
File Size : 49,9 Mb
Release : 1974
Category : Mechanics, Applied
ISBN : UCAL:C2682445

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Applied Mechanics Reviews by Anonim Pdf