Ordinates and Theoretical Pressure-distribution Data for NACA 6- and 6A-series Airfoil Sections with Thicknesses from 2 to 21 and from 2 to 15 Percent Chord, Respectively PDF Download
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Author: Elizabeth W. Patterson
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 92
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Book Description
Summary: Basic thickness forms of the NACA 63-, 64-, 65- series and NACA 63A-, 64A-, 65 A-series airfoil sections are tabulated for thicknesses of 2, 3, 4, and 5 percent chord. Also presented for these thin airfoil sections are theoretical values of pressures and velocity ratios required to obtain theoretical airfoil pressure distributions. In addition, for each family of airfoil sections, cross plots are presented from which ordinates and pressure distributions can be easily obtained for airfoil sections of thicknesses intermediate to those presented in this report, in NACA Report 824 (from 6 to 21 percent chord for the NACA 6-series), and in NACA Report 903 (from 6 to 15 percent chord for the NACA 6A-series).
Author: Elizabeth W. Patterson
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 92
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Book Description
Summary: Basic thickness forms of the NACA 63-, 64-, 65- series and NACA 63A-, 64A-, 65 A-series airfoil sections are tabulated for thicknesses of 2, 3, 4, and 5 percent chord. Also presented for these thin airfoil sections are theoretical values of pressures and velocity ratios required to obtain theoretical airfoil pressure distributions. In addition, for each family of airfoil sections, cross plots are presented from which ordinates and pressure distributions can be easily obtained for airfoil sections of thicknesses intermediate to those presented in this report, in NACA Report 824 (from 6 to 21 percent chord for the NACA 6-series), and in NACA Report 903 (from 6 to 15 percent chord for the NACA 6A-series).
Author: Willard D. Coles
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 652
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Book Description
Several noise suppressors consisting of combinations of mixing nozzles and ejectors were tested on two full-scale turbojet engines. Maximum sound pressure level reductions of 12 decibels and sound power level reductions of 8 decibels were obtained. The ejectors provided 3 to 5 decibels of the sound power reduction. The effects of ejector dimensions on noise suppression and engine performance were investigated. Ejector lengths of approximately 2.0 standard nozzle diameters and ejector diameters larger than 1.6 standard nozzle diameters provided the greatest additional noise reduction to that obtained with the mixing nozzles alone. The ejector can restore the static thrust loss caused by use of the mixing nozzle or can provide static-thrust augmentation.
Author: United States. National Advisory Committee for Aeronautics
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 496
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Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 158
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 450
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Author: United States. National Aeronautics and Space Administration
Publisher:
ISBN:
Category :
Languages : en
Pages : 448
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Author: Russell M. Cummings
Publisher: Cambridge University Press
ISBN: 1316240290
Category : Technology & Engineering
Languages : en
Pages : 893
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Book Description
This computational aerodynamics textbook is written at the undergraduate level, based on years of teaching focused on developing the engineering skills required to become an intelligent user of aerodynamic codes. This is done by taking advantage of CA codes that are now available and doing projects to learn the basic numerical and aerodynamic concepts required. This book includes a number of unique features to make studying computational aerodynamics more enjoyable. These include: • The computer programs used in the book's projects are all open source and accessible to students and practicing engineers alike on the book's website, www.cambridge.org/aerodynamics. The site includes access to images, movies, programs, and more • The computational aerodynamics concepts are given relevance by CA Concept Boxes integrated into the chapters to provide realistic asides to the concepts • Readers can see fluids in motion with the Flow Visualization Boxes carefully integrated into the text.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 594
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Author: András Sóbester
Publisher: John Wiley & Sons
ISBN: 1118534735
Category : Technology & Engineering
Languages : en
Pages : 276
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Book Description
Optimal aircraft design is impossible without a parametric representation of the geometry of the airframe. We need a mathematical model equipped with a set of controls, or design variables, which generates different candidate airframe shapes in response to changes in the values of these variables. This model's objectives are to be flexible and concise, and capable of yielding a wide range of shapes with a minimum number of design variables. Moreover, the process of converting these variables into aircraft geometries must be robust. Alas, flexibility, conciseness and robustness can seldom be achieved simultaneously. Aircraft Aerodynamic Design: Geometry and Optimization addresses this problem by navigating the subtle trade-offs between the competing objectives of geometry parameterization. It beginswith the fundamentals of geometry-centred aircraft design, followed by a review of the building blocks of computational geometries, the curve and surface formulations at the heart of aircraft geometry. The authors then cover a range of legacy formulations in the build-up towards a discussion of the most flexible shape models used in aerodynamic design (with a focus on lift generating surfaces). The book takes a practical approach and includes MATLAB®, Python and Rhinoceros® code, as well as ‘real-life’ example case studies. Key features: Covers effective geometry parameterization within the context of design optimization Demonstrates how geometry parameterization is an important element of modern aircraft design Includes code and case studies which enable the reader to apply each theoretical concept either as an aid to understanding or as a building block of their own geometry model Accompanied by a website hosting codes Aircraft Aerodynamic Design: Geometry and Optimization is a practical guide for researchers and practitioners in the aerospace industry, and a reference for graduate and undergraduate students in aircraft design and multidisciplinary design optimization.
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1274
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Book Description
