Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and DevelopmentPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Aerodynamic Data Accuracy and Quality - Requirements and Capabilities in Wind Tunnel Testing
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and DevelopmentPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Aerodynamic Data Accuracy and Quality: Requirements and Capabilities in Wind Tunnel Testing
Author: ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRAN CE)Publisher:
ISBN:
Category :
Languages : en
Pages : 532
Book Description
The wind tunnel continues to be the main instrument for providing experimental aerodynamic data for the purpose of load and performance evaluation and for verification of theoretical results. In both cases it is imperative that the user has confidence in the quality of the results, which means that they must have information as to what accuracy to attach to the data. The quality of wind tunnel results depends upon both the accuracy of measurements and the imperfections provided by the wind tunnel environment. It was the purpose of this symposium to try to define what accuracy has presently been achieved in modern facilities and to compare these achievements with the actual demands of the user. Session topics included: Wind tunnel data comparisons; Uncertainties analysis; Drag accuracy achievements; Facility problems; Simulation problems; Progress in testing techniques; Requirements. Keywords: Wind tunnel test methods; West Germany; Great Britain; france; Transonic airfoils; Wing body configurations; Wind tunnel models; Jet transport aircraft; Aerodynamics; Transonic Wind tunnels; Measurement uncertainty; Aerodynamic drag estimates; Civil aviation; Unsteady flow; Wind tunnel nozzle design; Boundary layer interference; Wind tunnel walls; Computational fluid dynamics; Air flow corrections; Reynolds number; Boundary layer transition; Hypersonic wind tunnels; Flow fields; Computerized thermography; Boundary layer separation. NATO furnished. (edc).
Aerodynamic Data Accuracy and Quality
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Fluid Dynamics Panel. SymposiumPublisher:
ISBN:
Category : Aerodynamic load
Languages : en
Pages : 546
Book Description
The wind tunnel continues to be the main instrument for providing experimental aerodynamic data to the aerospace industry and the aerodynamic researcher for the purpose of load and performance evaluation and for verification of theoretical results. In both cases it is imperative that the user has confidence in the quality of the results, which means that he must have information on what accuracy to attach to the data. The quality of wind tunnel results depends upon both the accuracy of measurements and the imperfections provided by the wind tunnel environment. Great strides have been made in recent years on measurement accuracy and as a rule this need no longer be of much concern if properly attended to. However, imperfections provided by the wind tunnel environment are still with us and these are today the main sources affecting the quality and accuracy of aerodynamic data obtained in a wind tunnel. It was the purpose of this symposium to try to define what accuracy has presently been achieved in modern facilities and to compare these achievements with the actual demands of the user.
Aerodynamic Data Accuracy and Quality
Author: AGARD Advisory Report
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and DevelopmentPublisher:
ISBN: 9789283504689
Category : Aerodynamics
Languages : en
Pages : 4
Book Description
Technical Evaluation Report on the Fluid Dynamics Panel Symposium on Aerodynamic Data Accuracy and Quality
Author: Marion L. LasterPublisher:
ISBN: 9789283504689
Category : Aerodynamic load
Languages : en
Pages : 16
Book Description
This report presents a technical evaluation and assessment of the AGARD Fluid Dynamics Panel Symposium on "Aerodynamic Data Accuracy and Quality: Requirements and Capabilities in Wind Tunnel Testing", held in September 1987 in Naples Italy. The major issues addressed were: what data accuracy do users need; what accuracy is presently achieved; and what can be done to improve the situtation? Users have asked the cruise drag be measured to a precision of one drag count for transports and two for military fighters; and it was shown that this is possible when reference methods can be used. However, one or two drag count uncertainlty is not state-of-the-art for the direct scaling concept and improvement will require a thorough understanding of all those parameters which significantly contribute to wind tunnel uncertainty, including bias and precision. A reduction in total uncertainty appears possible but a reduction to a level of one or two drag count also apprears formidable.
Technical Evaluation Report on the Fluid Dynamics Panel Symposium on Aerodynamic Data Accuracy and Quality
Author: NATO. Advisory Group for Aerospace Research & DevelopmentPublisher:
ISBN:
Category :
Languages : en
Pages : 4
Book Description
Scientific and Technical Aerospace Reports
Author: Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 456
Book Description
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.
Wind Tunnel Flow Quality and Data Accuracy Requirements
Author: F. SteinlePublisher:
ISBN: 9789283514404
Category : Wind tunnels
Languages : en
Pages : 26
Book Description
Low-Speed Wind Tunnel Testing
Author: Jewel B. BarlowPublisher: John Wiley & Sons
ISBN: 0471557749
Category : Technology & Engineering
Languages : en
Pages : 738
Book Description
A brand-new edition of the classic guide on low-speed wind tunnel testing While great advances in theoretical and computational methods have been made in recent years, low-speed wind tunnel testing remains essential for obtaining the full range of data needed to guide detailed design decisions for many practical engineering problems. This long-awaited Third Edition of William H. Rae, Jr.'s landmark reference brings together essential information on all aspects of low-speed wind tunnel design, analysis, testing, and instrumentation in one easy-to-use resource. Written by authors who are among the most respected wind tunnel engineers in the world, this edition has been updated to address current topics and applications, and includes coverage of digital electronics, new instrumentation, video and photographic methods, pressure-sensitive paint, and liquid crystal-based measurement methods. The book is organized for quick access to topics of interest, and examines basic test techniques and objectives of modeling and testing aircraft designs in low-speed wind tunnels, as well as applications to fluid motion analysis, automobiles, marine vessels, buildings, bridges, and other structures subject to wind loading. Supplemented with real-world examples throughout, Low-Speed Wind Tunnel Testing, Third Edition is an indispensable resource for aerospace engineering students and professionals, engineers and researchers in the automotive industries, wind tunnel designers, architects, and others who need to get the most from low-speed wind tunnel technology and experiments in their work.