A Viscous-Inviscid Channel Flow Approach for Preliminary Wind Tunnel Design PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download A Viscous-Inviscid Channel Flow Approach for Preliminary Wind Tunnel Design PDF full book. Access full book title A Viscous-Inviscid Channel Flow Approach for Preliminary Wind Tunnel Design by John Boerchers. Download full books in PDF and EPUB format.
Author: John Boerchers
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
This thesis will present the development of a quasi-one-dimensional, viscous-inviscid approach to assess the aerodynamic performance of low-speed wind tunnels and its application to the preliminary design of a new wind tunnel. The approach includes numerical integration of the incompressible, quasi-one-dimensional equations of motion coupled with the axisymmetric integral boundary layer equations. The boundary layer model describes the viscous losses necessary for predicting required fan input power. Components such as screens and fans are modeled with discrete changes in the flow variables at specified locations. The approach can be used to assess the aerodynamic performance of a given wind tunnel design to determine the required fan input to overcome viscous losses from the boundary layer and components. Results are provided for the conceptual design of a low-speed wind tunnel for testing turbomachinery. For a fan diameter of 24 inches, a diffuser area ratio of 1.06 provides the maximum test Reynolds number for a 300-horsepower constraint. The results show the utility of the approach for preliminary aerodynamic analysis and design of low-speed wind tunnel designs, enabling rapid design iterations for new wind tunnel designs and assessment of potential design improvements for existing wind tunnels.
Author: John Boerchers
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
This thesis will present the development of a quasi-one-dimensional, viscous-inviscid approach to assess the aerodynamic performance of low-speed wind tunnels and its application to the preliminary design of a new wind tunnel. The approach includes numerical integration of the incompressible, quasi-one-dimensional equations of motion coupled with the axisymmetric integral boundary layer equations. The boundary layer model describes the viscous losses necessary for predicting required fan input power. Components such as screens and fans are modeled with discrete changes in the flow variables at specified locations. The approach can be used to assess the aerodynamic performance of a given wind tunnel design to determine the required fan input to overcome viscous losses from the boundary layer and components. Results are provided for the conceptual design of a low-speed wind tunnel for testing turbomachinery. For a fan diameter of 24 inches, a diffuser area ratio of 1.06 provides the maximum test Reynolds number for a 300-horsepower constraint. The results show the utility of the approach for preliminary aerodynamic analysis and design of low-speed wind tunnel designs, enabling rapid design iterations for new wind tunnel designs and assessment of potential design improvements for existing wind tunnels.
Author: Jorge Colman Lerner
Publisher: BoD – Books on Demand
ISBN: 9533076232
Category : Science
Languages : en
Pages : 728
Get Book Here
Book Description
The book "Wind Tunnels and Experimental Fluid Dynamics Research" is comprised of 33 chapters divided in five sections. The first 12 chapters discuss wind tunnel facilities and experiments in incompressible flow, while the next seven chapters deal with building dynamics, flow control and fluid mechanics. Third section of the book is dedicated to chapters discussing aerodynamic field measurements and real full scale analysis (chapters 20-22). Chapters in the last two sections deal with turbulent structure analysis (chapters 23-25) and wind tunnels in compressible flow (chapters 26-33). Contributions from a large number of international experts make this publication a highly valuable resource in wind tunnels and fluid dynamics field of research.
Author: Noor Ahmed
Publisher: BoD – Books on Demand
ISBN: 9535110470
Category : Science
Languages : en
Pages : 232
Get Book Here
Book Description
This book is intended to be a valuable addition to students, engineers, scientists, industrialists, consultants and others providing greater insight into wind tunnel designs and their enormous research potential. It is a compilation of works from world experts on subsonic and supersonic wind tunnel designs, applicable to a diverse range of disciplines. The book is organised in two sections. The first section comprises of three chapters on various aspects of stationary and portable subsonic wind tunnel designs, followed by one chapter on supersonic wind tunnel and the final chapter discusses a method to address unsteadiness effects of fan blade rotation. The second section contains four chapters regarding wind tunnel applications across a multitude of engineering fields including civil, mechanical, chemical and environmental engineering.
Author: Colin Britcher
Publisher: Academic Press
ISBN: 0128181001
Category : Technology & Engineering
Languages : en
Pages : 672
Get Book Here
Book Description
Wind Tunnel Test Techniques: Design and Use at Low and High Speeds with Statistical Engineering Applications provides an up-to-date treatment of the topic. Beginning with a brief history of wind tunnels and its types and uses, the book goes on to cover subsonic, supersonic and hypersonic wind tunnel design and construction, calibration, boundary corrections, flow quality assessment, pressure surveys, and dynamic testing. It also focuses on wind tunnel facilities, making it useful for both the designer and operator. Engineers and graduate students in aerospace, automotive and similar programs will find this book useful in their work with experimental aerodynamics, gas dynamics, facility design and performance. - Deals with a broad range of flow speeds in wind tunnels, from low speed to high speed - Provides a discussion of similarity laws as well as material on statistical analysis - Includes coverage on facility-to-facility and facility-to-CFD correlation - Presents advanced topics such as cryogenic wind tunnels, ground simulation in automotive testing, and propulsion testing
Author: George M. Stokes
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 60
Get Book Here
Book Description
Author: David C. Wilcox
Publisher:
ISBN:
Category : Fluid dynamic measurements
Languages : en
Pages : 90
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 994
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 892
Get Book Here
Book Description
Author: John E. Lamar
Publisher:
ISBN:
Category : High-speed aeronautics
Languages : en
Pages : 36
Get Book Here
Book Description
This paper summarizes a variety of optically based flow-visualization techniques used for high-speed research by the Configuration Aerodynamics Wind-Tunnel-Test Team of the High-Speed Research Program during its tenure. The work of other national experts is included for completeness. Details of each technique with applications and status in various national wind tunnels are given.
Author: C. Wieselsberger
Publisher:
ISBN:
Category : Air flow
Languages : en
Pages : 594
Get Book Here
Book Description
The most important aerodynamical qualities that should be aimed at in wind tunnel design, are as follows: 1) constant and parallel direction of flow; 2) uniform velocity across all sections; 3) absence of turbulent motion; 4) constant velocity of flow. The above-mentioned qualities are all realized in a high degree in the Gottingen type of wind tunnel, with a parallel portion before the working section, the cross section of which is steadily reduced. It is shown in what follows, that the system can be applied to other wind tunnels, such as the N.P.L. or Eiffel type.
