Design and Development of Wind Tunnel for Contraction Ratio Effects to the Velocity and Boundary Layer Thickness PDF Download
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Author: Norlizaa Mohamad
Publisher:
ISBN:
Category : Buildings
Languages : en
Pages : 65
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Book Description
Wind tunnel is one of the tools that used in the aerodynamics research to recognize the air flow moving through a solid. It is not only been used in automotive but also in the construction of the building. Develop of the wind tunnel require specific parameters that need to be consider. Parameters such as contraction ratio and diffuser angle plays an important role to obtain a good result to the model. To have a better understanding about thermo fluids, the development of low speed wind tunnel are required. From the subsonic wind tunnel, the study is to determine the best contraction ratio of the flow quality of the air in the exit. The study is conducted by fabricate the low speed wind tunnel and by using Computational Fluids Dynamic (CFD) to obtain the data for different contraction ratio. The varying velocity and the boundary layer thickness between different contraction ratio will be attempted. The selection of the contraction ratio in designing the wind tunnel can affect the fluids flow. As the higher contraction ratio, the higher velocity at the test section can be obtained, reduced power loss and thin thickness of the boundary layer can achieved.
Author: Norlizaa Mohamad
Publisher:
ISBN:
Category : Buildings
Languages : en
Pages : 65
Get Book Here
Book Description
Wind tunnel is one of the tools that used in the aerodynamics research to recognize the air flow moving through a solid. It is not only been used in automotive but also in the construction of the building. Develop of the wind tunnel require specific parameters that need to be consider. Parameters such as contraction ratio and diffuser angle plays an important role to obtain a good result to the model. To have a better understanding about thermo fluids, the development of low speed wind tunnel are required. From the subsonic wind tunnel, the study is to determine the best contraction ratio of the flow quality of the air in the exit. The study is conducted by fabricate the low speed wind tunnel and by using Computational Fluids Dynamic (CFD) to obtain the data for different contraction ratio. The varying velocity and the boundary layer thickness between different contraction ratio will be attempted. The selection of the contraction ratio in designing the wind tunnel can affect the fluids flow. As the higher contraction ratio, the higher velocity at the test section can be obtained, reduced power loss and thin thickness of the boundary layer can achieved.
Author: Noor Ahmed
Publisher: BoD – Books on Demand
ISBN: 9535110470
Category : Science
Languages : en
Pages : 232
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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:
Publisher:
ISBN:
Category :
Languages : en
Pages : 44
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Book Description
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722129330
Category :
Languages : en
Pages : 40
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Book Description
An iterative design procedure was developed for two- or three-dimensional contractions installed on small, low-speed wind tunnels. The procedure consists of first computing the potential flow field and hence the pressure distributions along the walls of a contraction of given size and shape using a three-dimensional numerical panel method. The pressure or velocity distributions are then fed into two-dimensional boundary layer codes to predict the behavior of the boundary layers along the walls. For small, low-speed contractions it is shown that the assumption of a laminar boundary layer originating from stagnation conditions at the contraction entry and remaining laminar throughout passage through the successful designs if justified. This hypothesis was confirmed by comparing the predicted boundary layer data at the contraction exit with measured data in existing wind tunnels. The measured boundary layer momentum thicknesses at the exit of four existing contractions, two of which were 3-D, were found to lie within 10 percent of the predicted values, with the predicted values generally lower. From the contraction wall shapes investigated, the one based on a fifth-order polynomial was selected for installation on a newly designed mixing layer wind tunnel. Bell, James H. and Mehta, Rabindra D. Unspecified Center NCC2-294; RTOP 505-60-31...
Author: Joint Institute for Aeronautics and Acoustics
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
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Book Description
Author: Jewel B. Barlow
Publisher: John Wiley & Sons
ISBN: 0471557749
Category : Technology & Engineering
Languages : en
Pages : 738
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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.
Author: Joint Institute for Aeronautics and Acoustics. Joint Institute for Aeronautics and Acoustics
Publisher:
ISBN:
Category :
Languages : en
Pages : 36
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Book Description
Author: North Atlantic Treaty Organization. Advisory Group for Aeronautical Research and Development. Wind Tunnel and Model Testing Panel. Meeting
Publisher:
ISBN:
Category : Wind tunnel models
Languages : en
Pages : 338
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Book Description
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Fluid Dynamics Panel. Symposium
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 452
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Book Description
Author: Jorge Colman Lerner
Publisher: BoD – Books on Demand
ISBN: 9533076232
Category : Science
Languages : en
Pages : 728
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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.
