Artificial Development of an Atmospheric Boundary Layer Flow Model in a Wind Tunnel PDF Download
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Author: Fredric A. Godshall
Publisher:
ISBN:
Category : Boundary layer (Meteorology)
Languages : en
Pages : 214
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Book Description
Author: Fredric A. Godshall
Publisher:
ISBN:
Category : Boundary layer (Meteorology)
Languages : en
Pages : 214
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Book Description
Author: Nicholas Jon Spencer-Berger
Publisher:
ISBN:
Category :
Languages : en
Pages : 104
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Book Description
Iowa State University researchers are in the process of developing a new wind tunnel. This tunnel will be able to perform a wide range of tests. It will not only be used in an aerodynamic (Aero) test section configuration, but also in an atmospheric boundary layer (ABL) type configuration. It will be able to create a model of the turbulent boundary layer that all structures in the atmosphere are submersed in. The tunnel is designed to utilize both closed return as well as open return tunnel configurations. This will enable the tunnel to reap the benefits of both types of tunnels. Currently most of the ABL studies rely on the assumption that atmospheric velocity variations are adequately modeled by stationary mean and turbulent flow properties. The ISU Aero/ABL tunnel will be able to develop non-stationary flows to help better study and understand this type of phenomena. The primary concern and area of research reported here has been to develop this non-stationary flow device by modeling and testing the design. The results shown reflect that a 107% gust can be achieved by the model, but with some changes to the design, a higher magnitude gust can be achieved.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 380
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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.
Author: Maximillian Hobson-Dupont
Publisher:
ISBN:
Category : Boundary layer (Meteorology)
Languages : en
Pages : 74
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Book Description
There has been much success in atmospheric boundary layer simulation with medium sized closed-circuit wind tunnels with test section dimensions of approximately 1 x 1 m. However, smaller, blower-type wind tunnels are more common in university laboratories due to the lower cost and smaller space requirements. A small size, open flow wind tunnel with a 1 x 1 foot test section was modified to simulate the atmospheric boundary layer with a combination of upstream spires and cubic roughness elements. The primitive spire geometry detailed in the literature was found to yield poor agreement with the power law velocity profile of interest, and a novel iterative algorithm was developed to produce nonlinear spire geometry. The geometry generated by the algorithm was tested in the wind tunnel and found to simulate the desired velocity profile based on a Hellman exponent of 0.20 with a high degree of agreement, having a maximum velocity error of 4%. This confirmed the suitability of small-sized wind tunnels for simulating the atmospheric boundary layer.
Author: University of New Mexico. Technology Application Center
Publisher:
ISBN:
Category : Electric power-plants
Languages : en
Pages : 524
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Book Description
Author:
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 984
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Book Description
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: Adri√°n R. Wittwer
Publisher:
ISBN:
Category : Electronic books
Languages : en
Pages : 0
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Book Description
Experimental studies on wind engineering require the use of different types of physical models of boundary layer flows. Small-scale models obtained in a wind tunnel, for example, attempt to reproduce real atmosphere phenomena like wind loads on structures and pollutant dispersion by the mean flow and turbulent mixing. The quality of the scale model depends on the similarity between the laboratory-generated flow and the atmospheric flow. Different types of neutral atmospheric boundary layer (ABL) including full-depth and part-depth simulations are experimentally evaluated. The Prof. Jacek Gorecki wind tunnel of the UNNE, Argentina, and the Prof. Joaquim Blessmann closed-return wind tunnel of the UFRGS, Brazil, were used to obtain the experimental data. Finally, some recent wind engineering applications of this type of physical wind models are shown.
Author: Environmental Science Information Center. Library and Information Services Division
Publisher:
ISBN:
Category : Earth sciences
Languages : en
Pages : 578
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Book Description
Author: Environmental Science Information Center. Library and Information Services Division
Publisher:
ISBN:
Category :
Languages : en
Pages : 444
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Book Description
