Preliminary Development of an Atmospheric Boundary Layer Wind Tunnel PDF Download
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Author: Kuanmin Kimjuan
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 109
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Book Description
Author: Kuanmin Kimjuan
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 109
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Book Description
Author: Ging Sheng Yap
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 104
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Author: Fredric A. Godshall
Publisher:
ISBN:
Category : Boundary layer (Meteorology)
Languages : en
Pages : 214
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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: Arnold Martin Kuethe
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 52
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Author: Jack E. Cermak
Publisher:
ISBN:
Category : Wind tunnels
Languages : en
Pages : 25
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Book Description
Presents the evolution of physical-modeling techniques to simulate wind and wind effects. Characteristics of atmospheric boundary layers (ABLs) are reviewed and features that require modeling for wind-engineering applications are defined. Similarity criteria are presented for "exact" similarity and necessary approximations are discussed. Special features of wind tunnels needed to achieve the modeling requirements are identified. Comparisons are made of data measured in the field and in a boundary-layer wind tunnel. Wind tunnels with special capabilities for modeling the ABL are described.
Author: John J. Nunemaker
Publisher:
ISBN:
Category : Wind tunnels
Languages : en
Pages : 150
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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: Alan E. Morgan
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: W. F. Cope
Publisher:
ISBN:
Category :
Languages : en
Pages :
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