Aerodynamic forces on a high-voltage delta-configuration lattice transmission tower segment

Show simple item record Oza, Parthesh S. Kumar, Manish Mohapatra, Pranab K.
dc.coverage.spatial United States of America 2012-09-26T07:22:31Z 2012-09-26T07:22:31Z 2021-09
dc.identifier.citation Oza, Parthesh S.; Kumar, Manish and Mohapatra, Pranab K., "Aerodynamic forces on a high-voltage delta-configuration lattice transmission tower segment", Journal of Wind Engineering and Industrial Aerodynamics, DOI: 10.1016/j.jweia.2021.104711, vol. 216, Sep. 2021. en_US
dc.identifier.issn 0167-6105
dc.description.abstract This paper presents a study on aerodynamic properties of the upper segment of a high-voltage delta-configuration (cat-head) lattice transmission tower. These segments have been damaged in recent strong-wind events. A representative 1:100 scale specimen of the segment was subjected to wind tunnel tests. A computational fluid dynamics-based model was developed to simulate experimental observations. These models were extended to consider segments with different properties, and force coefficients in transverse and longitudinal directions were calculated. Further, provisions outlined in five design standards were used to estimate force coefficients for these segments. Wind forces for a segment can be determined by multiplying that computed using ASCE 74 or IEC 60826 by a factor, which is a function of yaw angle and solidity ratio. This factor varies between 1.0 and 1.6 (1.0 and 2.0) for the transverse (longitudinal) direction. Additional analyses revealed that an approximately 100% increase in the gap between adjacent longitudinal faces leads to an approximately 10% increase in the force coefficient, and that the influence of Reynolds number and turbulence parameters is small. Further, introduction of cross-arm led to a less than 10% reduction in the force coefficient for transverse direction; the influence was negligible in the longitudinal direction.
dc.description.statementofresponsibility by Parthesh S. Oza, Manish Kumar, Pranab K.Mohapatra
dc.format.extent vol. 216
dc.language.iso en_US en_US
dc.publisher Elsevier en_US
dc.subject Lattice transmission tower en_US
dc.subject Cat-head tower en_US
dc.subject Delta configuration en_US
dc.subject Wind tunnel tests en_US
dc.subject Force coefficients en_US
dc.subject Computational fluid dynamics en_US
dc.subject Design standards en_US
dc.title Aerodynamic forces on a high-voltage delta-configuration lattice transmission tower segment en_US
dc.type Article en_US
dc.relation.journal Journal of Wind Engineering and Industrial Aerodynamics

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