Title: A new correction method of the blockage on a rectangular antenna based on numerical simulation

Authors: Qiang Du; Fuzhi Wang; Fuyin Du

Addresses: School of Mechanical Engineering, Automation Xihua University, Chengdu, China ' School of Mechanical Engineering, Automation Xihua University, Chengdu, China ' School of Mechanical Engineering, Automation Xihua University, Chengdu, China

Abstract: In this paper, the blockage effects on a rectangular antenna are investigated through numerical simulation, and a correction method for the wind load coefficients is presented. In terms of the separation pressure measured by the wind tunnel test and the law of separation pressure with blockages achieved from the numerical simulation, we derive a relationship for base pressure coefficient of the rectangular antenna with various blockages. Adopting the formula based on the potential flow theory, the drag coefficient without blockage can be obtained. Using the base pressure coefficient to re-normalise the pressure coefficient, the characteristic that the re-normalised pressure coefficient the antenna is independent of the blockage ratio is verified. Furthermore, the pressure distributions on the rectangular antenna without blockage are obtained by the re-normalised pressure coefficient. The corrected results show that the blockage effect on pressure and drag force on the rectangular antenna both are removed effectively.

Keywords: rectangular antenna; blockage effect; numerical simulation; base pressure; correction method; wind load coefficients; separation pressure; drag force.

DOI: 10.1504/IJCSE.2016.077733

International Journal of Computational Science and Engineering, 2016 Vol.13 No.1, pp.56 - 65

Received: 03 Sep 2013
Accepted: 10 Mar 2014
Published online: 14 Jul 2016 *

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