Numerical investigation of interference effects on tall power station chimney subjecting varying wind incident angles

The present investigation aimed to providing a better understanding of the interference effect on Thermal Power Station chimney, India by utilizes CFD simulation with ANSYS-ICM and Fluent to analyse the impact of incident wind providing a reliable method for predicting wind-related effects. The pressure coefficient and wind pressure on windward face of isolated chimney were found to fluctuate within the ranges of 0.842–0.36 and 153.81–66.24 Pa, respectively. Notably, the interference effects led to reduction of approximately 8% maximum pressure coefficient and 9% wind pressure on windward face. The maximum pressure coefficient was observed about 0.77, 0.79, 0.78 and 0.77, and maximum positive pressure observed about 140.61, 145.16, 153.63 and 141.30 Pa on windward face of chimney corresponding to 15⁰ clockwise, 30⁰ clockwise, 15⁰ anticlockwise and 30⁰ anticlockwise wind incident direction at about 0.6 m height of chimney model, respectively. In addition, the suction pressure varied in the range of − 25 to − 62, − 34 to − 77, − 25 to − 57, and − 30 to − 56 on leeward face of interference chimney model corresponding to 15⁰ clockwise, 30⁰ clockwise, 15⁰ anticlockwise and 30⁰ anticlockwise wind incident direction, respectively. The maximum positive and negative pressure coefficient values was observed as 0.79 and -2.09 on the outer surface of chimney corresponding to 30⁰ clockwise wind direction. Whereas, the maximum and minimum value of pressure on windward face of chimney is 153.630 and − 88.8 Pa on the outer surface of chimney corresponding to 15⁰ anticlockwise and 15⁰ clockwise wind incidence direction, respectively.