Yaragal, S.C.Govinda, Ram, H.S.Tamura, Y.2020-03-312020-03-312005Journal of the Institution of Engineers (India): Civil Engineering Division, 2005, Vol.86, NOV., pp.109-112https://idr.nitk.ac.in/handle/123456789/11166Wind tunnel experiments were conducted on a series of two-dimensional perforated plates normal to an air stream to study the characteristics of unsteady wake pressures and to ascertain the parameters amongst which a certain level of correlation can be established. The velocity ranged from 5 m/s to 15 m/s in the present study. The pressure field gets significantly modified as the perforation level increases. The present study is concerned with three plates with perforation level of 0%, 25% and 35%. There appears to be a correlation between the maximum normalized value of the RMS pressure fluctuation levels, base pressure and the perforation level of the normal plate.Article