Browsing by Author "Govinda Ram, H.S."

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The wind tunnel experiments were conducted on a series of two-dimensional isosceles triangular cylinders of 28 mm base height and different vertex angles (2? = 30°, 60° and 90°), to study the distribution of unsteady static pressures in the wake region and to ascertain if they could be correlated. The velocity ranged from 5 to 15 m/s in the present study. The study reveals that the maximum coefficient of fluctuating pressures in the wake bears a constant ratio with base pressure coefficients for the models studied, and it is found to be 0.40. © 2005 Taylor & Francis Group, LLC.
(Wake pressure flow field characteristics associated with two dimensional triangular prisms) Yaragal, S.C.; Govinda Ram, H.S.
2005
Wind 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.
(Experimental investigation of the 2-D flow field associated with bleed flows) Yaragal, S.C.; Govinda Ram, H.S.; Tamura, Y.
2005