Performance of conical jet nozzles in terms of discharge coefficient

An attempt is made to obtain a simple, explicit and analytical expression for the discharge coefficient of conical convergent nozzles operating under varying pressure ratios. The theoretical results based on this approach have been compared with discharge coefficient of conical jet nozzles determined experimentally covering a range of pressure ratio up to 3.25. The theory predicts the correct13; trend of the variation of discharge coefficient with respect to nozzle pressure ratio and nozzle convergence angle. Satisfactory quantitative agreement with the experimental results is possible by applying suitable correction factor for the boundary layer growth which is dependent on Reynolds number.13; The effect of variation of semi-convergence angle, the effect of lip-rounding and the effect of stepped convergence on the discharge coefficient have also been investigated experimentally