Analysis of Effect Change of Side Entry Nozzle Angle on Friction Coefficient of Fluid Flow in Pipes

The use of nozzles in the pipeline flow is used to determine the type of pipes that are good for the industry. This study aims to analyze the effect of changes in the inlet side nozzle angle to the friction coefficient of the fluid flow in the pipe with the nozzle angle of 250, 350, and 450. The experiment uses experimental method using nose-angle variation on the coefficient of friction experimentally and theoretically with rotation variation And the opening of the fluid flow valve in the pipe. The result of the research is at the angle of 25 0 nos of opening of 100 % valve of 125 rpm rotation coefficient value (feks) = 0, 00228, theoretical friction coefficient (fb) = 0, 00465, velocity distribution (U / U *) = 24, 7737, the average velocity () = 14.925 m / s, at an angle of 350, the 100 % opening valve 125 rpm coefficient of friction (0.00) is 0.00177, theoretical friction coefficient (fb) = 0.0045, The speed velocity () = 16.970 m / s, whereas at the 450 angle, the coefficient of friction value is 0.00113, the theoretical friction coefficient (fb) = 0, 00436, velocity distribution (U / U *) = 24.3594, average velocity () = 19.353 m / s. The results show that the mean velocity relation to the coefficient of friction experimentally and theoretically is inversely proportional, whereas the coefficient of friction coefficient experimentally and theoretically to the velocity distribution is straight and the coefficient of friction is theoretically tends to be higher than the coefficient of friction in experiment.