11-11-2014, 12:07 PM
Abstracts: Centrifugal pumps are used for transportation of solids and liquid over short to medium distance through the pipelines. As the fluid enters into through the suction nozzle of the pump to the eye of impeller, the fluid is trapped between the blades of the impeller, due to the centrifugal force the fluid tends to move towards the blades and finally towards the outside diameter of impeller, where fluid undergoes a rapid increase in velocity. The liquid that leaves the outer diameter of impeller immediately slams into the wall of casing, where the velocity energy is converted into pressure energy. The centrifugal pump designed to handle the liquids is normally single stage, end suction having radial or mixed flow configuration blades. In the present work, the conventional design of centrifugal pump has been done using empirical equations for handling clear liquids and can be modified according to the applications. Due, to the complex flow inside the centrifugal pump the application of computational fluid dynamics (CFD) is increasing in the design of centrifugal pump. From, the design of centrifugal pump the 3-D model of the closed impeller has been generated using Creo 2.0, and then for the analysis ANSYS 13.0 Workbench Fluid Flow (CFX) was used by applying boundary conditions. The analysis is done of the existing impeller along with the four modified impeller by changing its vane angles at various flow rates and then from the results obtained the efficiency of all the modified impeller is compared with the existing impeller and selecting the optimized vane angle combination for maximum Efficiency.