www.tjprc.org SCOPUS Indexed Journal editor@tjprc.org DESIGN OF CENTRIFUGAL PUMP IMPELLER AND ITS EFFECTS ON CAVITATION CH. SAI TEJA 1 & Dr. M. MURALI KRISHNA 2 1 Student, Department of Aeronautical Engineering, Aerospace, Mallareddy College of Engineering and Technology, Telangana, India 2 Professor, Department of Aeronautical Engineering, Mallareddy College of Engineering and Technology, Telangana, India ABSTRACT A centrifugal pump’s function is to transport fluid from one system to another system, within minimum time. Impeller is a key component in centrifugal pump, it intakes fluid through hub of impeller axially and distributes the fluid, radially. The configuration of the impeller blades directly effects the performance. The current paper investigates the characteristics of the pump by altering the blade profile and exit blade angles. A destructive phenomenon of cavitation is greatly influenced by blade profile. Generally, the blades of impeller will have a steep fall from hub to tip or remain in same height from hub to tip. The present project investigates the performance by employing a volute rim connecting all highest points of the blade tips. The blades also rise from tub to tip allowing the fluid to have enough space to accumulate large volumes of fluid with minimal impact on the blades to hub. Any alteration in the geometry, blade profile has a significant influence on the performance of the pump. Npsh denotes the net pressure suction head that is the amount of energy at the pump suction available to exert pressure on the fluid, if the pressure required at the pump inlet to make the liquids flow through suction side without cavitation. This can greatly reduce the cavitation effects, helping the pump to sustain to the calculated service life. Simulation is carried out using ANSYS R 15 software in FLUENT module, with ICEM meshing and SST k-Ω turbulence model. KEYWORDS: Impeller, Cavitation & Simulation Received: May 06, 2019; Accepted: Jun 17, 2019; Published: Jul 10, 2019; Paper Id.: IJMPERDAUG201975 INTRODUCTION The Fluid entering a centrifugal pump travels towards the low pressure area that is the impeller eye. Impeller and blades rotate and transfer the momentum to increasing fluid. Fluid of high kinetic energy is forced out of the impeller areas and it enters the casing. The centrifugal pumps draws fluid through the hub axially and transfers the fluid radially, it is driven by a shaft mechanically connected to a motor. It generally can handle large volumes of liquids with a high mass flow rates. Centrifugal pumps can be employed for sewage drainage system, petro chemical industry mining, assisting in fire protection, supplying large volumes of fluid, pumping crude oil, irrigation, pumping the water and other domestic purposes. Centrifugal pump faces the practical problems such as cavitation, which will have detrimental effects such as erosion of the blades which further gives rise to additional problems such as vibrations, ultimately leading to reduction in service life than estimated. Other effects include loss in efficiency and performance of the centrifugal pump. If the absolute static pressure is above the vapor pressure of the liquid in the pump, it is net pressure suction head available and is a function of the system in the pump in which it operates. It is the excess pressure of the fluid over its vapor pressure, as it arrives at the pump Original Article International Journal of Mechanical and Production Engineering Research and Development IJMPERD) ISSN (P): 2249-6890; ISSN (E): 2249-8001 Vol. 9, Issue 4, Aug 2019, 753-760 © TJPRC Pvt. Ltd.