© 2018 Copyright held by the author(s). Published by AIJR Publisher in Proceedings of First Conference for Engineering Sciences and Technology (CEST-2018), September 25-27, 2018, vol. 2. This is an open access article under Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license, which permits any non-commercial use, distribution, adaptation, and reproduction in any medium, as long as the original work is properly cited. ISBN: 978-81-936820-6-7 Effects of Different Fluids Properties on Cavitation Performance in Centrifugal Pump Saad Ghidhan 1* , Moamar Hamed 1 , Mansor Benaros 2 1 Mechanical and Industrial Engineering Department, College of Engineering, Elmergib University, Libya 2 Mechanical and Industrial Engineering Department, Alasmarya University, Libya DOI: https://doi.org/10.21467/proceedings.4.9 * Corresponding author email: saadgedan@yahoo.com ABSTRACT Cavitation, which is the formation and collapse of vaporous cavities in flowing liquids, can degrade the performance of pumps and other hydraulic equipment. The aims of the present research are to investigate the effect of different fluids properties on pump cavitation performance. Consideration is given to examine the effect of liquid viscosity and density on cavitation behavior. Experimental results are presented for a centrifugal pump operating in water, kerosene and diesel fuel with different disposal rates of flow. With references to the results, the water has affected by the cavitation at less Net Positive Suction Head (NPSH) than other liquids, also it can be conducted that the kerosene shares the closest cavitation behavior with diesel fuel. Therefore, the stress produced by cavitation bubbles decreases with increase of viscosity of the liquid. Keywords: Water, kerosene, diesel fuel, cavitation performance, centrifugal pump, Net Positive Suction Head (NPSH( 1 Introduction When a centrifugal pump handles liquids with different viscosity and specifications, there Net Positive Suction Head (NPSH) normally will be different. The simple definition of the NPSHA is the difference between pressure at the suction of the pump and the vapour pressure for the liquid being pumped [1]. An increase or decrease of NPSH will result in cavitation taking place in the pump. In result, the pump will be subject to abnormal operations, such as loud noise, violent vibration, performance degradation, impeller or other components damage. In fact, measuring or predicting NPSH of a centrifugal pump at various operating conditions is quite important for the hydraulic design optimization and engineering application when the pump handles different viscous liquids and it’s important to know the situation of operating with this phenomena and how to avoid the problem of cavitation [2]. In almost of petroleum industries and chemical operations pumps will deal with liquids which have such different specifications, there are two sorts of liquid products, which need to be transported by centrifugal pumps. One kind of liquid is with a higher vapour pressure but with