Study on Corrosion Resistant Materials for Centrifugal Pump Impeller | Chapter 05 | Research Developments in Science and Technology Vol. 5

 An impeller is a rotating component that increases or decreases fluid flow and pressure and is used in a variety of sectors including aeroplanes, automobiles, medicine, and power plants. Bronze and hardened steel impellers quickly decay when exposed to harmful media such as waste water, saltwater, sewage, chlorine, bromine, and a range of chemicals in real-time applications. They rely on cavitation and electrolysis (galvanic erosion) to ruin the impeller quickly. Impeller corrosion is a major problem, driving increasing pump operating and maintenance costs and causing the industry to explore for alternative materials. The main goal of this project is to find the optimum corrosion-resistant material for the impeller. Caprolone (Nylon) and ABS (Acrylonitrile Butadiene Styrene) are examples of such materials. Consider traditional materials like stainless steel and bronze for the research. The ABS material fared well in terms of corrosion resistance, since it possesses chemical, thermal, toughness, and strength, according to the simulation findings.

Author(S) Details

R. Navaneetha
Mechanical Department, Chaitanya Bharathi Institute of Technology, India.

Ch. Indira Priyadarsini
Mechanical Department, Chaitanya Bharathi Institute of Technology, India.

T. Ratna Reddy
Mechanical Department, Chaitanya Bharathi Institute of Technology, India.

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The Method of Characteristics Applied to the Sensitivity Analysis for Water Hammer Problems| Chapter 5 | New Approaches in Engineering Research Vol. 9

 Water hammer is a transitory condition caused by an abrupt change in velocity in pipe flows. This phenomena can cause significant pressure variations in pipes, posing a risk to pipelines. Water hammer is typically caused by rapidly closing valves and abruptly turning off or starting pumps. In pressurised pipelines, it is one of the most damaging hydrodynamic effects. The governing equations of the water hammer phenomena are numerically solved using MATLAB in this study, and then a sensitivity analysis is carried out by adjusting factors including pipe roughness, reservoir head, pipe diameter, pipe length, and wave velocity. The numerical answer is based on the following formula:technique of determining qualities (MOC). The results reveal that as pipe roughness increases, pressure fluctuations decrease. Furthermore, as the reservoir water level rises, the pipe experiences intense negative and positive pressures. The pipe's terminal portion is a vital zone for design since maximum and minimum pressures occur there. The pressure variations would be reduced by increasing the pipe diameter. By adopting shorter pipe lengths, the pressure fluctuation range can be greatly reduced. The pressure fluctuation range reduces as wave velocity increases.

Author (S) Details

Dr.Farzin Salmasi
Department of Water Engineering, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.


Dr. John Abraham
University of St. Thomas, Minnesota, School of Engineering 2115 Summit Avenue St. Paul, Minnesota 55105, USA.


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