6/22/2023 0 Comments Cavitation airflow systems![]() ![]() Reliability of hydraulic systems and also centrifugal pumps is of the highest importance in nuclear engineering. In general, pump failures result in operational changes that reduce efficiency or may result in a breakdown of the pump. This article reviews the major failure modes that are found in centrifugal pumps. Since centrifugal pumps are one of the world’s most widely used type of pump, their operational parameters and also their vulnerabilities are well known. See also: Euler’s Turbomachine Equation – Pump Theory The faster the impeller revolves or the bigger the impeller is, the higher will the velocity head be. The energy transferred to the liquid corresponds to the velocity at the edge of the impeller. Also the diffuser may be fitted with fixed vanes to help guide the flow toward the exit. The output pressure slightly changes according to the design used. The impeller blades are usually backward-curved, but there are also radial and forward-curved blade designs. In the volute the fluid flows through a continuously increasing cross-sectional area, where the kinetic energy is converted into fluid pressure (according the Bernoulli’s principle). Fluid of high kinetic energy is forced out of the impeller area and enters the volute. ![]() ![]() As the fluid’s velocity increases its kinetic energy increases. The fluid accelerates radially outward from the pump chasing and a vacuum is created at the impellers eye that continuously draws more fluid into the pump. As the impeller and blades rotate, they transfer momentum to incoming fluid. In the volute of the pump fluid enters the pump axially through the eye of the impeller ( low pressure area) which rotates at high speed. ![]()
0 Comments
Leave a Reply. |