Publication

Mechanism of the Efficiency Drop due to traveling Bubble Cavitation

François Avellan
1994
Conference Papers

Abstract

The setting level of a hydraulic machine, specially for low head machines, is decided with respect to the possible alteration of the efficiency due to the cavity development. In the case of traveling bubble cavitation, corresponding to the outlet cavitation at the nominal head, the physical phenomenon underlying such an efficiency alteration is not very clear, even though a strong dependence of this drop with the volume of cavities have been noticed. The aim of this paper is to present the results of an experiment intending to explain physically the influence of bubble cavitation on the performance of a hydraulic profile.

Official source

https://infoscience.epfl.ch/entities/publication/ad519359-3ce4-47f3-8475-7f4b8123541f

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François Avellan
1994
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/ad519359-3ce4-47f3-8475-7f4b8123541f

About this result

Related concepts (31)

Hydraulic machinery

Hydraulic machines use liquid fluid power to perform work. Heavy construction vehicles are a common example. In this type of machine, hydraulic fluid is pumped to various hydraulic motors and hydraulic cylinders throughout the machine and becomes pressurized according to the resistance present. The fluid is controlled directly or automatically by control valves and distributed through hoses, tubes, or pipes.

Hydraulic cylinder

A hydraulic cylinder (also called a linear hydraulic motor) is a mechanical actuator that is used to give a unidirectional force through a unidirectional stroke. It has many applications, notably in construction equipment (engineering vehicles), manufacturing machinery, elevators, and civil engineering. A hydraulic cylinder is a hydraulic actuator that provides linear motion when hydraulic energy is converted into mechanical movement. It can be likened to a muscle in that, when the hydraulic system of a machine is activated, the cylinder is responsible for providing the motion.

Hydraulic fluid

A hydraulic fluid or hydraulic liquid is the medium by which power is transferred in hydraulic machinery. Common hydraulic fluids are based on mineral oil or water. Examples of equipment that might use hydraulic fluids are excavators and backhoes, hydraulic brakes, power steering systems, automatic transmissions, garbage trucks, aircraft flight control systems, lifts, and industrial machinery. Hydraulic systems like the ones mentioned above will work most efficiently if the hydraulic fluid used has zero compressibility.

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Mechanism of the Efficiency Drop due to traveling Bubble Cavitation

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