Download Abrasive erosion & corrosion of hydraulic machinery by C. G. Duan, V. Ia Karelin PDF

By C. G. Duan, V. Ia Karelin

This publication offers a scientific exposition of abrasive erosion and corrosion of hydraulic equipment in either conception and engineering perform, and is the 1st complete quantity to hide this quarter extensive.

All the $64000 topics are mentioned together with basics, calculation, research and numerical simulation of liquid–solid circulate layout, erosion-resistant fabrics, interplay among cavitation and abrasive erosion, and corrosion of hydraulic equipment.

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Extra resources for Abrasive erosion & corrosion of hydraulic machinery

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2 MW each. The runner and other elements of the turbine are made of cast carbon steel. The periodic full-scale surveys carried out during the scheduled maintenance overhauls of the components of the hydraulic sets have revealed that these elements have acquired, in the course of about 10 months of operation, abrasion of the kind described below. The spiral case in one of the hydroelectric units, made by welding from sheet steel, has fine-scaly erosion throughout the entire surface, which is increased at the approach to the turbine stator.

In addition to the damage of impellers the motionless components in the hydraulic machines were deteriorated as well. An illustrative example of this is found in the surface failure, which took place in the impeller case of a large propeller-type pump. The case under review, fabricated from case iron, is designed to include two Fundamentals ofHydroabrasive Erosion Theory 35 compartments (the lower and upper ones). The metal deterioration pattern formed a strip of 29 ~ 25 mm in size and 2 - 3 mm in depth.

The entire working surface areas in these blades are covered with grooves and cuts of the indicated shape. This results, probably, from mutual action of cavitation being formed by the surface unevenness and suspended matter present in the area of the pulsation cavity. The joint effort exerted by both the sediment matter and cavitation resulted in deterioration of entire blade areas. At the completion of one year of operation, in the water including suspended sediment particles, there are cases of complete absence of edges in the pump blades within the area reaching up to 5 cm in width.

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