By C. G. Duan, V. Ia Karelin
This e-book offers a scientific exposition of abrasive erosion and corrosion of hydraulic equipment in either thought and engineering perform, and is the 1st accomplished quantity to hide this region intensive.
All the real topics are mentioned together with basics, calculation, research and numerical simulation of liquid–solid move layout, erosion-resistant fabrics, interplay among cavitation and abrasive erosion, and corrosion of hydraulic equipment.
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Additional resources for Abrasive erosion & corrosion of hydraulic machinery
5%, whereas its capacity is increased by 8%. In operational conditions a pure radial undercutting does not occur; the trailing edges rather become distortedly curved due to an increased erosion taking place within the lower rims of the blades. With reference to the thickened trailing edges, it is observed that their configuration is preserved yet their thickened reduces 3 to 4 times due to the abrasive erosion action. 9 b), performed with different trailing edge thicknesses, show the relationship between the thickness reduction of trailing edges and the device efficiency.
The pumping plant is equipped with eight pumps of the 24 Z4 NDN model. This pumping station operates 6 months a year. 6-m diameter were subjected to the erosion. A conventional factory-made pump impeller is worn-out for a period of one to one and a half season of operation, and its blades are the components subjected to the greatest erosion. Visual inspection of the damages emerged on the impeller blade surfaces in the 24 Z4 NDN pump has revealed the following. Traces of deterioration caused by abrasive erosion have shapes resembling large-size grooves with smooth surface.
Moreover, the partial erosion in the latter affects the performance of a pump in a lesser degree. With reference to the combined effect produced on the pump components by both the cavitation process and the solid particles contained in the liquid transferred, it should be noted that to ascertain the exact boundaries of the areas subjected to the cavitational-abrasive erosion is rather difficult in practice, since in operational conditions one of the two erosion patterns is predominate, as a rule, over the other, therefore, the erosion subjected surface possesses distinctive features characteristic of one of them.
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