By C. G. Duan, V. Ia Karelin
A scientific exposition of abrasive erosion and corrosion of hydraulic equipment in either conception and engineering perform. all of the vital topics are mentioned together with basics, calculation, research and numerical simulation of liquid-solid movement layout, erosion-resistant fabrics, interplay among cavitation and abrasive erosion, and corrosion of hydraulic equipment.
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Additional info for Abrasive Erosion and Corrosion of Hydraulic Machinery (Series on Hydraulic Machinery)
87%. The increased leakage value brings about a decline in Fundamentals ofHydroabrasive Erosion Theory 31 both the volumetric and hydraulic efficiencies of a turbine. Besides, such leakage causes the reduction of the turbine head and creates fluctuations in its operation. Consequently, the total efficiency falls in the turbine become higher. The effect caused by the erosion of the guide device components as applied to the turbine efficiency, should be considered as most insignificant. As the guide device is being worn, the tailpieces in the blades become thinner and furrows appear on the working faces of the blades in the direction of the water flow line.
Large-sized scaly erosion - A surface entirely covered with deep and enlarged scales 5. In-depth erosion - A surface covered with deep and long channels 6. Through holes or entire erosion-out of the metal. 69 kg/m3 (in June). The mineralogical composition analyses have shown that exceeding 5, in accordance with Moh's scratch hardness number scale, amounts to 41% of the average annual hard matter content. 8-m diameter, with the rated head being 34 to 37 m and maximum capacity of 22 kg/m3. 5 and 5 MW, respectively.
5 A v >c f - \ \ 0 30 o 60 a0 1. hardened steel, with hardness 840 kgf/mm2 2. non-hardened steel, with hardness 128 kgf/mm2 3. 7 Dependence of the erosion rate in specimens of steel and rubber on the solid particle angles of incidence At a < 73° the erosion rate of soft steel rises due to increase of the tangential component in the impact impulse, which results in the material failure effected by shearing. At a < 30° the soft steel erosion rate falls down again, which results from a continuous decrease, taking place in the normal component of the impact strength.