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Orifice plate, with the characteristics of high energy dissipation capacity and convenient construction, has a
broad application prospects in China. It is revealed by the means of simulation in this paper that, under the condition of
the same contraction ratio and thickness, sharp-edged orifice plate has the highest energy dissipation capacity and squareedged
orifice plate has minimum energy dissipation ability among sharp-edged orifice plate, square-edged orifice plate
and round-corner orifice plate. However, their capacities of resistance cavitations damage are vice versa. It is important to
apply the most suitable shape orifice plate in practical engineering.