Title: Study on the length of the recirculation region behind the orifice plate based on numerical simulation
Abstract: The orifice plate,as a kind of energy dissipater with the structure of sudden reduction and sudden enlargement form,has the performance of convenient construction and high energy dissipation ratio.The length of recirculation behind orifice plate has important effects on multi-stage orifice design and orifice's water head loss.By using simulation method in this paper,the effect factors on the length of recirculation flow region were researched,and the conclusions can be obtained that the length of recirculation flow region increased with the decreasing of η(contraction ratio) when Red and a(thickness of orifice plate) not changing,and it decreased with the increasing of a when η and Red not changing.When Red105,Reynolds number has little effects on the length of recirculation,orifice's water head loss coefficient increased with the increasing of recirculation's length.Finally,experience formula about recirculation's length was also put forward in this paper.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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Cited By Count: 4
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