分流二差圧式質量流量計

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タイトル別名
  • Two Differential Pressures Type Parallel Mass Flowmeter
  • ブンリュウ ニサアツシキ シツリョウ リュウリョウケイ

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A two differential pressures type parallel mass flowmeter is composed of compound pipes in parallel with two branch pipe lines, a constant flow apparatus and two differential manometers. Both of the branch pipe lines have two straight portions.<br>The liquid to be measured flows in the pipe line and then is divided into two branches without control. A flow of constant volume flow rate is sent from a position between two straight portions of one branch pipe line to the corresponding position of the other. The differences of pressures at the straight portions of both branch pipe lines, are measured by the differential manometers.<br>Applying Bernoulli's theorem to the stream lines through both branch pipe lines, it is concluded that the difference of the two differential pressures is proportional to the mass flow rate. The error due to viscosity may be corrected by introduction of a discharge coefficient.<br>The results of experiments with two trial mass flowmeters show that the mass flow rate can be obtained by a parallel mass flowmeter of two differential pressures type with a constant discharge coefficient.

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