微小な脈動を利用した質量流量計

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タイトル別名
  • Mass Flowmeter Utilizing Small Pulsation
  • ビショウ ナ ミャクドウ オ リヨウシタ シツリョウ リュウリョウケイ

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A new method for measuring the mass flow rate through a pipe is described. A pulsating source of known strength is placed in the flow. This source produces an axial flow pulsation superimposed on the otherwise steady flow. And the flow pulsation causes an alternating pressure as a direct result. The pressure difference across the source is picked up by a manometer of high sensitivity. A phasesensitive detector being employed, the output of the manometer is converted to a DC voltage which is proportional to the mass flow rate. An experimental device which employed condenser microphones for picking up the pressure difference has been built on a trial basis. Several measurements were performed for air flow. The mass flow rates measured with this device were in good agreement with the ones which were determined from flow velocity and density measurement. A mass flowmeter based on this method is simple and compact in construction, and has an obstructionless configuration and a minimal pressure drop.

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