差圧式気体流量計の圧力ゆらぎと脈動誤差
書誌事項
- タイトル別名
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- Steady Flow Pressure Fluctuations and Unsteady Flow Pulsation Error of Differential Pressure Gas Flow Meters
説明
It is well known from experience that a differential pressure across an orifice and a static pressure at a tap show random pressure fluctuations when using a differential-pressure type gas flow meter for metering steady flow. The characteristics of such pressure fluctuations are experimentally investigated and analyzed by correlation techniques.<br>The differential and static pressure fluctuations propagate from a pressure source such as a blower or a suction tank to the far pipe end and are independent of the direction of the gas flow. The propagation speed is equal to the sound speed in the pipe line, which is calculated from the space-time correlation. The pressure fluctuations have no correlation to the flow-rate fluctuations measured with a hot-wire anemometer at the same detecting point. These static and differential pressure fluctuations have the characteristics of low-frequency adiabatic pressure waves, and therefore the Bernoulli theorem does not apply to them. From the same point of view, it becomes clear that pulsating pressures have the same characteristics.<br>To summarize, steady flow pressure fluctuations and unsteady flow pressure pulsations do not have direct relations to the flow-rate fluctuations and pulsations through a constriction such as an orifice plate, a nozzle, or a Venturi tube in a pipe line.
収録刊行物
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- 計測と制御
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計測と制御 13 (6), 475-489, 1974
公益社団法人 計測自動制御学会
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詳細情報 詳細情報について
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- CRID
- 1390282681494266496
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- NII論文ID
- 130003694323
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- ISSN
- 18838170
- 04534662
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
