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This study presents findings on the emergence of a pumping effect within a cylindrical tube closed at the lower end and filled with distilled water upon the introduction of nitrogen gas into it. Gas was introduced into the liquid via a ceramic porous disperser with varying pore diameters, ensuring polydispersity of bubbles. The volumetric flow rate of the supplied gas was 0.0005 m3/s, with a gas volume fraction in the liquid of 4%. The total liquid height in the tube was 1220 mm. Oscillations with different frequencies were applied to the piston. The sound level in the water was measured using a hermetically sealed piezoelectric sensor. Sensor calibration was performed using a sound chamber with a capacitor microphone at frequencies of 250, 500, 750, 1000, and 1500 Hz, chosen based on their proximity to resonance frequencies of the investigated tube. At each investigated frequency, the readings of a thermal anemometer were recorded, and the volumetric airflow rate was determined. It was found that when gas is supplied into a liquid medium through a ceramic porous disperser in the presence of high-pressure acoustic oscillations in the elastic medium, a pumping effect occurs, leading to an increase in the volumetric gas flow rate. At the investigated maximum sound pressure level (SPL) of 125 dB, the increase in gas flow rate was approximately 24%.

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On the Pumping Effect Arising in an Acoustic System of the “Closed-End Tube” Type When Introducing Gas into Liquid

  • 会议论文

  • 发表日期：

    2025年

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  • Grigorii I. Pavlov,
  • Faiz A. Zaripov,
  • Oksana A. Gorbunova

摘要

This study presents findings on the emergence of a pumping effect within a cylindrical tube closed at the lower end and filled with distilled water upon the introduction of nitrogen gas into it. Gas was introduced into the liquid via a ceramic porous disperser with varying pore diameters, ensuring polydispersity of bubbles. The volumetric flow rate of the supplied gas was 0.0005 m3/s, with a gas volume fraction in the liquid of 4%. The total liquid height in the tube was 1220 mm. Oscillations with different frequencies were applied to the piston. The sound level in the water was measured using a hermetically sealed piezoelectric sensor. Sensor calibration was performed using a sound chamber with a capacitor microphone at frequencies of 250, 500, 750, 1000, and 1500 Hz, chosen based on their proximity to resonance frequencies of the investigated tube. At each investigated frequency, the readings of a thermal anemometer were recorded, and the volumetric airflow rate was determined. It was found that when gas is supplied into a liquid medium through a ceramic porous disperser in the presence of high-pressure acoustic oscillations in the elastic medium, a pumping effect occurs, leading to an increase in the volumetric gas flow rate. At the investigated maximum sound pressure level (SPL) of 125 dB, the increase in gas flow rate was approximately 24%.