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<p>Increasing attentions have been paid to the noise problem in natural gas stations for production and healthy reasons. In the present work, the aerodynamic noise of the pressure reducing valve JAQ-DN100 used in natural gas stations and its reduction are investigated based on CFD simulations. The source distribution, overall sound pressure level, spectral characteristics and directionality of the aerodynamic noise, as well as the noise reduction capability of perforated plates as the muffler are comprehensively studied. Primary focuses are placed on the impact of the valve opening degree, inlet–outlet pressure drop, as well as the perforated plate structural parameters on the flow field and noise characteristics of the valve. Results indicate that, the aerodynamic noise level initially increases and then decreases with the increase in the opening degree. Under a fixed opening degree, reducing the pressure drop could significantly decrease the noise level (up to 15&#xa0;dB). When the hole spacing-to-size ratio of the perforated plate remains constant, reducing the hole size could result in a decrease in the noise level remarkably (up to 13.9&#xa0;dB). Under a constant hole size of the perforated plate, an increase in the hole spacing-to-size ratio also results in an obvious decrease in the noise level (up to 9&#xa0;dB). A proper perforating ratio must be guaranteed in the design of the perforating plate to assure the normal operation of the valve. The research findings provide meaningful insights into the noise characteristics of pressure reducing valves for natural gas stations and offer references for the structural design of perforated plates to reduce the noise.</p>

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On the aerodynamic noise of a pressure reducing valve for natural gas stations and its reduction by perforated plates

  • 期刊论文

  • 发表日期：

    2025年11月25日

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  • Cong Liu,
  • Youjun Ning,
  • Kang Cen,
  • Changjian Pu,
  • Wenyan Zhang

摘要

Increasing attentions have been paid to the noise problem in natural gas stations for production and healthy reasons. In the present work, the aerodynamic noise of the pressure reducing valve JAQ-DN100 used in natural gas stations and its reduction are investigated based on CFD simulations. The source distribution, overall sound pressure level, spectral characteristics and directionality of the aerodynamic noise, as well as the noise reduction capability of perforated plates as the muffler are comprehensively studied. Primary focuses are placed on the impact of the valve opening degree, inlet–outlet pressure drop, as well as the perforated plate structural parameters on the flow field and noise characteristics of the valve. Results indicate that, the aerodynamic noise level initially increases and then decreases with the increase in the opening degree. Under a fixed opening degree, reducing the pressure drop could significantly decrease the noise level (up to 15 dB). When the hole spacing-to-size ratio of the perforated plate remains constant, reducing the hole size could result in a decrease in the noise level remarkably (up to 13.9 dB). Under a constant hole size of the perforated plate, an increase in the hole spacing-to-size ratio also results in an obvious decrease in the noise level (up to 9 dB). A proper perforating ratio must be guaranteed in the design of the perforating plate to assure the normal operation of the valve. The research findings provide meaningful insights into the noise characteristics of pressure reducing valves for natural gas stations and offer references for the structural design of perforated plates to reduce the noise.