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<p>The butterfly valve is a crucial control component widely used in fluid transmission systems. Cavitation, a common gas-liquid phase transition, occurs when the local pressure drops below the saturated vapor pressure and is easily induced during valve regulation, reducing flow control accuracy and compromising operational stability. Existing studies on butterfly valve cavitation are primarily conducted at ambient temperatures. However, with the increasing use of high-temperature fluids in engineering, it is essential to investigate cavitation under thermal effects. This study experimentally investigated cavitation flows through a butterfly valve at various fluid temperatures. The evolution of cavitation was visualized, and the cavitation period was identified. Flow characteristics were quantitatively analyzed with respect to temperature-related parameters, including variations in Reynolds number, cavitation number, and thermodynamic factors. As temperature increased, Reynolds numbers rose, indicating a greater likelihood of turbulent flow. Between 30&#xa0;°C and 80&#xa0;°C, cavitation intensity and area increased with temperature. The detached cloud cavitation region expanded correspondingly. Additionally, the dimensionless thermodynamic parameter increased with temperature, confirming a positive correlation between thermal effects and cavitation intensity. These findings enhance the understanding of butterfly valve cavitation under varying thermal conditions and support more accurate flow field predictions.</p>

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Experimental verification of thermal effect on cavitation evolution through a butterfly valve

  • 期刊论文

  • 发表日期：

    2025年9月12日

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  • Guang Zhang,
  • Jia Jun Zhao,
  • Hao Tian Zhang,
  • De Sheng Chen,
  • Zhe Lin

摘要

The butterfly valve is a crucial control component widely used in fluid transmission systems. Cavitation, a common gas-liquid phase transition, occurs when the local pressure drops below the saturated vapor pressure and is easily induced during valve regulation, reducing flow control accuracy and compromising operational stability. Existing studies on butterfly valve cavitation are primarily conducted at ambient temperatures. However, with the increasing use of high-temperature fluids in engineering, it is essential to investigate cavitation under thermal effects. This study experimentally investigated cavitation flows through a butterfly valve at various fluid temperatures. The evolution of cavitation was visualized, and the cavitation period was identified. Flow characteristics were quantitatively analyzed with respect to temperature-related parameters, including variations in Reynolds number, cavitation number, and thermodynamic factors. As temperature increased, Reynolds numbers rose, indicating a greater likelihood of turbulent flow. Between 30 °C and 80 °C, cavitation intensity and area increased with temperature. The detached cloud cavitation region expanded correspondingly. Additionally, the dimensionless thermodynamic parameter increased with temperature, confirming a positive correlation between thermal effects and cavitation intensity. These findings enhance the understanding of butterfly valve cavitation under varying thermal conditions and support more accurate flow field predictions.