Scholarlink

<p>Cavitation in butterfly valves degrades hydraulic performance and accelerates vibration and erosion. This study introduces a wedge-modified disc and evaluates how wedge angle (<i>α</i> = 5°, 10°, 15°, 20°, 25°) alters cavitation inception and evolution relative to a prototype. Transient large-eddy simulations using the Schnerr–Sauer model were performed for water–vapor flow, with validated near-wall resolution, grid/time-step independence. Angle-resolved diagnostics—including Q-criterion isosurfaces, and vortex-cavitation interaction—reveal that the wedge regularizes the pre-axial shear layer, breaks large vapor sheets into smaller structures, elevates local pressure, and shortens vapor residence. The <i>α</i> = 15° configuration provides the strongest shear-layer stabilization and the smallest vapor region, whereas larger angles (20°–25°) promote extended downstream coherent structures. These results establish a cavitation-suppression analysis associated with the wedge angle and identify <i>α</i> = 15° as the wedge angle that provides the most effective cavitation suppression for the butterfly valve.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of wedge angle on cavitation evolution and inhibition in a butterfly valve

  • 期刊论文

  • 发表日期：

    2026年5月11日

查看全文
  • Guang Zhang,
  • Shu Qin Qi,
  • Xuan Wu,
  • Xiao Zhong Zhang,
  • Sheng Jian Xia,
  • Zu Chao Zhu,
  • Zhe Lin

摘要

Cavitation in butterfly valves degrades hydraulic performance and accelerates vibration and erosion. This study introduces a wedge-modified disc and evaluates how wedge angle (α = 5°, 10°, 15°, 20°, 25°) alters cavitation inception and evolution relative to a prototype. Transient large-eddy simulations using the Schnerr–Sauer model were performed for water–vapor flow, with validated near-wall resolution, grid/time-step independence. Angle-resolved diagnostics—including Q-criterion isosurfaces, and vortex-cavitation interaction—reveal that the wedge regularizes the pre-axial shear layer, breaks large vapor sheets into smaller structures, elevates local pressure, and shortens vapor residence. The α = 15° configuration provides the strongest shear-layer stabilization and the smallest vapor region, whereas larger angles (20°–25°) promote extended downstream coherent structures. These results establish a cavitation-suppression analysis associated with the wedge angle and identify α = 15° as the wedge angle that provides the most effective cavitation suppression for the butterfly valve.