Scholarlink

Abstract <p>The results of eddy-resolving ILES simulation of turbulent mixed convection in a rapidly rotating annular cavity with a central shaft under the conditions of the well-known experiment (Bohn, 2000) are given. The cavity is heated from the disk surfaces and from the periphery, while the cooling air flows through a narrow annular channel along the shaft. The use of a relatively fine computational grid (approximately 9 million hexahedral cells concentrating toward the walls) ensured acceptable resolution of thin quasi-laminar Ekman layers and small-scale eddies, that play an important role in the heat transfer processes near the disks. A particular attention is given to the formation of realistic flow conditions at the cavity inlet (including the presence of turbulent content), taking into account the characteristics of the cooling air supply duct of the experimental facility. The proposed modification of the boundary conditions led to a dramatic improvement in the quality of heat transfer calculations in the near-axial region of the disk as compared to calculations without turbulent content at the cavity inlet.</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

Eddy-Resolving Numerical Simulation of Mixed Convection in a Rotating Annular Heated Cavity with Axial Throughflow

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月25日

查看全文
  • D. K. Zaitsev,
  • A. M. Levchenya,
  • E. M. Smirnov

摘要

Abstract

The results of eddy-resolving ILES simulation of turbulent mixed convection in a rapidly rotating annular cavity with a central shaft under the conditions of the well-known experiment (Bohn, 2000) are given. The cavity is heated from the disk surfaces and from the periphery, while the cooling air flows through a narrow annular channel along the shaft. The use of a relatively fine computational grid (approximately 9 million hexahedral cells concentrating toward the walls) ensured acceptable resolution of thin quasi-laminar Ekman layers and small-scale eddies, that play an important role in the heat transfer processes near the disks. A particular attention is given to the formation of realistic flow conditions at the cavity inlet (including the presence of turbulent content), taking into account the characteristics of the cooling air supply duct of the experimental facility. The proposed modification of the boundary conditions led to a dramatic improvement in the quality of heat transfer calculations in the near-axial region of the disk as compared to calculations without turbulent content at the cavity inlet.