RESEARCH OF HEAT TRANSFER FROM A ROTATING CYLINDER WITH AND WITHOUT CROSS FLOW AT THE LOW REYNOLDS NUMBER

低雷诺数下有横流和无横流的旋转圆筒传热研究

• 批准号: 04805021
• 负责人: SHIMADA Ryohachi
• 金额: $ 1.09万
• 依托单位: ISHINOMAKI SENSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04805021/
• 关键词: Comvective Heat Transfer; Rotating Cylinder; Mixed Convection; 粗面; 自然対流; 強制対流

The local and average coefficients of heat transfer from a rotating cylinder in a uniform flow were measured by Mach-Zehnder interferometer with visual observation of flow patterns. The experiments covered the range of rotating and cross-flow Teynolds numberes from 0 to 3000. The experimental study were concerned with heat transfer where the cross flow, rotation flow, and the free-convection flow were mixed. The following results were obtained. (1) At a cross-flow Reynolds number above 1000, the heat transfer was not influenced by free convection. (2) When the cross-flow Reynolds number was above 1000 and above the rotating reynolds number, the average Nusselt number agreed with the value for the static cylinder in forced comvection. (3) At a rotating Reynolds number Re _r more than twice the cross-flow Reynolds number Re _d, the average Nusselt number agreed with the equation, Nu M =0.055Re _r^<0.7>(1+8Gr_d/Re_r^2)^<0.35>. (4) At Re_d under 1000, the heat transfer was the poorest when Re _r was wtice that of Re _d.

通过马赫-曾德尔干涉仪并目视观察流型，测量均匀流中旋转圆柱体的局部和平均传热系数。实验涵盖了从0到3000的旋转流和横流泰诺数范围。实验研究涉及横流、旋转流和自由对流混合的传热。得到以下结果。 (1) 当横流雷诺数大于1000时，传热不受自由对流的影响。 (2)当横流雷诺数大于1000且大于旋转雷诺数时，平均努塞尔数与强制对流静态圆柱的值一致。 (3) 当旋转雷诺数Re _r 大于横流雷诺数Re _d 的两倍时，平均努塞尔数符合方程Nu M =0.055Re _r^<0.7>(1+8Gr_d/Re_r^2)^<0.35>。 (4)在Re_d小于1000时，当Re_r大于Re_d时传热最差。

项目成果

Ryohachi Shimada: "Heat Transfer from a Rotating Cylinder with and without a Cross flow" Heat Transfer Japanese Research. 21. 109-122 (1992)

Ryohachi Shimada：“具有和不具有横流的旋转圆筒的传热”传热日本研究。

RYOHACHI SHIMADA: "Heat Transfer from a Rotating Cylinder with and without a Crossflow" Heat Transfer Japanese Research. Vol.21, No.2. 109-122 (1993)

RYOHACHI SHIMADA：“带有和不带有横流的旋转圆筒的传热”传热日本研究。

RYOHACHI SHIMADA: "Heat Transfer from a Rotating Cylinder in a Uniform Flow" Trans. of the Japan Society of Mechanical Engineers. Vol.57 No.533. 210-216 (1991)

RYOHACHI SHIMADA：“均匀流动中旋转圆筒的传热”Trans。

島田了八: "一様流中におかれた回転円柱の熱伝達" 日本機械学会論文集. 57. 210-216 (1991)

Ryohachi Shimada：“均匀流动的旋转圆柱体中的传热”，日本机械工程师学会汇刊 57. 210-216 (1991)。

Ryohachi Shimada: "Heat Transfer from a Rotating Cylinder with and without a Crossflow." Heat Transfer Japanese Research. 21. 109-122 (1992)

Ryohachi Shimada：“有和没有横流的旋转圆筒的传热。”