窄缝环形通道内流动阻力特性的实验研究

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Experimental Investigation on the Single-Phase Flow Friction in Narrow Annulus

1. School of Mechanical Engineering, Shanghai Jiao Tong University, 200030, China;
2. College of Power and Nuclear Engineering, Harbin Engineering University, 150001, China

摘要: 分别在换热和冷态条件下,对水平、竖直向上和竖直向下3个流动方向的窄缝环形通道进行了流动摩擦阻力实验研究。实验发现窄缝通道内流态转变点比普通流道有所提前。将实验结果与传统的阻力计算公式进行对比,分析了换热温差及流动方向对摩擦阻力的影响,对窄缝环形通道内阻力特性进行了探讨。
- 窄缝环形通道 /
- 阻力特性 /
- 流动方向 /
- 换热
Abstract: Experiments are carried out to investigate the flow friction characteristics with/without heat exchange in narrow annulus. The experiments involve three flow directions, which are horizontal flow, upward flow and downward flow. The transition from laminar to turbulent flow in annulus is initiated earlier than that in normal circular tubes. The friction factors of narrow annulus are compared with the conventional correlations, and the influences of the temperature difference and the flow directions are analyzed.
- Narrow annulus /
- Flow friction /
- Flow direction /
- Heat exchange