整体针翅管流动阻力特性实验研究

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Experimental Study of Flow Friction Characteristics of Integral Pin-fin Tubes

1. Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084;
2. Harbin Engineering University, Harbin, 150001

摘要: 对润滑油竖直纵向冲刷下的整体针翅管进行了阻力特性的实验研究。通过分析针翅管的翅高、节距和加工方向对针翅管阻力系数的影响,发现整体针翅管的流动阻力明显高于光管的流动阻力,不同结构参数的针翅管的阻力系数差别较大。在各影响因素中,翅高的影响占主导地位,阻力系数随着翅高的增加而成倍增加。由于三维翅片表面对流动的扰动和破坏,当润滑油的雷诺数达到200～300时,流动阻力曲线将发生转折。
- 整体针翅管 /
- 润滑油 /
- 阻力特性
Abstract: Friction characteristics of integral pin-fin tubes,through which lubricating-oil flowed vertically,were studied experimentally.Effects of the pitch,the height of fins and the machining direction on friction coefficient were analyzed.The experimental results showed that the friction coefficient of the integral pin-fin tube was obviously lager than that of smooth tube.Compared with other influential factors,the effect of the height of fins was dominant.Because the three-dimensional pin fin could disturb and destroy the boundary layer,when the Reynolds Number reached 200~300,the friction coefficient curve began to bend,that was,a turning point was appeared in the friction coefficient curve.
- Integral pin-fin tube /
- Lubricating-oil /
- Friction characteristic