AN EVALUATION OF A TWO-PHASE DAMPING MODEL ON TUBE BUNDLES SUBJECTED TWO-PHASE CROSS FLOW

被引：0

作者：

Sim, W. G. ^{[1
]}

Njuki ^{[1
]}

Mureithi, W. ^{[1
]}

机构：

[1] Hannam Univ, Dept Mech Engn, Taejon, South Korea

来源：

PROCEEDINGS OF THE ASME FLUIDS ENGINEERING DIVISION SUMMER MEETING - 2010 - VOL 3, PTS A AND B | 2010年

关键词：

HYDRODYNAMIC MASS; HEAT-EXCHANGERS; VIBRATION; CYLINDER;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The analytical model (Sim; 2007), to predict the two-phase damping ratio for upward cross-flow through horizontal tube bundles, has been evaluated. The damping model was formulated, based on Feenstra's model (2000) for void fraction and various models (homogeneous, Levy, Martinelli-Nelson and Marchaterre) for two-phase friction multiplier. The analytical results of drag coefficient on a cylinder and two-phase Euler number were compared with the experimental results by Sim-Mureithi (2010). The factor, a relation between frictional pressure drop and the hydraulic drag coefficients, could be determined by considering experimental results. The two-phase damping ratios, given by the analytical model, were compared with existing experimental results. It was found that the model, based on Marchaterre's model, is suitable for air-water mixture while the Martinelli-Nelson's model for steam-water and Freon mixtures. The two-phase damping ratio is independent on pitch mass flux for air-water mixture, but it is more or less influenced by the mass flux for steam-water/Freon(134) mixtures. The two-phase damping ratios, given by the present model, agree well with experimental results for a sufficiently wide range of pitch mass ratio, quality and p/d ratios.

引用

页码：503 / 512

页数：10

共 27 条

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