颗粒堆积床内两相流动阻力及相间摩擦力

摘要/Abstract

摘要：

为了探究颗粒堆积多孔介质通道内两相流动阻力特性，使用不同尺寸的球形颗粒构建实验床，在碎片床冷却性实验装置(DEBECO)上进行了气水两相流动实验.基于实验数据，对比验证了多孔介质内两相流动阻力压降预测模型，重点分析了颗粒床内气液两相相间摩擦力对阻力压降的影响.结果表明：对小尺寸(如d=1.5 mm)颗粒堆积床，气液两相相间摩擦力对其两相流动阻力压降影响微弱，两相流动阻力压降随气速增大呈逐渐上升的趋势；对大尺寸(如d=6 mm)颗粒堆积床，在低速下气液两相相间摩擦力对阻力压降影响显著，随气速增大，其阻力压降出现先下降后上升的趋势.

关键词: 多孔介质, 两相流动, 阻力压降, 相间摩擦力

Abstract:

In order to investigate the characteristics of twophase flow resistance in packed porous media, the experiments of airwater twophase flow in packed beds with spherical particles of different sizes are performed by the test facility of DEBECO (Debris Bed Coolability). Based on the experimental data, the calculative results by different predictive models are compared and verified, and the influence of interfacial drag on pressure drop for twophase flow is analyzed emphatically. The results show that the effects of the interfacial drag on twophase flow pressure drop are negligible for packed beds with smallsize (e.g. d=1.5mm) particles, and the twophase flow pressure drop curves show an increasing tendency with the increase of air flowrates. The interfacial drag has significant influence on twophase flow pressure drop for packed beds with largesize (e.g. d=6.0mm) particles at low liquid velocities , and has a descentascent tendency in the pressure drop curve.

中图分类号:

TK 124

邹旭毛，李良星，孔刘波，王华胜. 颗粒堆积床内两相流动阻力及相间摩擦力[J]. 上海交通大学学报（自然版）, 2017, 51(4): 470-.

ZOU Xumao, LI Liangxing, KONG Liubo, WANG Huasheng. TwoPhase Flow Resistance and Interfacial Drag in Packed Beds[J]. Journal of Shanghai Jiaotong University, 2017, 51(4): 470-.

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