颗粒浓度对于稠相流动体系中颗粒应力本构方程建立具有决定性的作用.本文采用双流体模型,并结合颗粒流动力学理论来描述固相应力的基础上实现了对喷动床的数值模拟,探讨了从喷射区到环隙区颗粒浓度的理论变化趋势.同时采用自主开发的电容探针技术,不仅颗粒浓度测量值和理论值吻合较好,而且也准确地验证了颗粒非均匀夹带这一现象.电容探针还可灵敏地分辨出环隙区内不同床高处以及接近壁面处的颗粒浓度的细微变化.
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