The sound radiation of a submerged finite double shell (two concentric cylindrical shells with the entrained fluid) is studied.
对双层壳体（壳间充满流体的同轴圆柱壳）的声辐射进行了研究。
It has shown from the experimental results that the vorticity near the jet boundary region is high in magnitude due to the interaction between the jet fluid and the entrained ambient fluid.
结果表明，由于射流的卷吸及其与环境流体之间的相互作用，使得射流边界处具有很高的涡量；
The flow of fluid in the entrained slagging coal powder combustor are analysed. Specially, the center reflux area and its effects on the flow of fluid slag are analysed.
分析了液排渣粉煤燃烧器内的流体流动问题，着重分析了中心回流区及其作用。
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