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工程力学  2015 

气液固三相管流耦合水击振动特性的参数影响分析

, PP. 233-240

Keywords: 气液固三相流,流固耦合,水击,振动特性,参数影响

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Abstract:

以气液固三相管流为研究对象,采用矢通量分裂法并结合Lax-Wendroff格式和迎风Warming-Beam格式,对浆液池-管道-阀门系统的耦合水击振动响应进行了数值计算,分析了含气率、固液密度比以及固液弹模比等参数对系统振动特性的影响。结果表明:增加含气率可有效地降低压力和应力波速,同时削弱流体压力波动和管道振动强度;当固液密度比增大时,管系振动强度随之增大,系统振动能量的增量主要集中在流体里,造成流体压能升高较快;随着固液弹模比的增加,管系压能和振动强度均增加,但增幅很小;当固液弹模比增加到某种程度后,其对系统压能和振动强度的影响可忽略。

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