Acoustics and vibrations in a complex piping network with pump startup-shutdown transients
Acoustics and vibrations in a complex piping network with pump startup-shutdown transients
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DOI：
10.1016/j.ijmecsci.2022.107357
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发表时间：
2022-05
影响因子：
7.3
通讯作者：
F. Ahmed;I. Eames;A. Azarbadegan;E. Moeendarbary
中科院分区：
文献类型：
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作者：
F. Ahmed;I. Eames;A. Azarbadegan;E. Moeendarbary
泵的动态运行条件会导致极端瞬态事件，从而增强管网的响应。快速启动和关闭过程中的主要瞬态主要是针对离心泵进行研究的，而对于往复泵则很少。我们的研究扩展了传统的稳态分析，包括往复泵的动态负载的脉动流引起的声学和振动在复杂的管道网络的效果。利用一维多物理场管道声学模型和梁结构模型，对声-结构耦合引起的强迫响应进行了分析。将动态泵加载（快速启动-关闭事件）期间脉动流的网络响应与稳态泵加载期间脉动流的响应进行比较。在泵的启停运行过程中，伴随着脉动流，管网响应是平面声波和结构振动的瞬态和稳态特性相结合的结果。动态泵负载激发基本的、低频的声学本征模式，其引起类似于管道阀（RPV）系统的管道的瞬态负载。
Pump dynamic operational conditions result in extreme transient events that can enhance the response of piping networks. The predominant transients during rapid startup and shutdown are mainly studied for centrifugal pumps and are scarce for reciprocating pumps. Our study extends the conventional steady-state analysis to include the effect of reciprocating pump dynamic loading on pulsatile flow-induced acoustics and vibrations in a complex piping network. The forced response resulting from acoustical–structural coupling is assessed by utilising the one-dimensional multiphysics piping acoustic model and beam structural model. The network responses to pulsatile flows during dynamic pump loading (rapid start-up-shutdown events) are compared to the responses due to pulsatile flows during steady-state pump loading. With pump startup–shutdowns operations accompanied by pulsatile flows, the network response is the result of the combination of the transient and steady-state characteristics of plane acoustic waves and structural vibrations. The dynamic pump loading excites the fundamental, low-frequency acoustic eigenmode that causes transient loading of pipeline similar to reservoir–pipe–valve (RPV) systems.