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SINGLE-PHASE TRANSIENT IN SINGLE-ELBOW PIPE

机译:单弯管的单相瞬变

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摘要

Mathematical and numerical model needed for description of single-elbow pipe movement in horizontal Z-Y plane coupled with one-dimensional single-phase fluid dynamics is described and discussed. The governing phenomenon is also known as two-way Fluid-Structure Interaction. Standard Skalak's four-equation model was improved with additional four Timoshenko's beam equations for description of flexural displacements and rotations. The applied model was solved with improved second-order accurate numerical method that is based on Godounov's upwind first-order accurate method. The model was successfully used for simulation of the rod impact induced transient and conventional instantaneous valve closure induced transient in the tank-pipe-valve system. Special attention was made to the applicability of the applied numerical method.
机译:描述和讨论了描述单弯管在水平Z-Y平面中运动以及一维单相流体动力学所需的数学和数值模型。控制现象也称为双向流体-结构相互作用。标准Skalak的四方程模型得到改进,增加了四个Timoshenko的梁方程,用于描述弯曲位移和旋转。应用改进的二阶精确数值方法对应用模型进行求解,该方法基于Godounov的迎风一阶精确方法。该模型已成功用于油箱-气门-阀门系统中杆冲击引起的瞬态和常规瞬时阀关闭引起的瞬态的仿真。特别注意了所应用数值方法的适用性。

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