Physical explosion causes large damages in the process industry and quite often escalates to chemical explosions. The shock waves generated by such events are challenging to model and they must be numerically captured without spurious oscillations in order to make an accurate estimative of the accidental effects. In this context, this paper investigates how a new high order numerical scheme models the physical explosion. We have considered a confined explosion in a spherical vessel and blast load throughout pipelines as the framework to investigate the performance of the numerical scheme. The developed numerical approach considers the effect of less smooth substencils when there is a discontinuity inside the stencil based on the local Mach number what avoids oscillations and instability. The numerical solution of the fundamental equations is coupled with the Modified Colebrook-White formulation in order to consider the blast load through the pipeline. Shock waves from experimental data and analytical model are used to validate the proposed model. The research provides an efficient method for prediction of blast loads from spherical vessels rupture to an open atmosphere and in pipelines.

中文翻译：

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一种用于爆炸建模的增强加权基本非振荡高阶方案

物理爆炸会在过程工业中造成巨大破坏，并且经常升级为化学爆炸。此类事件产生的冲击波难以建模，必须在没有虚假振荡的情况下以数值方式捕获它们，以便准确估计意外影响。在此背景下，本文研究了新的高阶数值方案如何模拟物理爆炸。我们已经考虑了球形容器中的受限爆炸和整个管道的爆炸载荷作为研究数值方案性能的框架。当模板内部存在不连续性时，所开发的数值方法会根据避免振荡和不稳定性的本地马赫数考虑不太平滑的子模板的影响。基本方程的数值解与修正的 Colebrook-White 公式相结合，以考虑通过管道的爆炸载荷。来自实验数据和分析模型的冲击波用于验证所提出的模型。该研究为预测​​从球形容器破裂到开放大气和管道中的爆炸载荷提供了一种有效的方法。