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首页> 外文期刊>Journal of Manufacturing Processes >Numerical analysis of the gas-assisted laser cutting flow from various supersonic nozzles
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Numerical analysis of the gas-assisted laser cutting flow from various supersonic nozzles

机译：来自各种超声喷嘴的气体辅助激光切削流量的数值分析

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摘要

In the present paper, the exit jet patterns from four different supersonic nozzles have been numerically simulated using OpenFOAM (R) Computational Fluid Dynamics (CFD) toolbox. The desired-design operating condition, for each of these nozzles, has been calculated using quasi 1-D gas dynamics theory. Mach number and pressure distributions are presented for each nozzle to illustrate the effect of both the nozzle geometry and the operating conditions on the behaviour of the exit jet. Then, the predicted numerical results have been validated by comparison with the experimental measurements reported in previous literature. As main outcomes, the simulations results are quantitatively in high agreement with the reported experimental observations. The correlations between jet flow stability and divergence angle are discussed and the effect of Mach number and exit diameter on the jet divergence are presented.
机译：在本文中，使用OpenFoam（R）计算流体动力学（CFD）工具箱进行了数值模拟了来自四种不同超音速喷嘴的出口喷射图案。已经使用准1-D气动力学理论计算了这些喷嘴中的每一个的所需设计操作条件。为每个喷嘴提出马赫数和压力分布，以说明喷嘴几何形状和操作条件对出口喷射的行为的影响。然后，通过与先前文献中报道的实验测量相比，已经验证了预测的数值结果。作为主要结果，模拟结果与报告的实验观察结果高度协议。讨论了射流稳定性和发散角之间的相关性，并介绍了马赫数和出口直径对喷射发散的影响。

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