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在激光能量实验室对超音速气体喷气喷嘴的预测性能模型的验证
K R McMillen1, P V Heuer1, J M Gjevre2
1University of Rochester's Laboratory for Laser Energetics, Rochester, New York 14623, USA.
The Review of scientific instruments
|July 17, 2024
概括
我们从OMEGA激光实验中使用的超音速喷嘴中特化了中性密度分布. 模拟准确预测气体流量,匹配实验测量以提高激光系统性能.
科学领域:
- 流体动力学 流体动力学
- 血物理学的等离子体物理学
- 激光驱动的惯性封闭核聚变.
背景情况:
- 超音速喷嘴是像OMEGA-60和OMEGA-EP这样的激光系统中的关键组件.
- 准确地描述中性密度分布对于优化激光性能和实验结果至关重要.
- 复杂的流量现象,包括粘性效应,气体膨胀和冲击波,挑战喷嘴出口以上的流量预测.
研究的目的:
- 用于描述OMEGA-60和OMEGA-EP激光系统中使用的超音速喷嘴产生的中性密度分布.
- 对实验测量进行计算流体动力学 (CFD) 模拟的验证.
- 提供关键流量参数的分析和数据驱动模型.
主要方法:
- 使用了包含LLE喷嘴规格的轴对称Fluent®模拟.
- 使用四波剪切干扰仪对中性密度分布进行实验测量.
- 开发了高原长度的分析形式,并安装了边界层厚度,平均高原密度和密度坡道的模拟数据.
主要成果:
- 差价合约模拟显示与实验中性密度测量有很好的一致性.
- 成功地获得了高原长度的分析形式.
- 对边界层厚度,平均高原密度和密度坡道作为喷嘴偏移和背压的函数的实证匹配得到了.
结论:
- 差价合约模拟是预测OMEGA激光系统中超音速喷嘴中中性密度分布的可靠工具.
- 描述为优化喷嘴设计和激光实验条件提供了有价值的数据.
- 这些发现有助于更好地了解激光驱动的核聚变研究中的气体动力学.
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