评估不同到期条件下的人类呼吸道空气流动不稳定性
Hao Jing1, Haiwen Ge2, Hui Tang3
1School of Aerospace Engineering, Huazhong University of Science and Technology, Wuhan, China.
Journal of biomechanics
|December 28, 2023
概括
人类呼吸系统模型中的呼气流是高度动荡的,特别是在口腔 - 喉. 了解呼气流动力学需要考虑短暂的呼气和眼球运动,以准确评估流.
科学领域:
- 流体动力学 流体动力学
- 呼吸系统生理学 呼吸系统生理学
- 生物医学工程 生物医学工程
背景情况:
- 准确了解人类呼吸道空气流对于诊断和治疗呼吸道疾病至关重要.
- 以前的模拟经常简化了呼气条件,可能导致不准确的流评估.
研究的目的:
- 在人类呼吸道模型中,研究不同呼吸道条件对空气流动流的影响.
- 用功率光谱密度 (PSD) 和光谱 (SE) 量化评估空气流动不稳定性.
主要方法:
- 大模拟 (LES) 和动态网状技术被用于模拟呼气气流.
- 在各种过期条件下进行模拟,包括短暂的过期流动和眼球运动.
- 使用功率光谱密度 (PSD) 和光谱 (SE) 分析了空气流不稳定性.
主要成果:
- 空气流在口腔 - 喉区域表现出高流,受到短暂的呼气和喉运动的影响.
- PSD分析显示,当同时考虑过渡性失效和眼球运动时,宽带衰减频谱发生了显著的变化.
- SE分析表明气管中的流过渡和软附近的潜在多重过渡,流强度根据所考虑的呼气因素而变化.
结论:
- 呼气流的特征受到模拟的特定呼气条件的显著影响.
- 精确评估呼气气流需要结合临床测量的呼气数据,以反映现实世界的条件.
- 这项研究强调了全面建模对于理解呼吸道空气流动力学的重要性.
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