生物启发的螺旋式泛写仪臂用于高速列车中的空气动力学降噪
Fangying Lou1, Xinbiao Xiao1, Zongfa Zhang1
1State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu 610031, China.
iScience
|October 29, 2025
概括
生物灵感的螺旋臂设计用于高速列车泛流机,可显著降低空气动力学噪音和阻力. 与卷轴或圆柱形配置相比,扭曲的设计提供了优越的降噪和更好的稳定性.
科学领域:
- 流体动力学 流体动力学
- 声学 声学 在声学方面
- 生物模拟学是一种生物模拟学.
背景情况:
- 高速列车上的 Pantograph 是空气动力学噪音的重要来源.
- 在泛相机臂和头周围的旋是产生声音的主要贡献者.
研究的目的:
- 为了研究生物灵感的螺旋臂设计用于泛相机.
- 为了减少空气动力学噪音和提高高速列车的效率.
主要方法:
- 使用改进的延迟分离埃迪模拟 (IDDES) 的数值模拟.
- 应用Ffowcs威廉姆斯-霍金斯 (FW-H) 声学类比和声学扰动方程 (APE).
- 评估圆柱形,扭曲式和卷轴式泛象机配置.
主要成果:
- 扭曲的配置减少了68.9%的根-平均-平方升降波动,并降低了平均阻力.
- 扭曲的泛写仪降低了4.2dBA的最大远场声压.
- 近场噪声降低达到了5.4dBA,超过了卷轴设计.
结论:
- 生物模拟螺旋臂的成型有效地减少了泛相机噪声.
- 扭曲的设计增强了稳定性和流量质量,从而导致更安静,更高效的 pantograph 系统.
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