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在NACA 0012气形上,从具有统计超负载的液滴信息模拟中获得的取决于冲击的液滴收集效率
Arash Shad1, Hashnayne Ahmed1, Nadim Zgheib2
1Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, USA.
概括
准确的飞机结冰模型取决于理解滴滴撞击. 这项研究使用模拟来显示滴滴大小,空气流速和气面尺寸影响冰块积累,斯托克斯数是关键因素.
科学领域:
- 航空航天工程 航空航天工程
- 流体动力学 流体动力学
- 大气科学 大气科学
背景情况:
- 准确的冰积累建模对于设计有效的飞机防冰系统至关重要.
- 了解滴滴对气形状的冲击是这个领域的一个关键挑战.
研究的目的:
- 通过欧勒-拉格朗奇模拟,分析滴滴对NACA 0012气形状的碰撞.
- 为了研究滴滴大小,空气流速和气面尺寸对冰积累的影响.
- 为了确定控制滴滴撞击行为的关键参数.
主要方法:
- 欧勒-拉格朗奇模拟的液滴装载的流冲击一个NACA 0012气翼.
- 包括八个离散的液滴大小 (1-160微米).
- 自由流速的变化和气形长的变化.
- 使用单向合,忽视滴滴断裂和碰撞.
- 使用统计过载来提高计算效率.
主要成果:
- 滴水收集效率随着滴水大小和自由流速度的增加而增加,但随着气翼尺寸的减少而减少.
- 收集效率,冲击速度和角度主要是由滴滴的斯托克斯数决定的.
- 确定了一个关键的停滞-流线斯托克斯数,从而能够估计冲击的最小滴滴大小.
- 滴滴的行为变得独立于大值的斯托克斯数.
结论:
- 滴滴斯托克斯数是预测冰积累的一个关键参数.
- 这些发现为优化气翼设计和防冰系统提供了洞察力.
- 这项研究为在各种大气条件下更准确的冰积累建模奠定了基础.
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