相关实验视频
Updated: Jan 12, 2026

08:34
Visualization of High Speed Liquid Jet Impaction on a Moving Surface
Published on: April 17, 2015
11.9K
关于旋转形旋转机模型大滴滴阻塞特征的研究
Yaping Hu1, Yuetao Jiang1, Dongyin Yu1
1Nanjing University of Aeronautics and Astronautics, Nanjing 210000, China.
Langmuir : the ACS journal of surfaces and colloids
|November 4, 2025
概括
这项研究分析了超冷的大液滴对旋转圆的碰撞. 较大的水滴显示出更高的收集系数,分布模式在测试速度和速度之间一致.
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
- 材料科学 材料科学 材料科学
背景情况:
- 准确预测超冷大液滴 (SLD) 碰撞对于理解冰的积累和制定有效的抗结冰策略至关重要.
- 现有的模型往往需要对复杂的几何形状和不同的滴滴大小进行改进.
研究的目的:
- 在旋转的形表面上实验性地研究超冷的大液滴的撞击特性.
- 根据实验数据开发和验证SLD冲击的纠正模型.
主要方法:
- 设计了一个实验设置,使用旋转的形旋转器和染色方法进行可视化.
- 色度分析量化了色度值,以确定局部收集系数分布.
- 一个半经验模型与实验结果进行校准,用于模拟.
主要成果:
- 当地收集水系数在停滞区达到峰值,并在下游的形表面下降.
- 对于146和230微米的较大的中位体体积直径 (MVDs),相比71微米,滴滴收集效率更高.
- 收集系数的分布在不同的传入速度和旋转速度中显示出一致性.
结论:
- 该研究提供了SLD对旋转形表面的冲击的验证模型.
- 了解滴滴撞击对于设计高效的抗结冰系统至关重要.
- 较大的SLD表现出明显的冲击行为,必须在空气动力学设计中考虑.
相关概念视频
Typical Model Studies
613
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
613
Principle of Angular Impulse and Momentum
1.2K
The angular impulse and momentum principle provides insights into how forces applied at a distance from an object's rotational axis influence its angular velocity. It builds upon the crucial relationship between the moment of force and angular momentum. By integrating this equation, substituting the limits for the initial and final times, a comprehensive expression representing the angular impulse and momentum principle is derived.
1.2K
Design Example: Creating a Hydraulic Model of a Dam Spillway
662
Scaled hydraulic models of dam spillways provide a practical way to replicate and study the intricate flow dynamics of these structures. Often built to a 1:15 ratio, these models allow for observing critical water behavior, such as velocity distribution, flow patterns, and energy dissipation.
662

