水滴撞击水平壁面的实验研究及数值分析
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V244.1+5;V211.7

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陕西省自然科学基础研究计划一般项目(2021JQ-650);陕西省教育厅科研计划项目(19JK0412)


Experimental Study and Numerical Analysis of Water Droplets Impacting Horizontal Wall
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    摘要:

    针对水滴撞击飞机表面时互相干扰,形成水滴铺展、回弹等动力学行为,使飞机结冰机理更加复杂的问题,对不同条件下水滴撞击壁面的影响特性展开研究。通过实验与数值模拟相结合的方法研究了水滴直径、壁面温度、壁面材料以及初始速度等条件与水滴的铺展和回弹过程之间的关系,并得到铺展系数与各影响参数之间的关联式。研究结果显示:增大水滴直径对最大铺展具有促进作用;壁面温度越大对水滴铺展越有利,但壁面温度过低时,会导致水滴底部冻结,铺展和回弹受限制;壁面材料为有机玻璃,对铺展最有利;水滴初始速度越大越有利于水滴铺展。

    Abstract:

    Aiming at the problem that water droplets interfere with each other when they impact aircraft surface, resulting in dynamic behaviors such as spreading and rebound of water droplets, which makes aircraft icing mechanism more complicated. Therefore, in this paper, the influence characteristics of water droplets hitting the wall under different conditions are studied. The relationship between the droplet diameter, the wall temperature, the wall material, the initial velocity and the droplet spreading and springback process is studied by combining experimental and numerical methods, and the correlation formula between the spreading coefficient and the influential parameters is obtained. The results show that increasing droplet diameter can promote the maximum spread. The higher the wall temperature is, the more favorable the droplet spreading is. However, when the wall temperature is relatively low, the droplet bottom freezes while the spreading and rebound are restricted. It is also shown that the wall material is plexiglass, which is the most favorable for spreading, and that the larger the initial droplet velocity is, the better the droplet spreading is.

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孙金绢,马志恒,邵朝腾,田建辉.水滴撞击水平壁面的实验研究及数值分析[J].河北工程大学自然版,2022,(3):99-106

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  • 收稿日期:2022-03-26
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  • 在线发布日期: 2022-10-25
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