| 孔绍康,杜丽杰.小水滴在风洞气流中的跟随性[J].装备环境工程,2020,17(2):91-96. KONG Shao-kang,DU Li-jie.Follow Features of Water Droplets in Wind Tunnel[J].Equipment Environmental Engineering,2020,17(2):91-96. |
| 小水滴在风洞气流中的跟随性 |
| Follow Features of Water Droplets in Wind Tunnel |
| 投稿时间：2019-08-17 修订日期：2019-09-29 |
| DOI：10.7643/issn.1672-9242.2020.02.016 |
| 中文关键词: 风洞 跟随性 粒径 |
| 英文关键词:wind tunnel follow features particle size |
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| 中文摘要: |
| 目的 获得风挡加温除雨系统试验台翼型上喷雾喷头排列方式和风洞实验风速的最优组合，同时获得不同风速下小水滴在风洞沿程的跟随性和风洞出口截面上质量分数及均匀性等理论数据。方法 采用数值模拟方法，对风挡加温除雨系统试验台的风洞和喷头部分进行建模仿真，模拟7个翼型上共60个均布喷头在4类不同进口风速、2类喷头喷速下的8种实验过程。结果 得到小水滴在风洞不同实验条件下沿程跟随性的变化规律，同时得到风洞出口处小水滴的分布结果。结论 风洞风速越小，喷头喷射发散性越好，而小水滴跟随性越差；反之，风洞风速越大，喷头喷射发散性越差，而小水滴跟随性越好。风洞出口小水滴质量分数随风速增大呈现先高后低的规律，而均匀性随风速增大而变好。 |
| 英文摘要: |
| The paper aims to obtain the optimal combination of spray nozzle arrangement on the airfoil and wind tunnel test speed of the windshield heating and dewatering system test platform and obtain the following characteristics of the small water droplets along the wind tunnel, the mass fraction and the uniformity at the outlet of the wind the wind tunnel. The wind tunnel and nozzle parts of the windshield heating and dewatering system test platform were modeled and simulated through numerical simulation. There were 8 experimental processes of sixty uniformly spray nozzles on seven airfoils and four different inlet wind speeds and two nozzle test parameters were simulated. The regularity of small water droplet follow feature along the wind tunnel under different experimental conditions and the distribution result of small water droplets at the exit of the wind tunnel were obtained.The results showed that the smaller the wind tunnel speed, the better the divergence of nozzle and the worse the follow feature. On the contrary, the larger the wind tunnel speed, the worse the divergence of nozzle and the worse the follow feature of small water droplets. With the increased of wind speed, the mass fraction of small water droplets at the outlet of wind tunnel first rises and then decreases, and the uniformity becomes better with the increase of wind speed. |
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