Ionic Charge Emission Into Fog From a Remotely Piloted Aircraft
Ionic Charge Emission Into Fog From a Remotely Piloted Aircraft
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DOI：
10.1029/2022gl099827
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发表时间：
2022-09
影响因子：
5.2
通讯作者：
R. Harrison;K. Nicoll;G. Marlton;Douglas J. Tilley;Pejman Iravani
中科院分区：
文献类型：
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作者：
R. Harrison;K. Nicoll;G. Marlton;Douglas J. Tilley;Pejman Iravani
电荷影响液滴的性质，例如蒸发速率、流体动力学稳定性和粘附概率。因此，修改液滴电荷提供了影响雾或云的可能方法。一架装有仪表的遥控飞机已配备了正负电晕发射器，以引起液滴充电。在20 m高空盘旋条件下，比较了晴空和自然雾中离子释放的效果。在晴朗的空气中，每当发射器被激活时，表面大气电场就会发生变化，但当飞机经过先前电离的空气时，短波辐射没有显着差异。在雾中，辐射起伏在任一发射器操作之前或当两个发射器都操作时呈现高斯分布，但在单极离子发射期间呈现不同的分布。引入单极离子导致雾反射率的最大变化为0.2%，约25 s后。
Charge influences the properties of liquid droplets, such as evaporation rates, hydrodynamic stability, and sticking probabilities. Modifying droplet charge therefore provides a possible method of influencing fogs or clouds. An instrumented, remotely piloted aircraft has been equipped with positive and negative corona emitters to cause droplet charging. With the aircraft circling at 20 m altitude, effects of ion release were compared in clear air and natural fog. In clear air, the surface atmospheric electrical field changed whenever the emitters were activated, but without significant differences in the short‐wave radiation as the aircraft passed over previously ionized air. In fog, radiation fluctuations showed a Gaussian distribution before either emitter operated or when both emitters were operating, but with different distributions during unipolar ion emission. Introducing unipolar ions led to a maximum change in fog reflectivity of ∼2%, about 25 s later.