用超声速气流产生冰晶的试验及测定

THE EXPERIMENT AND DETERMINATION OF ICE CRYSTAL PRODUCED BY SUPERSONIC AIR FLOW

中文关键词:  超声速气流  膨胀冷却  云室试验  冰核化  消过冷雾

英文关键词:Supersonic air flow  Expansion cooling  Cloud chamber experiment  Ice nucleation  Supercooled fog dissipation

中文摘要:

      在2m³等温云室中进行了塑料小泡压爆及超声速气流在过冷雾中产生冰晶性能的试验,在-1℃到-17℃温度范围内测试其产生冰晶效率。发现这两种方法均能在过冷雾中产生大量冰晶,直到-1℃。在-8℃时每升空气产生的冰晶为10¹¹-10¹²量级。是一种经济有效的催化过冷云雾的方法,很有应用前景。

英文摘要:

      The laboratory experiments were carried out in a 2m³ isothermal cloud chamber to study the ice nucleating development by bursting small plastic bubbles and by pressed-air spurted out from a nozzle at supersonic speed. The ice crystal number produced by an unit volume of air from temperature -1 to -17℃ have been determined. It seems that this technique can provide a promising economic method for cold cloud and fog seeding.