作　　者： ; ; ; ; ;

机构地区： 南京大学

出　　处： 《声学技术》 2002年第4期185-187,共3页

摘　　要： 文章研究了超声喷泉的温度特性。测量表明,自由喷射时超声喷泉内的温度上升速率随高度而增加,接近水平面高度时增加更快,邻近喷泉顶点时达到最大。若对超声喷泉进行聚束喷射,那么这种温度上升速率显著提高,并且采用全程聚束时高于半程聚束,锥形管聚束时高于柱形管聚束,但无论采用哪种聚束方式喷射,超声喷泉内的温度上升速率均在1min左右趋于饱和。 In this paper, the temperature characteristic of ultrasonic fountain is investigated. The experimental results show that the rising rate of temperature in the fountain, when free-jetting, increases with the fountain height, and increases more rapidly at the height near the surface, and reaches the maximum at the near top of the fountain. And the rising rate increases rapidly when beam-jetting, and it is higher for fully-path jetting and cylindroconical tube beam-jetting than that for half-path jetting and cylindrical tube beam-jetting respectively, and whether what beam-jetting is adopted, the rising rate will tend to saturation after about 1 minute.

关 键 词： 超声喷泉 温度特性 自由喷射 聚束喷射

领　　域： [建筑科学] [理学] [理学] [一般工业技术]