静水中较大气泡运动特性实验研究  

Experimental Investigation on Motion Characteristics of Relative Large Bubble

作　　者：李仲春[1,2] 宋小明[3] 姜胜耀[1] 俞冀阳[1] Mamoru Ishii 

机构地区：[1]清华大学,北京100084 [2]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610041 [3]中国核动力研究设计院,成都610041 [4]普渡大学,美国47906

出　　处：《核动力工程》2015年第1期161-164,共4页Nuclear Power Engineering

基　　金：中国核动力研究设计院核反应堆系统设计技术重点实验室基金

摘　　要：对较大气泡在静水中的水力学特性、气泡上升速度、气泡形状与曳力系数等进行研究。气泡的产生是通过将特定体积的气泡存放在倒置的球帽杯中,然后释放到静水中。气泡的运动特性通过高速摄像仪捕捉,气泡相关运动参数通过数字图像处理程序得到。实验得到不同尺寸气泡在静水中上升的特性,并将实验结果与现有的曳力模型进行比较,表明Tomiyama等关系式对于曳力以及气泡最终上升的预测比Ishii-Chawa模型好,较大气泡的形状具有一定的相似性。实验结果对存在较大气泡的两相流动特性以及相间交换特性有重要意义。The bubble hydrodynamics characteristics such as the bubble rising velocity, bubble shape and drag coefficient was studied. The bubble was generated using a hemisphere cup to collect specific volume and released to the still water manually. The bubble motion was captured by high speed camera. The parameter was obtained by digital image process routines. The rising behaviors of bubble with different size in still water were investigated. The comparison with existed drag coefficient correlation indicated that Tomiyama was better than Ishii and Chawa. There were similarities for the shape for relative large bubble. The experimental result was beneficial to the basic understanding of the flow dynamics and inteffacial exchange where relative large bubble existed.

关 键 词：球帽型气泡 运动特性 曳力 

分 类 号：TL334[核科学技术—核技术及应用]