图 书 馆
空化气泡-好的，坏的和美丽的Cavitation bubbles – the good, the bad and the beautiful |
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| 课程网址: | http://videolectures.net/zv_dular_cavitation_bubbles/ |
| 主讲教师: | Barbara Resse |
| 开课单位: | 新戈里卡大学 |
| 开课时间: | 2018-06-04 |
| 课程语种: | 英语 |
| 中文简介: |  压力突然下降会触发在液体介质内形成蒸气和气泡（也称为空化）。这导致许多（关键）工程问题：附近表面的损坏，液压机械的噪音和振动。即使是太空发射器的推进也受到触发燃料涡轮泵中气蚀的条件的限制。另一方面，空化是潜在的有用现象：极端条件越来越多地用于各种应用中，例如表面清洁，增强化学性能和废水处理（消灭细菌和灭活病毒）。尽管自牛顿时代以来就对空化现象进行了深入研究，但在理解造成空化作用的机理及其应用之间仍存在巨大差距–近年来，先进的实验和数值技术使人们对空化现象有了越来越详细的了解。 ，但我们仍然无法回答这个基本问题：气泡究竟如何破坏材料，清洁，消毒，杀死细菌并增强化学活性的机制是什么？ |
| 课程简介: | A sudden decrease in pressure triggers the formation of vapor and gas bubbles inside a liquid medium (also called cavitation). This leads to many (key) engineering problems: damage of the nearby surfaces, noise and vibration of hydraulic machinery. Even the propulsion of space launchers is limited by the conditions that trigger cavitation in fuel turbopumps. On the other hand, cavitation is a potentially a useful phenomenon: the extreme conditions are increasingly used for a wide variety of applications such as surface cleaning, enhanced chemistry, and waste water treatment (bacteria eradication and virus inactivation). Despite cavitation is intensively studied since the time of Newton, a large gap persists between the understanding of the mechanisms that contribute to the effects of cavitation and its application – in the last years advanced experimental and numerical techniques enable more and more detailed insights into the phenomenon, but we are still not able to answer the fundamental question: What precisely are the mechanisms how bubbles can damage materials, clean, disinfect, kill bacteria and enhance chemical activity? |
| 关 键 词: | 空化; 数值技术; 空化机制 |
| 课程来源: | 视频讲座网 |
| 数据采集: | 2020-11-03：cjy |
| 最后编审: | 2020-11-04：zyk |
| 阅读次数: | 70 |