Nozzle Processing Using Ultrasonic Cavitation Jet

使用超声波空化射流进行喷嘴加工

• 批准号: 14550115
• 负责人: AOYAGI Ryoji
• 金额: $ 1.86万
• 依托单位: Sendai National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550115/
• 关键词: ultrasonic; cavitation; fluid dynamic; jet flow; metal processing; deaerated water; パブル発生崩壊; CCD顕微鏡; バブル発生崩壊; 流体力学; 金属加工; ジェット水流; 噴射ノズル; ランジュバン超音波振動子

There is abrasion action for cavitation and progressing flow to occur by a high-intensity ultrasonic. It is a study to use this for the finish processing of the fuel jet nozzle for small gasoline engines. In comparison with a conventional method, superior action is expected. As a result, burr of drill processing equal to or less than,10 micron was almost removed, and flow quantity increased. Shape transformed the large burr than it, but the removal was not possible. From these results, we examined usage of effective cavitation energy. The one is elucidation of processing mechanism of ultrasonic cavitation. This year did this study.An experimental deviceThe ultrasonic vibrator added exponential horn for amplitude expansion to used it for emission of the cavitation which was high-intensity. The vibrator drove it at 28 kHz 150W. An experimental device has structure to drain an unnecessary bubble by cavitation. The emission medium of cavitation used high deaerated city water. The observation water tank was made with a transparent acrylic pipe. It is structure to do a trap of a bubble in node of acoustic field. I grow up after generation, and a bubble takes a collapsing process at last. We observe a change of shape of a bubble for cavitation intensity and sound pressure of a moment of collapse.Observation of a cavitation bubbleA diameter of a bubble is small with micron order. Generation of a bubble is irregular, and the movement is intense. We observed this cavitation bubble with a high speed CCD microscope. Magnification at the maximum is 800. It was difficult that a photography area was small observation a phenomenon for a second. Some observation succeeded by many trials. Furthermore, acoustic luminescence with collapse of a cavitation bubble was observed.

高强度超声波对空化和前进流的产生有磨蚀作用。将其用于小型汽油机喷油嘴的精加工是一项探索。与常规方法相比，预期具有上级作用。结果，等于或小于10微米的钻孔加工毛刺几乎被去除，并且流量增加。形状改变了较大的磨头，但无法取出。根据这些结果，我们检查了有效空化能量的使用。一是阐明超声空化的加工机理。本研究于今年进行，设计了一种实验装置，在超声振子中加入指数变幅杆，使其产生高强度的空化。振动器以28 kHz 150 W驱动它。本发明提供一种实验装置，其具有通过空化来排出不需要的气泡的结构。空化的排放介质为高脱氧的自来水。观察水箱由透明丙烯酸管制成。它是在声场的节点处做气泡陷阱的结构。一代又一代的长大，泡沫最后也要经历一个破灭的过程。我们观察到空泡形状随空化强度和溃灭时刻声压的变化。空泡的观察空泡的直径很小，为微米级。气泡的产生是不规则的，并且运动是激烈的。我们用高速CCD显微镜观察了这种空化泡。最大放大率为800。一个摄影区域很小，很难一秒钟观察一个现象.一些观察结果被许多试验所证实。此外，还观察到了伴随空泡破裂的声发光。

项目成果

Ryoji AOYAGI, Tokuo NIITA: "Jet Nozzle Processing Using Ultrasonic Cavitation."Proceedings of The Eighth Western Pacific Acoustic Conference, 7-9 April, 2003. Melbourne. TE23. (2003)

Ryoji AOYAGI、Tokuo NIITA：“使用超声波空化的喷嘴处理。”第八届西太平洋声学会议记录，2003 年 4 月 7-9 日，墨尔本。

Aoyagi Ryoji: "Jet Nozzle Processing Using Ultrasonic Cavitation"Proceedings of The Eighth Western Pacific Acoustic Conference 7-9th April, 2003 Melbourne. TE-23

Aoyagi Ryoji：“使用超声波空化的喷射喷嘴处理”第八届西太平洋声学会议记录，2003 年 4 月 7-9 日墨尔本。

Ryoji AOYAGI, Tokuo NIITA: "Jet Nozzle Processing Using Ultrasonic Cavitation"Proceedings of The Eighth Western Pacific Acoustic Conference,7-9 April,2003.Melbourne. TE23. (2003)

Ryoji AOYAGI、Tokuo NIITA：“使用超声波空化的喷嘴处理”第八届西太平洋声学会议论文集，2003 年 4 月 7-9 日，墨尔本。

Ryuji AOYAGI, Tokuo NIITA: "Nozzle Processing Using Ultrasonic Cavitation Jet"Proceedings of The Eighth Western Pacific Acoustic Conference 7-9 APRIL, 2003. Melbourne (4 Pages). TE23.

Ryuji AOYAGI、Tokuo NIITA：“使用超声波空化射流进行喷嘴处理”第八届西太平洋声学会议记录，2003 年 4 月 7-9 日，墨尔本（4 页）。

Ryoji AOYAGI, Tetsuo YOSHIDA: "Frequency Equations of an Ultrasonic Vibrator for the Elastic Sensor Using a Contact Impedance Method."Japanese Journal of Applied Physics. Vol.43, No.5B. 3204-3209 (2004)

Ryoji AOYAGI、Tetsuo YOSHIDA：“使用接触阻抗法的弹性传感器的超声波振动器的频率方程。”日本应用物理学杂志。