Observation of multibubble phenomena in an ultrasonic reactor

Autor:	Chaoqun Wu, Noritoshi Nakagawa, Yasuhisa Sekiguchi
Rok vydání:	2007
Předmět:	Fluid Flow and Transfer Processes Materials science Mechanical Engineering General Chemical Engineering Bubble Acoustics Aerospace Engineering Conical surface Standing wave Transducer Nuclear Energy and Engineering Tap water Cavitation Horn (acoustic) Ultrasonic sensor
Zdroj:	Experimental Thermal and Fluid Science. 31:1083-1089
ISSN:	0894-1777
DOI:	10.1016/j.expthermflusci.2006.11.005
Popis:	A cylindrical ultrasonic reactor radiated by a BLT (bolted Langevin transducer) with a large horn operated at 27.3 kHz was employed to investigate the behaviors of bubbles in the present research. The characteristics of this reactor were analyzed using experimental methods. It was found that traveling transient bubbles can eliminate the effect of standing wave on cleaning efficiency. Fresh tap water and degassed water were employed as test liquids. In tap water, a conical cavitation structure was observed as the input voltage of transducer was increased over 100 V. The detail of the conical cavitation structure was anatomized and its shape varied with the change of input voltage. In degassed water, ultrasonic fireworks were observed and special attention was paid to their subsequences, snowflake bubble clouds and water jet.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b9d8054378a834f9dfe908285a7e5597 https://doi.org/10.1016/j.expthermflusci.2006.11.005 Zobrazit plný text záznamu Full Text from ScienceDirect