"GA105/00/0235" . . . "10"^^ . . "The main objective of the project is to develop viable ultrasonic nozzle device for generating of modulated high-speed water jets for applications in mining (rock disintegration) and construction engineering (concrete disintegration). Fundamental processes occurring both within and outside the nozzle during ultrasonic modulation of the jet will be defined. The development of the ultrasonic nozzle device for modulation of high-speed water jets will be aimed at modulation produced by the vibrating tip placed inside the nozzle. Highly complex dynamics of the modulated flow will be studied both theoretically using CFD methods and experimentally using methods of direct measurement of impact forces generated by modulated jets. Based on conclusions frothe theoretical and experimental analyses, the ultrasonic nozzle device will be optimized and redesigned to provide reliable and efficient mean for modulation of high-speed water jets. The successful development of reliable ultrasonic nozzle device will"@en . . "Forced modulation of water jet by ultrasonic"@en . . . "Nucen\u00E1 modulace vodn\u00EDho paprsku ultrazvukem" . . "C\u00EDlem projektu %22Nucen\u00E1 modulace vodn\u00EDho paprsku ultrazvukem%22 stanoven\u00FDm \u0159e\u0161itelem byl v\u00FDzkum a v\u00FDvoj ultrazvukov\u00E9 trysky pro generov\u00E1n\u00ED modulovan\u00FDch vysokorychlostn\u00EDch vodn\u00EDch paprsk\u016F. Tyto trysky podstatn\u011B sni\u017Euj\u00ED energetickou n\u00E1ro\u010Dnost p\u0159i vlastn\u00EDm \u0159ez"@cs . . . "2008-05-19+02:00"^^ . . "0"^^ . "Hlavn\u00EDm c\u00EDlem projektu je v\u00FDvoj spolehliv\u00E9 ultrazvukov\u00E9 trysky pro generov\u00E1n\u00ED modulovan\u00FDch vysokorychlostn\u00EDch vodn\u00EDch paprsk\u016F, p\u0159edev\u0161\u00EDm pro aplikace v hornictv\u00ED (rozpojov\u00E1n\u00ED horninov\u00FDch materi\u00E1l\u016F) a ve stavebnictv\u00ED (rozpojov\u00E1n\u00ED betonu). Definov\u00E1ny budouz\u00E1kladn\u00ED d\u011Bje prob\u00EDhaj\u00EDc\u00ED p\u0159i ultrazvukov\u00E9 modulaci paprsku jak uvnit\u0159 tak i vn\u011B trysky. V\u00FDvoj ultrazvukov\u00E9 trysky pro modulaci vysokorychlostn\u00EDch vodn\u00EDch paprsk\u016F bude zam\u011B\u0159en na modulaci generovanou vibruj\u00EDc\u00EDm hrotem vlo\u017Een\u00FDm do trysky. Budou studov\u00E1ny slo\u017Eit\u00E9 dynamick\u00E9 d\u011Bje, ovliv\u0148uj\u00EDc\u00ED chov\u00E1n\u00ED modulovan\u00E9ho proudu vody, a to jak teoreticky s vyu\u017Eit\u00EDm metod CFD , tak experiment\u00E1ln\u011B, s vyu\u017Eit\u00EDm metod p\u0159\u00EDm\u00E9ho m\u011B\u0159en\u00ED impaktn\u00EDch sil generovan\u00FDch dopadem modulovan\u00E9ho paprsku. Na z\u00E1klad\u011B z\u00E1v\u011Br\u016F z teoretick\u00FDci experiment\u00E1ln\u00EDch anal\u00FDz bude provedena optimalizace ultrazvukov\u00E9 trysky tak, aby se stala spolehliv\u00FDm a \u00FA\u010Dinn\u00FDm prost\u0159edkem pro modulaci vysokorychlostn\u00EDch vodn\u00EDch paprsk\u016F. \u00DAsp\u011B\u0161n\u00FD v\u00FDvoj ultrazvukov\u00E9 trysky umo\u017En\u00ED v\u00FDrazn\u00E9 zv\u00FD\u0161en\u00ED v\u00FDkonnosti technologie" . . . . . "0"^^ . . "1"^^ . . "Neuvedeno."@en . "http://www.isvav.cz/projectDetail.do?rowId=GA105/00/0235"^^ . . "10"^^ . .