Detekcija praga kavitacije na regulacijskem ventilu z različnimi tipali

Blatnik, Blaž (author), Požar, Tomaž (mentor), Petkovšek, Rok (comentor)

Do kavitacije pride v zožitvah, kjer v toku tekočine nivo tlaka pade pod nivo tlaka uparjanja. Na teh mestih se tvorijo parni mehurčki. Njihovi kasnejši kolapsi povzročijo hrup in lahko poškodujejo material v bližini kavitacije. Izbrali smo metodo, s katero smo na regulacijskemu ventilu merili prag kavitacije z različnimi piezoelektričnimi tipali in preučili sposobnost zaznavanja praga kavitacije posameznega tipala. Na podlagi meritev smo ugotovili, da je med izbranimi tipali z izbrano detekcijsko metodo za določanje praga najbolj primerno tipalo DT1-052K/L. S tem tipalom smo izmerili hrup na različnih mestih pred in za regulacijskim ventilom.

• Language: Slovenian
• Keywords: regulacijski ventili kavitacija kavitacijski prag mikrocurek senzorji piezoelektrični film
• Work type: Bachelor thesis/paper
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2017
• PID: 20.500.12556/RUL-95522
• Publication date in RUL: 20.09.2017

Secondary language

• Language: English
• Title: Detection of cavitation threshold on a control valve with different sensors heads

Abstract

Cavitation occurs, where the liquid flow narrows and the water pressure drops below vapour pressure. As a result, bubbles full of vapour start to appear. Their later collapse are the cause for making noises and may damage the surface near cavitation. In chosen method we measured the cavitation threshold on the control valve with various piezoelectric sensors and examined the ability to detect the cavitation threshold of an individual sensor. From the results we concluded that cavitation threshold was best measured using the DT1-052K/L sensor. With this sensor we measured the cavitation noise on multiple places in the front and back of control valve.

• Keywords: control valves cavitation cavitation threshold microjet sensors piezoelectric film