Simplified detection of cavitation threshold in control valves

Tomaž Požar (Author), Žan Pirc (Author), Egon Susič (Author), Rok Petkovšek (Author)

Abstract

For industrial monitoring of fluid flows, the transition from a single-phase flow to a cavitation regime is most commonly determined by a microphone that measures the sound emitted in the vicinity of critical constrictions such as in the opening of the control valves. To measure the cavitation threshold, we developed an analogue and robust piezoelectric detection method. The evaluation of this method on the reference test orifice plate and on a chosen control valve shows that it eliminates the sound noise of an industrial environment, largely removes the subjectivity of the operator and enables a more detailed observation of the cavitation phenomenon.

Keywords

cavitation;cavitation threshold;piezoelectric sensors;acoustic emission;nondestructive testings;

Data

Language:	English
Year of publishing:	2020
Typology:	1.01 - Original Scientific Article
Organization:	UL FS - Faculty of Mechanical Engineering
UDC:	532.528(045)
COBISS:	17094171
ISSN:	0003-682X
Views:	799
Downloads:	607
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary title:	Poenostavljeno zaznavanje kavitacijskega praga v regulacijskih ventilih
Secondary abstract:	Za industrijsko spremljanje toka tekočin se prehod iz enofaznega toka v kavitacijski režim najpogosteje določa z mikrofonom, ki meri zvok, ki izvira v bližini kritičnih zožitev, kot je na primer reža v regulacijskih ventilih. Za merjenje kavitacijskega praga smo razvili analogno in robustno piezoelektrično metodo zaznavanja. Evaluacije te metode na plošči z referenčno preskusno odprtino in na izbranem regulacijskem ventilu kaže, da ta metoda odstrani hrup industrijskega okolja, v veliki meri odpravi subjektivnost upravljavca in omogoči podrobnejše opazovanje pojava kavitacije.
Secondary keywords:	kavitacija;kavitacijski prag;piezoelektrični senzorji;akustična emisija;nedestruktivna testiranja;
Type (COBISS):	Article
Embargo end date (OpenAIRE):	2022-03-16
Pages:	str. 1-6
Issue:	ǂVol. ǂ165
Chronology:	Avg. 2020
DOI:	10.1016/j.apacoust.2020.107320
ID:	11451024