This paper aims to demonstrate possibilities of acoustic emission as a hydraulic machinery diagnostics tool. Especially for exposing presence of ruptures or cracks in parts of the machine, assuming changes in acoustic signal of the part during its operation. Demonstration is based on series of simple measured experiments, which consist of monitoring the preloaded bolt placed in water stream inside of a pipe to simulate effect of crack size. Outputs are charts with effective values comparing spectrums of each configuration to judge the effects of parameter changes. The methodology of the acoustic emission can also be applied to study hydrodynamic cavitation and its acoustic exhibition.
REFERENCES
1.
S. W.
Smith
, “Chapter 10: Fourier Transform Properties: Parseval’s Relation,” In: The Scientist and Engineer’s Guide to Digital Signal Processing
. (California Technical Publishing
, San Diego
, 1997
).2.
M.
Příban
, Metoda akustické emise I: Obecná část - základní principy
, (Česká společnost pro NDT
, Brno
, 2012
).3.
4.
P.
Rudolf
, M.
Hudec
, P.
Zubík
and D.
Štefan
, “Experimental measurement and numerical modeling of cavitating flow in converging-diverging nozzle
,” In EPJ Web of Conferences
, (EDP Sciences
, Les Ulis, France
, 2012
).5.
P.
Rudolf
, M.
Hudec
, M.
Gríger
and D.
Štefan
, “Characterization of the cavitating flow in converging-diverging nozzle based on experimental investigations,” In EPJ Web of Conferences
, (EDP Sciences
, Les Ulis, France
, 2014
).6.
J.
Kozák
, “Investigation off the Cavitation Within Venturi Tube: Influence of the Generated Vortex,” In Advances in Hydroinformatics
, edited by P.
Gourbesville
, et al (Springer
, Singapore
, 2018
), pp 1049
–1067
.
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