TY - JOUR
T1 - Stability Analysis of Cavitation Surge in Hydraulic System Considering Response Delay of Cavitating Pump
AU - Nemoto, Kanata
AU - Kang, Donghyuk
AU - Kambayashi, Izuru
AU - Tsuru, Wakana
AU - Watanabe, Satoshi
AU - Yokota, Kazuhiko
N1 - Funding Information:
This work was supported by Japan Society for the Promotion of Science (JSPS) KAKENHI Grant Number 19K04188.
Publisher Copyright:
© 2022, Turbomachinery Society of Japan. All rights reserved.
PY - 2022
Y1 - 2022
N2 - Cavitation surge is a system instability caused by mutual interference between cavitation and a hydraulic system. A stability analysis for the cavitation surge was performed based on the unsteady characteristics of the cavitating pump, that is, the response delay of the pressure rise against the suction and discharge flow and suction pressure oscillations. Ordinary differential equations were derived from linear unsteady momentum and continuity equations, and the simplified-derived ordinary differential equations clearly show the onset criteria of stability and dynamic instabilities. The relatively short discharge and large suction pipe loss had a stabilizing effect on the cavitation surge. The positive quasi-steady suction and discharge flow gains as well as the negative quasi-steady suction pressure gain cause surge instability. The phase advance of the pressure rise against the flow and pressure oscillations also leads to surge instability.
AB - Cavitation surge is a system instability caused by mutual interference between cavitation and a hydraulic system. A stability analysis for the cavitation surge was performed based on the unsteady characteristics of the cavitating pump, that is, the response delay of the pressure rise against the suction and discharge flow and suction pressure oscillations. Ordinary differential equations were derived from linear unsteady momentum and continuity equations, and the simplified-derived ordinary differential equations clearly show the onset criteria of stability and dynamic instabilities. The relatively short discharge and large suction pipe loss had a stabilizing effect on the cavitation surge. The positive quasi-steady suction and discharge flow gains as well as the negative quasi-steady suction pressure gain cause surge instability. The phase advance of the pressure rise against the flow and pressure oscillations also leads to surge instability.
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U2 - 10.5293/IJFMS.2022.15.4.401
DO - 10.5293/IJFMS.2022.15.4.401
M3 - Article
AN - SCOPUS:85140368862
SN - 1882-9554
VL - 15
SP - 401
EP - 410
JO - International Journal of Fluid Machinery and Systems
JF - International Journal of Fluid Machinery and Systems
IS - 4
ER -