TY - GEN
T1 - Thermodynamic effect on a cavitating inducer in liquid nitrogen
AU - Yoshida, Yoshiki
AU - Shimagaki, Mitsuru
AU - Kikuta, Kengo
AU - Nakamura, Noriaki
AU - Hasegawa, Satoshi
AU - Tokumasu, Takashi
PY - 2005
Y1 - 2005
N2 - For experimental investigations of the thermodynamic effect on a cavitating inducer, it is nesessary to observe the cavitation. However, visualizations of the cavitation are not so easy in cryogenic flow. For this reason, we estimated the cavity region in liquid nitrogen based on measurements of the pressure fluctuation near the blade tip. In the present study, we focused on the length of the tip cavitation as a cavitation parameter. Comparison of the tip cavity length in liquid nitrogen (80 K) with that in cold water (296 K) allowed us to estimate the strength of the thermodynamic effect. The degree of thermodynamic effect was found to increase with an increase of the cavity length. The estimated temperature depression caused by vaporization increased rapidly when the cavity length extended over the throat. In addition, the estimated temperature inside the bubble nearly reached the temperature of the triple point when the pump performance deteriorated.
AB - For experimental investigations of the thermodynamic effect on a cavitating inducer, it is nesessary to observe the cavitation. However, visualizations of the cavitation are not so easy in cryogenic flow. For this reason, we estimated the cavity region in liquid nitrogen based on measurements of the pressure fluctuation near the blade tip. In the present study, we focused on the length of the tip cavitation as a cavitation parameter. Comparison of the tip cavity length in liquid nitrogen (80 K) with that in cold water (296 K) allowed us to estimate the strength of the thermodynamic effect. The degree of thermodynamic effect was found to increase with an increase of the cavity length. The estimated temperature depression caused by vaporization increased rapidly when the cavity length extended over the throat. In addition, the estimated temperature inside the bubble nearly reached the temperature of the triple point when the pump performance deteriorated.
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U2 - 10.1115/FEDSM2005-77430
DO - 10.1115/FEDSM2005-77430
M3 - Conference contribution
AN - SCOPUS:33646537808
SN - 0791837602
SN - 9780791837603
T3 - Proceedings of 2005 ASME Fluids Engineering Division Summer Meeting, FEDSM2005
SP - 2289
EP - 2294
BT - Proceedings of 2005 ASME Fluids Engineering Division Summer Meeting, FEDSM2005
T2 - 2005 ASME Fluids Engineering Division Summer Meeting, FEDSM2005
Y2 - 19 June 2005 through 23 June 2005
ER -