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 - 2005/12/19
Y1 - 2005/12/19
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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M3 - Conference contribution
AN - SCOPUS:28844472459
SN - 0791841987
SN - 9780791841983
T3 - Proceedings of the American Society of Mechanical Engineers Fluids Engineering Division Summer Conference
SP - 591
EP - 596
BT - Proceedings of ASME Fluids Engineering Division Summer Conference, 2005 Forums, FEDSM2005
T2 - 2005 ASME Fluids Engineering Division Summer Conference
Y2 - 19 June 2005 through 23 June 2005
ER -