Thermodynamic effect on a cavitating inducer in liquid nitrogen

Yoshiki Yoshida, Mitsuru Shimagaki, Kengo Kikuta, Noriaki Nakamura, Satoshi Hasegawa, Takashi Tokumasu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationProceedings of ASME Fluids Engineering Division Summer Conference, 2005 Forums, FEDSM2005
Pages591-596
Number of pages6
Publication statusPublished - 2005 Dec 19
Event2005 ASME Fluids Engineering Division Summer Conference - Houston, TX, United States
Duration: 2005 Jun 192005 Jun 23

Publication series

NameProceedings of the American Society of Mechanical Engineers Fluids Engineering Division Summer Conference
Volume2

Other

Other2005 ASME Fluids Engineering Division Summer Conference
Country/TerritoryUnited States
CityHouston, TX
Period05/6/1905/6/23

ASJC Scopus subject areas

  • Engineering(all)

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