TY - JOUR
T1 - Thermodynamic effect of tip-leakage-vortex cavitation on two-dimensional hydrofoils with tip clearance for hot water
AU - Kang, Donghyuk
AU - Nakai, Daichi
AU - Iga, Yuka
N1 - Funding Information:
A part of this research was performed under the Collaborative Research Project of the Institute of Fluid Science, Tohoku University, Japan.
Publisher Copyright:
© 2019, Turbomachinery Society of Japan. All rights reserved.
PY - 2019/10/1
Y1 - 2019/10/1
N2 - Investigation of the thermodynamic effect of tip-leakage-vortex cavitation on a two-dimensional hydrofoil designed with a tip clearance for hot water is reported herein. During unsteady cavitation of water maintained at 90 °C (hereinafter referred to as hot water), the observed decrease in temperature in the tip-leakage region was greater compared to that in the mid-span region. In contrast, during supercavitation of hot water, the situation was reversed (i.e., the temperature decrease in the tip-leakage region was smaller than that in the mid-span region). The cavitation-pattern map for hot water was observed to be largely similar to that for water maintained at 30 °C (hereinafter referred to as tepid water). On the other hand, the amplitude of the dominant frequencies of unsteady cavitation of the hot water was observed to be greater than that of the cavitation of tepid water owing to the sudden collapse of cloud cavitation.
AB - Investigation of the thermodynamic effect of tip-leakage-vortex cavitation on a two-dimensional hydrofoil designed with a tip clearance for hot water is reported herein. During unsteady cavitation of water maintained at 90 °C (hereinafter referred to as hot water), the observed decrease in temperature in the tip-leakage region was greater compared to that in the mid-span region. In contrast, during supercavitation of hot water, the situation was reversed (i.e., the temperature decrease in the tip-leakage region was smaller than that in the mid-span region). The cavitation-pattern map for hot water was observed to be largely similar to that for water maintained at 30 °C (hereinafter referred to as tepid water). On the other hand, the amplitude of the dominant frequencies of unsteady cavitation of the hot water was observed to be greater than that of the cavitation of tepid water owing to the sudden collapse of cloud cavitation.
KW - Hot water
KW - Temperature depression
KW - Thermodynamic effect
KW - Tip-leakage-vortex cavitation
KW - Unsteady cavitation
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U2 - 10.5293/IJFMS.2019.12.4.368
DO - 10.5293/IJFMS.2019.12.4.368
M3 - Article
AN - SCOPUS:85077454454
VL - 12
SP - 368
EP - 379
JO - International Journal of Fluid Machinery and Systems
JF - International Journal of Fluid Machinery and Systems
SN - 1882-9554
IS - 4
ER -