TY - JOUR
T1 - Experimental and numerical analysis of tip leakage cavitating flow around a 3D NACA66 (mod) hydrofoil
AU - Zhao, Xiaoyang
AU - Zhao, Yu
AU - Wu, Qin
AU - Huang, Biao
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/12/1
Y1 - 2021/12/1
N2 - Combined experimental and numerical methods, the objective of this paper is to investigate the characteristics of the cavitating flow around a 3D NACA66 (mod) hydrofoil, especially for the tip leakage cavitating flow. The cavitating flow is divided into three patterns: (I) mainstream cavity (MC); (II) mainstream cavity and tip leakage vortex cavity (MC&TLVC); (III) mainstream cavity, tip leakage vortex cavity and film bridge cavity (MC&TLVC&FBC). The changing laws of the three patterns are related to the attack angle α and cavitation number σ. The LES turbulence model and Schnerr-Sauer cavitation model are implemented in the numerical simulations, whose results show good agreement with the experimental data. For the typical condition of α = 8°, V∞ = 10 m/s, σ = 1.5, the characteristic frequencies of TLVC and FBC are 35 Hz and 37 Hz, respectively, which are very close to the shedding frequency of MC (36 Hz). By analyzing a typical shedding cycle, the mainstream is proved to have a decisive influence on the tip leakage cavitating flow.
AB - Combined experimental and numerical methods, the objective of this paper is to investigate the characteristics of the cavitating flow around a 3D NACA66 (mod) hydrofoil, especially for the tip leakage cavitating flow. The cavitating flow is divided into three patterns: (I) mainstream cavity (MC); (II) mainstream cavity and tip leakage vortex cavity (MC&TLVC); (III) mainstream cavity, tip leakage vortex cavity and film bridge cavity (MC&TLVC&FBC). The changing laws of the three patterns are related to the attack angle α and cavitation number σ. The LES turbulence model and Schnerr-Sauer cavitation model are implemented in the numerical simulations, whose results show good agreement with the experimental data. For the typical condition of α = 8°, V∞ = 10 m/s, σ = 1.5, the characteristic frequencies of TLVC and FBC are 35 Hz and 37 Hz, respectively, which are very close to the shedding frequency of MC (36 Hz). By analyzing a typical shedding cycle, the mainstream is proved to have a decisive influence on the tip leakage cavitating flow.
KW - Film bridge cavity (FBC)
KW - Mainstream cavity (MC)
KW - Tip leakage cavitating flow
KW - Tip leakage vortex cavity (TLVC)
UR - http://www.scopus.com/inward/record.url?scp=85118507672&partnerID=8YFLogxK
U2 - 10.1016/j.oceaneng.2021.110005
DO - 10.1016/j.oceaneng.2021.110005
M3 - Article
AN - SCOPUS:85118507672
SN - 0029-8018
VL - 241
JO - Ocean Engineering
JF - Ocean Engineering
M1 - 110005
ER -