TY - JOUR
TI - Comparison of vortex and cavitation characteristics of hydraulic machinery in translational and rotational domains
AU - Zang Jianbo
AU - Zhang Hu
AU - Wang Jun
AU - Zhang Desheng
AU - An Fang
AU - Cheng Kun
JN - Thermal Science
PY - 2025
VL - 29
IS - 5
SP - 3775
EP - 3789
PT - Article
AB - To investigate the differences and similarities in vortex and cavity characteristics between translational and rotational domain hydraulic machines, the NACA0009 hydrofoil and a self-designed impeller blade were selected as representative cases in the translational and rotational domains. The STAR-CCM+ software was utilized to simulate the multi-phase flow, and the experimental results of NACA0009 hydrofoil from EPFL were employed to validate the accuracy of the simulation. The following conclusions were drawn from the analysis of the simulation results: Firstly, both types of hydraulic machinery generate similar vortex types, including the tip leakage vortex, tip separation vortex, and secondary tip leakage vortex. However, each type also exhibits unique vortices, such as the perpendicular vortex in the translational domain and the trailing edge vortex in the rotational domain. Secondly, the tip leakage vortex is initially weak but continuously absorbs other vortices, thereby strengthening itself as it develops. Additionally, the blades in the rotational domain must achieve a higher speed to produce the same level of cavitation as those in the translational domain. Finally, the attached cavitation on the blade surface is repelled by the spin of the tip leakage vortex, which cannot promote the generation of tip leakage vortex cavitation. The primary source of tip leakage vortex cavitation is the tip separation vortex cavitation. The strengths of cavitation and vortices differ between the rotational and translational domains, leading to varying effects on the equipment.
DO - 10.2298/TSCI240714030Z
ER -