The Research on Boundary Element Method of Cavitation Characteristics of Two-Dimensional Hydrofoil

Cavitation occurrence, growth and collapse often lead to great instability of flow field structure, which usually brings about cavitation, vibration and noise hazards to hydraulic machinery such as marine propeller, rudder and turbine. Therefore, the relevant cavitation characteristics are of great engineering significance. In order to study the cavitation characteristics of two-dimensional hydrofoil, a two-dimensional hydrofoil cavitation calculation program based on potential flow theory is established in this paper. In this paper, the basic principle of boundary element method is firstly elaborated, and the closure condition of cavitation is emphatically introduced. On this basis, the influence mechanism of cavitation number and angle of attack on the cavitation characteristics of two-dimensional hydrofoil is discussed. The results show that the cavitation phenomenon of two-dimensional hydrofoil is positively correlated with the number and angle of attack of the cavity, i.e. with the increase of the number and angle of attack of the cavity, the volume of the cavity increases, which is in good agreement with the experimental results.