Numerical Investigation of Effects of Rectangular Structure on Cavitation Evolution Around NACA0015 Hydrofoil

Abstract

A combination of an improved SST k-ω turbulence model with Zwart-Gerber-Belamri cavitation model was employed to perform the numerical simulation of cavitation flow around general NACA0015 hydrofoil and the hydrofoil with rectangular structure on the surface. Effects of the rectangular structure on cavitation evolution were determined. Cavitation bubble evolution process and distribution of streamlines were investigated. Results clearly indicated that average lift-drag ratio of the hydrofoil with rectangular structure on the surface increased by 15.98%. Cavitation bubbles decreased and the distribution scopes of vortices reduced significantly. Cavitation evolution was effectively suppressed.

Numerical investigation of cavitation suppression of centrifugal pump based on the bionic humpback whale blade

“…At present, the optimization method is mainly by changing the geometric parameters of the blade, such as change the blade thickness, inlet diameter, etc [4,5,6], some people achieve cavitation suppression by changing the blade geometry [7]. Wang et al [8] studied the bionic special configuration of airfoil surface to achieve the purpose of suppressing cavitation, and the flow field became more stable. Dai et al [9] studied the influence of the position of the obstacles on the cavitation performance of the centrifugal pump, when the obstacles are placed at the inlet 1/3 of the vane working face, the cavitation performance of the centrifugal pump is obviously improved.…”