Focusing on cavitation phenomena caused by high-speed submerged water jets, this paper presents an improved model for a compressible fluid mixture based concise estimation of compressibility that considers phase change effects. The homogeneous two-phase flow assumption is adopted, and the gas assumed to consist vapor non-condensable components. Equations state pure liquid ideal are employed eva...

one of the most problems that limits use of turbomachines at high speed applications is cavitation. cavitation can damage casing and blades of turbopump, also can make unstability in system. inducer that was installed in front of main impeller can improve cavitation characteristic of system and increase static pressure just before entrance of centrifugal pump. specially in fuel feed system of l...

In this work, we experimentally investigated the cavitation effects on hydrodynamic behavior of a circular cylinder at different cavitating flows. We analyzed dynamics behind using high-speed camera and also measured associated forces load cell. studied around various types regimes such as cloud cavitation, partial inception. addition, three Reynolds numbers: 1 × 105, 1.25 105 1.5 105. The resu...

The influence of a bulb runner blade hydrofoil shape on flow characteristics around the was studied. Experimental work performed turbine measuring station and single in cavitating tunnel. In cavitation tunnel, visualization hydrofoil’s suction side. Cavitation structures were observed for several numbers. less intense modified than original hydrofoil, delaying onset by tenths number. results tu...

This paper is concerned with the flow of a bubbly fluid along a wavy wall, which is one Fourier component of a linearized hydrofoil. The bubbles are dispersed, not throughout the whole of the liquid, but only over a certain distance from the wall, as occurs in practice with cavitation bubbles. Outside the bubbly regime there is pure liquid. The interface between the bubbly fluid and pure liquid...

Striking the top of a liquid-filled bottle can shatter the bottom. An intuitive interpretation of this event might label an impulsive force as the culprit in this fracturing phenomenon. However, high-speed photography reveals the formation and collapse of tiny bubbles near the bottom before fracture. This observation indicates that the damaging phenomenon of cavitation is at fault. Cavitation i...