The objective of this paper is to evaluate the predictive capability of three turbulence models for the simulation of unsteady cavitating flows around a 2D Clark-y hydrofoil. Three turbulence models were standard k-ε model, hybrid model of density correction model (DCM) and filter-based model (FBM) and an improved partially-averaged Navier-Stokes model (PANS) based on k-ε model. Using the above...

A model of a submerged angular cavitation nozzle is established, which consists contraction part, parallel middle and expansion part. Based on the CFD technique, numerical simulation flow field carried out, in multiphase mixture model, renormalization group (RNG) k-ε turbulence are applied. Considering influence density cavitation, effects inlet outlet part velocity vapor volume fraction studie...

The paper deals with the flow of oil through an experimental hydraulic circuit a convergent divergent nozzle circular cross-section. Under different physical conditions, i.e. changes in pressure, and temperature, formation development cavitation is monitored. As it highly dynamic transparent nozzle, monitored using high-speed camera frequency dissolution bubble movement cloud then determined. a...

Cloud cavitation causes nontrivial energy concentration and acoustic shielding in liquid its control is a long-standing challenge due to complex dynamics of bubble clouds. We present framework study closed-loop through feedback. While previous approaches have used empirical thresholding, we employ model-based state estimation coherent based on theory high-performance computing. Using pulsed ult...

Intense Na* emission was observed from 0.1 M Na(2)SO(4) in 95% sulfuric acid during multibubble sonoluminescence (MBSL). As a function of acoustic intensity, three different morphologies are observed for the cloud of light emitting bubbles. Even more strikingly, there is a spatial separation between blue-white emitting bubbles and orange emitting bubbles, easily observed by the naked eye. Surpr...

The S-shaped hydrofoil is often used in the design of reversible machinery due to its centrally symmetrical camber line. objective this paper study influence cloud cavitation on flow structure and unsteady characteristics lift drag around an via experimental tests numerical simulations. In component, were carried out a tunnel high-speed camera was record details with different numbers. results ...