Abstract
For an elliptic Arndt's hydrofoil numerical simulations of vortex cavitation are presented. An equilibrium cavitation model is employed. This single-fluid model assumes local thermodynamic and mechanical equilibrium in the mixture region of the flow, is employed. Furthermore, for characterizing the thermodynamic state of the system, precomputed multiphase thermodynamic tables containing data for the appropriate equations of state for each of the phases are used and a fast, accurate, and efficient look-up approach is employed for interpolating the data. The numerical simulations are carried out using the Unsteady Reynolds-Averaged Navier-Stokes (URANS) equations for compressible flow. The URANS equations of motion are discretized using an finite volume method for unstructured grids. The numerical simulations clearly show the formation of the tip vortex cavitation in the flow about the elliptic hydrofoil.
Highlights
In most practical situations, cavitation can and typically does occur when the local static pressure of a liquid drops below the saturation pressure
The numerical simulations are performed by using the compressible flow Unsteady Reynolds-Averaged Navier-Stokes (URANS) equations which are closed with the thermodynamic state relations based on the employed equilibrium cavitation model
12.5 293 998.7 1540.0 1.0 the numerical simulations must be taken very small. This is because the equilibrium cavitation model takes into account the physics of both the incompressible and compressible flows, which are solved using the compressible flow approach
Summary
Cavitation can and typically does occur when the local static pressure of a liquid drops below the saturation pressure. The equilibrium cavitation model [1], [2], [3] is employed, which in the two-phase flow region assumes local thermodynamic and mechanical equilibrium. Note that in this model the phase transition does not depend on empirical constants, and a cavitation threshold at p = psat is assumed. The computational method assumes Tait’s equation of state for the liquid phase, perfect gas for the vapor phase, and an equilibrium model for the mixture phase (see e.g. Schmidt et al [3] and Koop [4]).
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
