Calculation of Three-dimensional Unsteady Sheet Cavitation by a Simple Suraface Panel Method “sqcm”
نویسندگان
چکیده
This paper presents a calculation method for the 3-D unsteady cavitating hydrofoil problem. The method is based on a simple surface panel method “SQCM” which satisfies easily the Kutta condition even in the unsteady problem. This method is applied to the Wagner problem, heaving hydrofoil and the hydrofoil in sinusoidal gust. We show some calculated results for partially cavitating and supercavitating hydrofoil and compare them with other calculated results.
منابع مشابه
A Boundary Element Method for the Computation of Unsteady Sheet Cavitation Effects in Marine Propeller Flows
This paper focuses on the modelling and simulation of unsteady sheet cavitation in marine propeller flows. In the first part of the paper, the mathematical model based on potential flow theory is introduced and the numerical scheme is derived. The novelty of the presented calculation method refers to the unsteady partial sheet cavitation model which has been implemented into the in-house panel ...
متن کاملSimulation of Premixed Combustion Flow around Circular Cylinder using Hybrid Random Vortex
This research describes the unsteady two-dimensional reacting flows around a circular cylinder. The numerical solution combines the random vortex method for incompressible two-dimensional viscous fluid flow with a Simple Line Interface Calculation (SLIC) algorithm for the propagation of flame interface. To simplify the governing equations, two fundamental assumptions namely Low Mach Number and ...
متن کاملTheoretical Analysis of Unsteady Blade Loading of Inducers under Rotating Cavitation
Rotating cavitation is one of the flow instabilities associated with cavitation, which has been a problem for the development of turbopumps of liquid rocket engines since it causes super-synchronous shaft vibration. Recently, it is argued that rotating cavitation might also cause large repetitive stresses on blades. This paper describes about the theoretical prediction of unsteady blade forces ...
متن کاملThree-Dimensional Boundary Layer Flow and Heat Transfer of a Dusty Fluid Towards a Stretching Sheet with Convective Boundary Conditions
The steady three-dimensional boundary layer flow and heat transfer of a dusty fluid towards a stretching sheet with convective boundary conditions is investigated by using similarity solution approach. The free stream along z-direction impinges on the stretching sheet to produce a flow with different velocity components. The governing equations are reduced into ordinary differential equations b...
متن کاملTip Leakage Vortex Cavitation from the Tip Clearance of a Single Hydrofoil
Focusing on the tip leakage vortex cavitation, experimental and numerical studies were carried out as the first step of the investigation of cavitations in tip leakage flow. For a single hydrofoil with a tip clearance, tip leakage vortex cavitations were observed for various cavitation numbers and angles of attack. To simulate the tip leakage vortex cavitation, a simple calculation of 2-D unste...
متن کامل