表面渦格子法を用いたプロペラ非定常特性解析

概要

論文の詳細を見る
In this paper, the applications of surface vortex lattice method to marine propellers in non-uniform flow are considered. The surface vortex lattice method based on the general vortex lattice method is possible to simulate the flow around a lifting body including thickness and volume effects by distributing horse-shoe vortices and surface source distributions on the both side surfaces of the blades. The advantage of this method compared to other panel methods is the fact that the Kutta-condition is satisfied automatically in not only steady condition but also unsteady condition by convecting the trailing and the shed vortices. The geometry of the wake using the linear wake model having the geometrical pitch of blades and all shed vortices are convected to new positions step by step with a small time interval. Three propllers are used to confirm the accuracy of the results of the present method. At first, the fluctuation of the thrust and the torque coefficients of a propeller in harmonic wake are calculated to compare the time derivative term with the results by VLM. And next, the pressure distribution on the blade concerning to two full scale propellers are calculated by the present method. The results of these calculations are good agreements with experimental results and other theoretical calculations
社団法人日本船舶海洋工学会の論文