대형공동수조를 활용한 복합재료 프로펠러의 추진 성능 및 공동 성능 시험법에 대한 연구

Abstract

Unlike traditional metallic marine propellers, which primarily consider hydrodynamic scaling, composite propellers require consideration of hydro-elastic scaling, accounting for both hydrodynamic forces and the deformation of the propeller blades. Model tests using by Mach number scaling, which must be performed at the same flow velocity of full-scale propellers, for hydro-elastic scaling of the composite propeller is conducted at the large cavitation tunnel (LCT). The deformation and performance of the composite propellers is influenced by flow velocity, necessitating tests under different velocities. This study presents the results of propeller open-water tests conducted across a range of velocities to assess the effect of the velocity on the propeller open-water characteristics. Additionally, a self-propulsion test of the composite propeller is conducted in the LCT. Based on the results, new prediction methods are proposed to estimate the full-scale performance of the composite propeller, and then applied to predict the full-scale performance of the composite propeller in comparison with that of the metallic propeller. This study also introduces a cavitation test method of the composite propeller based on the Mach number scaling. Using this method, the cavitation test is conducted to evaluate the cavitation performance of the composite propellers. Future work will focus on validating the proposed test method by comparing and analyzing the measured data of full-scale.