프로펠러와 허브 보오텍스 감소장치 상호작용 CFD 해석

Abstract

Lots of researchers have been trying to increase the hull propeller’s propulsion efficiency. In this study, was carried out the numerical analysis for PHVC (Propeller HUB Vortex Control) to POW(Propeller Open Water) performance in uniform flow with the commercial software called STAR-CCM+. PHVC is a hub vortex control device attached to the propeller and it acts to restore the kinematic energy. Supposed that flow field which is around the propeller was completely developed turbulence flows. Used RANS(Reynolds &#8211 averaged Navier &#8211 Stokes) equation as governing equations and k-ω SST model was selected to describe turbulence and RBM(Rigid Body Motion) method was selected to analyze with unsteady flow. The characteristic values, KT, KQ and ηO of the target propeller according to attach the PHVC was computed, and confirm that values. For this interaction, PHVC has influenced on the propeller and it shows that increase the propeller’s propulsion efficiency come into PHVC. Also, inactive thrust and decrease the torque value at PHVC. The results of numerical analysis for PHVC is compared with experimental values about the POW test and propeller downstream velocity by using the LDV(Laser Doppler velocimeter) from a model test at the KRISO LCT(Large Cavitation Tunnel). And establish the possibility to use this result when analyzed PHVC design step for propulsion efficiency.flow with the commercial software called STAR-CCM+. PHVC is a hub vortex control device attached to the propeller and it acts to restore the kinematic energy. Supposed that flow field which is around the propeller was completely developed turbulence flows. Used RANS(Reynolds &#8211 averaged Navier &#8211 Stokes) equation as governing equations and k-ω SST model was selected to describe turbulence and RBM(Rigid Body Motion) method was selected to analyze with unsteady flow. The characteristic values, KT, KQ and ηO of the target propeller according to attach the PHVC was computed, and confirm that values. For this interaction, PHVC has influenced on the propeller and it shows that increase the propeller’s propulsion efficiency come into PHVC. Also, inactive thrust and decrease the torque value at PHVC. The results of numerical analysis for PHVC is compared with experimental values about the POW test and propeller downstream velocity by using the LDV(Laser Doppler velocimeter) from a model test at the KRISO LCT(Large Cavitation Tunnel). And establish the possibility to use this result when analyzed PHVC design step for propulsion efficiency.