飛跡解析に基づく舶用過給機ラジアルタービン内の粒子挙動評価

抄録

In the radial turbine used for marine turbocharger, the collision of combustion residue particle contained in engine exhaust gas causes turbine blades erosion. However, there are many unclear points in the flow mechanism. In this paper, we evaluate the particle behaviour in the radial turbine based on lagrangian particle tracking method. As a result, the possibility of explaining the turbine erosion phenomenon by the particle adhesion rate of each part was obtained. At the leading edge of the turbine blade, the impact of particles with large inertia which are difficult to follow the air flow was found to be the cause of erosion, and it was confirmed that turbine design including particle behaviour was possible.