PIV計測による気管支内流れの検討

抄録

Flow structure in human bronchus is experimentally investigated by PIV measurement. To simulate non-uniform inlet flow from larynx including Dean vortices, a bent pipe is connected upstream of the bronchus model. Dean number was changed by the radius of curvature of the bent pipe. In branch region and curved region of the bronchus model, velocity distributions that indicate adverse pressure gradient condition and separated flows are confirmed. Dean vortices uniformize velocity distribution in the bronchus model. Strong Dean vortices may restrict flow separation in the adverse pressure gradient region. This trend is remarkably observed in higher Dean number condition.