Experimental Study on the Snowfall Flow Control of Backward-Facing Steps Using a High-Durability Designed Plasma Electrode

Using a high-durability designed plasma electrode (PA), the actuation effect on both two-dimensional backward-facing step flow (standard model) and an arc-shaped three-dimensional (arc was investigated experimentally. First, we searched for operation control conditions suitable by carrying out experiments using medium-sized circulating wind tunnel. Next, natural-snow tunnel of Hokkaido University Science, examined whether AC-driven PA can snowfall flow. It became clear first time that amount snow accumulation be reduced more than 20% when is driven at dimensionless frequency fH/U = 0.32, where f pulsed modulation frequency, H height, U mainstream velocity, duty ratio D (the PA_ON to total controlled frequency) equal 1.0%. also confirmed masking parallel only part perpendicular electrode, accumulated could up 20%. has become electrodes reduce snow.