Control of Flow Separation from Automobile Front Bumper Model by Plasma Actuator

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  • プラズマアクチュエータを用いた自動車フロントバンパモデルのはく離流れ制御

Abstract

<p>Control of flow separation on a vehicle front bumper model using a string-type dielectric barrier discharge plasma actuator (DBD-PA) was performed experimentally at Re = 56,000. The front bumper model composed of a side flat plate and a quarter cylinder with diameter of 169 mm was set up at 200 mm downstream from the exit of blowing-type wind tunnel. It was fixed with an aerodynamic sideslip angle of 10 degrees with respect to the main flow direction. Suction and blowing jets were induced in upstream of flow separation by the string-array type PAs. In x/R = 0.5 cross section, it was clarified that the displacement thickness was reduced by 47% by PA under the suction control in comparison with that under the blowing control, and suction jet had a higher control effect of flow separation than blowing one.</p>

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