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양수영(Soo-Young YANG),이동훈(Dong-Hoon LEE),김희동(Heuy-Dong KIM),瀨戶口俊明(Toshiaki SETOGUCHI) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
A helical vane is applied to reduce the magnitude of the impulse wave discharged from the exit of a duct. A shock<br/> tube with an open end is used to investigate the effect of the helical vanes on the impulse wave magnitude. Four<br/> different types of helical vanes are installed into the low-pressure tube of shock tube. The magnitude of the<br/> incident shock wave is varied below 1.25, and the magnitude of impulse wave is measured using a pressure<br/> transducer mounted on a wedge probe. Instant images of the impulse wave are obtained by means of the Schlieren<br/> optical method. The present experimental results show that the helical vane considerably reduces the magnitude of<br/> the impulse wave and the vane effects are more remarkable for stronger incident shock wave.