This experimental study was investigated the flow characteristics around staggered cooling tube arrays. A particle image velocimetry technique was employed to obtain detailed measurements at inlet-velocity-based three Reynolds numbers and the frequency characteristics of the wake were analyzed by using spectral analysis of the measured wake velocity signals. As a results, the flow exhibits strong Reynolds number dependence in the developing region but no significant Reynolds number effects are observed in the spatially periodic region.

Abstract
 1. 서론
 2. 실험장치 및 방법
 3. 결과 및 고찰
 4. 결론
 참고문헌

• 조대환(목포해양대학교 기관시스템공학부) | Dae-Hwan Cho 교신저자
• 최주열(목포해양대학교 기관시스템공학부) | Joo-yol Choi
• 이철재(동명대학교 자동차공학과) | Cheol-Jae Lee