후향계단이 있는 사각덕트 내부의 유동특성 연구

• 영문명: A study of backward-facing step flow in a rectangular duct
• 발행기관: 강원대학교 산업기술연구소
• 저자명: 김성준(Kim Sung Joon) 최병대(Choi Byung Dae)
• 간행물 정보: 『산업기술연구』vol.19, 1~7쪽, 전체 7쪽
• 주제분류: 공학 > 공학일반
• 파일형태: PDF
• 발행일자: 1999.09.30

영문 초록

This study is to analyze turbulent flow over a backward-facing step in a rectangular duct. The side wall effects on the internal flow were determined by varying the aspect ratio(defined as the step span-to-height ratio) from 1 to 20. In the flow behind a backward-facing step, separation, recirculation and redeveloping is occurred frequently. These phenomena appear in a particular variation by varying the aspect ratio. The results show that the aspect ratio has an influence on the velocity and reattachment length. When the AR is increased, the reattachment length is increased. For 6 over aspect ratio, the rate of increase is decreased. The length of recirculation in the upper corner is increased, as the increase of aspect ratio. It’s width is not changed in the variation of aspect ratio. The transverse, streamwise and spanwise velocities were decreased along the flow down stream of the step.

목차

Abstract

1. 서론

2. 지배방정식

3. 수치해석

4. 결론

참고문헌

키워드

후향스텝유동 재접속 길이 재순환 박리 종횡비 Backward facing step flow Reattachment length Recirculation Separation AR