Twisted Tape가 설치된 사각 덕트에서 스월유동 및 코너효과가 미치는 열전달 성능

• 영문명: Heat Transfer Performance of Swirl Flow and Corner Effect Generated by Twisted Tape in a Square Duct
• 발행기관: 한국항해항만학회
• 저자명: 강호근(Ho-Keun Kang) B.K.P Ary, 안수환(Soo-Whan Ahn) 최종웅(Jong-Woong Choi)
• 간행물 정보: 『한국항해항만학회 학술대회논문집』2008년도 공동학술대회 지구환경변화와 해양산업의 전망 논문집, 63~64쪽, 전체 2쪽
• 주제분류: 공학 > 해양공학
• 파일형태: PDF
• 발행일자: 2008.06.30

영문 초록

This paper presents numerical and experimental predictions of characteristics of turbulent flow, heat transfer and friction factors in a square sectioned duct (30 × 30mm) with twisted tape inserts and with twisted tape inserts plus rib tubulators. Turbulent swirl flows having Reynolds numbers ranging from 8,900 to 29,000, a rib height-to-channel hydraulic diameter (e/D_h) of 0.067, and a length-to hydraulic diameter (L/D_h) of 30, are considered. The rib tubulators are arranged to follow the trace of the twisted tape and along the flow direction. The twisted tape is 0.1mm thick carbon steel sheet with diameter of 28mm, length of 900mm, and 2.5 turns. Each wall is composed of isolated aluminum sections. Two heating conditions are applied for four side walls and two opposite walls. The correlation for friction factor and Nusselt number are derived from the predicted data. The results show that uneven surface heating enhances the heat transfer coefficient over uniform heating condition, and significant improvements can be achieved with twisted tape inserts plus interrupted ribs.

목차

Abstract

1. 서론

2. 연구방법

3. 결과 및 고찰

4. 결론

참고문헌

키워드

열전달 사각덕트 스월 유동 꼬임식 테이프 Heat transfer Square duct Swirl flow Twisted tape