메뉴 건너뛰기
.. 내서재 .. 알림
소속 기관/학교 인증
인증하면 논문, 학술자료 등을  무료로 열람할 수 있어요.
한국대학교, 누리자동차, 시립도서관 등 나의 기관을 확인해보세요
(국내 대학 90% 이상 구독 중)
로그인 회원가입 고객센터 ENG
주제분류

추천
검색
질문

논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국자동차공학회 오토저널 자동차공학회지 제2권 제1호
발행연도
1980.7
수록면
21 - 31 (11page)

이용수

표지
📌
연구주제
📖
연구배경
🔬
연구방법
🏆
연구결과
AI에게 요청하기
추천
검색
질문

초록· 키워드

오류제보하기
Two phase boundary layer equations of laminar filmwise condensation are solved by an app-roximate integral method under the following condition; saturated vapour flows vertically down- ward over a cooled surface of uniform temperature, the condensate film is so thin that the inertia and convection terms. are neglect ed.
The following conclusions are drawn under the above assumptions.
1. free convection
In case of the linear temperature profile in a liquid film, numerical results for the average coefficients of heat transfer may be expressed as Nμm-4/3. (Gr₂/4.H)^¼ and in case of the quadratic profile, numerical results may be expressed as Nμm-2/1.682.(Gr₂/4.H)^¼.
2. Forced convection
When the temperature profile is assumed to be linear in a liquid film, numerical results fir the average heat transfer coefficients may be expressed as Num-(A, Re₂/H)^½. This express- ion is compared with the experimental results hitherto reported;
For theoritical Nusselt number (Nμm)_ch< 2 X 10⁴, the experimental Nusselt number (Num)_exp
is on the average larger than theoritical Nusselt number (Nμm)_ch) by 30%.
For (Nμm)_ch>2X10⁴, experimental Nusselt number (Num)_exp is about 1.6 times as large as theoritical Nusselt number (Nμm)_ch. These large deviation may be caused by the presence of turbulence in the liquid film.
In case of the quadratic temperature profile in a liquid film, numerical resul ts
for the average coefficients of heat transfer may be expressed as Num - (2.A.Re/H)^½. This formular shows that theoritical Nusselt number (Num)_ch is larger than experimental Nusselt number (Num)_exp by 60%.
It is speculated that when the temperature difference between cooled surface and saturated vapour is small, temperature profile in a liquid film is quadratic.

목차

Abstract

1.序論

2.基本 方程式(Basic equations)

3.數値 解析(Numerical analysis)

4.數値結果 및 檢討(Numerical results and Discussion)

結論

記號說明

REFERENCE

참고문헌 (0)

참고문헌 신청

함께 읽어보면 좋을 논문

논문 유사도에 따라 DBpia 가 추천하는 논문입니다. 함께 보면 좋을 연관 논문을 확인해보세요!

이 논문의 저자 정보

최근 본 자료

전체보기

댓글(0)

0

UCI(KEPA) : I410-ECN-0101-2009-556-014071074