서지주요정보
회전하는 파동형상의 원판을 지닌 실린더 안에서의 유동 = Flow in a cylinder with a rotating wavy endwall disk
서명 / 저자 회전하는 파동형상의 원판을 지닌 실린더 안에서의 유동 = Flow in a cylinder with a rotating wavy endwall disk / 윤명섭.
저자명 윤명섭 ; Yoon, Myung-Sup
발행사항 [대전 : 한국과학기술원, 2002].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8012787

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 02044

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

A numerical study is made of a flow in a cylinder with a rotating wavy endwall disk. The aim is to describe differences in the flow fields when there is sinusoidal wavy obstacle characterized by amplitude(a) and wave number(N). The Ekman number(Ek) is set to $10^{-4}$ and the aspect ratio(R/H) fixed to 1. For 40 combinations of amplitude(a) and wave number(N),numerical results are acquired. As endwall disk roughness(aN) increases, the azimuthal velocity component(v) increases drastically. Also, the Primary volume flow rate($Q_p$) does. The reason of activating θ directional flow is based on increasing of torque(T) transported by endwall disk as roughness(aN) increases. The torque coefficients($C_T$) vary linearly as endwall disk roughness has lager value. The torque coefficients($C_T$) are determined by normal azimuthal velocity gradients(dv/dn) and surface area elements(ds). As roughness increases, surface area elements(ds) help to increase torque(T), but velocity gradients(dv/dn) do not. Synthetically, torque increases by surface area increasing effect and it causes activation of swirling motions in a cylinder.

서지기타정보

서지기타정보
청구기호 {MME 02044
형태사항 iv, 37 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Myung-Sup Yoon
지도교수의 한글표기 : 현재민
지도교수의 영문표기 : Jae-Min Hyun
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학전공,
서지주기 참고문헌 수록
주제 회전유동
원통
요철
요철바닥면
토크
rotating flow
cylinder
wavy bottom
sinusoidal wavy bottom
torque
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