서지주요정보
축대칭 코안다 제트에 대한 실험적 고찰 = An experimental investigation of the axisymmetric coanda jet
서명 / 저자 축대칭 코안다 제트에 대한 실험적 고찰 = An experimental investigation of the axisymmetric coanda jet / 김유곤.
저자명 김유곤 ; Kim, You-Gon
발행사항 [서울 : 한국과학기술원, 1982].
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소장정보

등록번호

4101900

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 8233

SMS전송

도서상태

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초록정보

When a coaxial thin wall jet flows over a sphere, it deflects along the backward surface of the sphere to collide itself at about the rearward center. Intensive mixing process takes place within the colliding region and then a new kind of axisymmetric jet developes. This phenomenon is named as the axisymmetric Coanda jet in this study. Mean velocity, turbulence intensity, Reynolds stress and correlation coefficient have been measured in the Coanda jet region by using two-component, polarization Laser Doppler Velocimetry. The development of the axisymmetric Coanda jet has been found to be determined primarily by the initial Reynolds number at the nozzle exit defined by $\frac{Ue\sqrt{2hD}}{\nu}$. It appears that the separation point on the sphere exists at about 60 degrees from the nozzle exit which is independent of initial conditions. The axial size of the bubble becomes smaller for the smaller Reynolds number. Compared with a simple axisymmetric jet, the spreading rate of the half velocity jet width is about 1.35 times larger, and the axial mean velocity is reduced more slowly along the center line at a rate of $(X-Xo)^{-0.88}$. When the radial gradient of the radial mean velocity is fairly great, the Reynolds stress is proportional to the multiplication of the radial gradients of the radial and axial mean velocities. However, when it is negligible, the Reynolds stress is proportional only to the radial gradient of the axial mean velocity.

서지기타정보

서지기타정보
청구기호 {MME 8233
형태사항 [v], 94, 2 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : You-Gon Kim
지도교수의 한글표기 : 정명균
지도교수의 영문표기 : Myung-Kyoon Chung
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학과,
서지주기 참고문헌 : p. 32-34
주제 Coanda effect.
Jets --Fluid dynamics.
Mixing.
Jet nozzles.
Reynolds stress.
Coanda 효과. --과학기술용어시소러스
레이놀즈 응력. --과학기술용어시소러스
사류 (분류) --과학기술용어시소러스
노즐. --과학기술용어시소러스
유동 해석. --과학기술용어시소러스
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