대한기계학회논문집 (Transactions of the Korean Society of Mechanical Engineers)
- 제16권6호
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- Pages.1156-1162
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- 1992
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- 1225-5963(pISSN)
DOI QR Code
종횡비에 따른 타원제트의 유동특성에 관한 실험적 연구
The Effect of Aspect Ratio on the Flow Characteristics of Elliptic Jets
- 발행 : 1992.06.01
초록
본 연구에서는 종횡비가 다른 3가지의 날카로운 모서리를 가진 타원 슬롯노즐 (AR=1,2,4)을 풍동 수축부 끝에 장착하여 타원제트의 유동특성 및 축교차현상을 3-D LDV 시스템을 이용하여 조사하였다.
The effect of aspect ratio on the flow characteristics of elliptic jets was experimentally investigated. The flow characteristics of sharp-edged elliptic nozzles with aspect ratio of 1 (round nozzle), 2 and 4 were measured by using a 3-D LDV system along the major and minor axis at X/De = 2, 3, 5, 7 and along the centerline up to X/De = 14. At each measurement point mean velocites, turbulent intensities, skewness of three orthogonal velocity components, and Reynolds shear stress were obtained. The Reynolds number based on the nozzle exit velocity and nozzle equivalent diameter(De) was about 4 * 10