- 운전점이 다른 소형 축류홴의 난류 유동장 고찰
- ㆍ 저자명
- 김장권,Kim. J.K.
- ㆍ 간행물명
- 한국동력기계공학회지
- ㆍ 권/호정보
- 2008년|12권 5호|pp.40-47 (8 pages)
- ㆍ 발행정보
- 한국동력기계공학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
The turbulent flow characteristics around a small-size axial fan(SSAF) for a refrigerator are strongly dependent upon the operating points. Four operating points such as $phi$ =0.1, 0.18, 0.25 and 0.32 were adopted in this study to investigate three-dimensional turbulent flow characteristics around the SSAF by using a fiber-optic type Laser Doppler Anemometer(LDA) system. Downstream mean velocity profiles of the SSAF along the radial distance show that axial and tangential velocity components exist predominantly, except $phi$ = 0.1, and have a maximum value at $r/R{fallingdotseq}0.8$, but radial velocity component having a relatively small value only turns flow direction to the outside or the central part of the SSAF. The turbulent intensity shows that the radial component exists most greatly after $r/R{fallingdotseq}0.5$. Downstream turbulent kinetic energy at $phi$ = 0.25 and 0.32 together has the largest peak value at $r/R{fallingdotseq}0.9$.