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45° 원형층돌분류의 혼합유동구조에 대한 난류모델 평가
김장권(J. K. Kim),오석형(S. H. Oh) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.6
In this paper, the CFD analysis using various turbulent models has been performed to evaluate which type of turbulent models can predict well the mixing flow structure of 45° impinging round jet. This CFD analysis has been carried out through the commercial Fluent software. As a result, any of turbulent models cannot predict the experimental results definitely all over the flow range. However, as compared with the experimental results, the turbulent model of realizable(RLZ) k-ε only predicts well in the limited range between X/X<sub>0</sub>= 1.1 and X/X<sub>0</sub>=2.0.
[연구논문] 슬릿과 스월베인이 Gun식 가스버너의 주 유동장에 미치는 영향
김장권(J. K. Kim),정규조(K. J. Jeong) 군산대학교 수산과학연구소 2004 군산대학교 수산과학연구소 연구논문집 Vol.5 No.-
This paper is studied to investigate the effect of-slits and swirl vanes on the main flow fields of a gun -type gas burner through X-Y plane and Y-Z plane respectively by using X -probe from hot -wire anemometer system. This experiment was carried out with flow rate"" 50 e /min in respective burner models installed in the test section of a subsonic wind tunnel. The burner models with only slits and only swirl vanes respectively were made by modifying original gun-type gas burner. The fast jet flow spurted from slits played a role such as an air-curtain because it encircled rotational flow by swirl vanes and drives mixed main flow to axial direction. As a result. the gun -type gas burner had a wider flow range up to about Y/R= 1.5 deviated from slits and maintains a comparatively large velocity in the central part of burner within the range of about X/R=2.5. Therefore, it was very desirable that swirl vanes were installed within slits in gun-type gas burner in order to control the main flow fields effectively.