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촉진제 설치에 따른 충돌분류에서 PIV계측에 의한 유동해석
이상범(Sangbum Lee),송민근(Mlngeun Song),손승우(Seungwoo Son),주은선(Eunsun Ju) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
The objective of this study is to investigate characteristics of flow by the promoter setup and the choice of the turbulent intensity enhancement section. The promoter was setup vertically to the way of a nozzle exit. flow, each pitch fixed to be 30㎜ and the measurement region divided by 4 section (A, B, C, D). The characteristics of flow field were investigated in each case of the distance rate from the nozzle exit to impinging plate(H/B=4. 6, 8, 10> changing nozzle exit diameter(10, 17, 23㎜) and Re=4,000.<br/> As the experimental result by PIV measurement, scale of the ,rector profile showed a tendency to an unbalance parabola distribution as increasing of the nozzle diameter at H/b=8. C section and free jet. When the Square promoter installed in front of the impinging plate the acceleration of the flow and the eddies due to the promoter seem to contribute to the turbulence intensity enhancement in nozzle diameter 23㎜, H/B=6, and the B section. The turbulent intensity rate is about 1.8 times larger than that without square promoter.
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