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CFD를 이용한 병열 배열형 상향류식 침전지 수리해석에 관한 연구(I) - 침전지 내 유입유량 불균등 영향 조사 -
박노석,김성수,최종웅,성열붕,강문선,Park, No-Suk,Kim, Seong-Su,Choi, Jong-Woong,Sung, Youl-Boong,Kang, Moon-Sun 대한상하수도학회 2013 상하수도학회지 Vol.27 No.4
In order to investigate the influence of feed water inequity on the settling performance for parallel arranged upflow sedimentation basin in domestic G_WTP(Water Treatment Plant), CFD(Computational Fluid Dynamics) simulation were employed and ADV(Acoustic Doppler Velocimeter) measurements were carried out. From the results of both CFD simulations and ADV measurements, the differences among inlet flow rates to each inlet structure make turbulent energy dissipation uneven overall sedimentation basin. Especially local velocities in the near of both side wall were observed over the design overflow rate(74.4 mm/min). Also, it was confirmed that this inequity of inlet flow would exert an serious influence on the turbidity of settled water which is out from 8 troughs. Even though experimental velocities in full scale basin about 20% higher than the simulated, the results of ADV measurement were in good accordance with those of CFD simulations.
수리구조 개선을 통한 분배수로 균등분배 성능 향상에 관한 연구(II): Pilot plant 실험을 통한 최적화
박노석,김성수,황준식,임재림,김충환,Park, No-Suk,Kim, Seong-Su,Hwang, Jun-Sick,Im, Jae-Rim,Kim, Chung-Hwan 대한상하수도학회 2007 상하수도학회지 Vol.21 No.5
In order to suggest the methodology for improving the equality of flow distribution in a distribution channel, wet tests were carried out for pilot plant which was scaled down to 1/8 of full scale distribution channel being operated in domestic K_water treatment plant. The correlation between various hydraulic variables and their effects on the equality of flow distribution was evaluated through wet tests using pilot plant. From the results of wet tests, the longitudinal baffle with orifices was installed in the distribution channel, the equality of flow distribution was improved on the condition that the Froude number in pilot plant was similar with that in the full scale channel. Also, the opening ratio of the orifices on the longitudinal baffled did not have influence on the performance of the equality of flow distribution when the average flow velocity and Froud number were relatively low (Froude number ${\fallingdotseq} 0.01$). In the other hand, the performance of the equality of flow distribution was improved with increasing the opening ration of on the longitudinal baffle under conditions of relatively high average flow velocity and high Froud number(${\gtrsim}0.1$)
CFD를 이용한 병열 배열형 상향류식 침전지 수리해석에 관한 연구(II) - 침전지 내 유입유량 균등성 향상을 위한 유입 분배수로 개선 -
박노석,김성수,최종웅,왕창근,Park, No-Suk,Kim, Seong-Su,Choi, Jong-Woong,Wang, Chang-Keun 대한상하수도학회 2014 상하수도학회지 Vol.28 No.2
In order to suggest the methodology for improving the equity of flow distribution in open channel with multiple outlet, CFD simulations were carried out for actual scale distribution channel being operated in domestic G_WTP(Water Treatment Plant). Also, before and after installing the longitudinal multi hole(diameter=250 mm, 116 holes) baffle suggested by this research, turbidity measurements data were collected for evaluating the effects of hydraulic modification for inlet flow equity. From the both results, total turbidity of settled water was lowered by 30 % and equity of flow distribution was improved about 60 % compared with before hydraulic structure modification.