Numerical Simulation and Analysis of Gas Flow Field in Serrated Valve Column

Abstract

Abstract: A three-dimensional computational fluid dynamics (CFD) model for gas flow through a serrated valve tray was presented. The flow field, as well as the dry-pressure drop of the valve under the full-opening condition was simulated based on the proposed model by using FLUENT 6.0 software. Compared with the values of dry-pressure drop in different turbulent models, the simulated results using RNG k-ε model are in reasonable agreement with experimental data, indicating that RNG k-ε model is suitable in simulating gas flow through the serrated valve tray. Then the CFD model combining RNG k-ε model was used to study the three-dimensional gas flow through the considered serrated valve tray. The simulated results showed that various eddies existed on the serrated valve tray, and both the eddy and the non-eddy areas were nearly equal. The existence of addendum can decrease the eddy area caused by gas passing through the lateral outlet slots. The size of eddies can be reduced by optimizing the distance between valves.

Key words: serrated valve, numerical simulation, pressure drop, RNG k-ε turbulent model

摘要： A three-dimensional computational fluid dynamics (CFD) model for gas flow through a serrated valve tray was presented. The flow field, as well as the dry-pressure drop of the valve under the full-opening condition was simulated based on the proposed model by using FLUENT 6.0 software. Compared with the values of dry-pressure drop in different turbulent models, the simulated results using RNG k-ε model are in reasonable agreement with experimental data, indicating that RNG k-ε model is suitable in simulating gas flow through the serrated valve tray. Then the CFD model combining RNG k-ε model was used to study the three-dimensional gas flow through the considered serrated valve tray. The simulated results showed that various eddies existed on the serrated valve tray, and both the eddy and the non-eddy areas were nearly equal. The existence of addendum can decrease the eddy area caused by gas passing through the lateral outlet slots. The size of eddies can be reduced by optimizing the distance between valves.

关键词: serrated valve, numerical simulation, pressure drop, RNG k-ε turbulent model

WANG Lianghua, CUI Juejian, YAO Kejian. Numerical Simulation and Analysis of Gas Flow Field in Serrated Valve Column[J]. , 2008, 16(4): 541-546.

王良华, 崔觉剑, 姚克俭. Numerical Simulation and Analysis of Gas Flow Field in Serrated Valve Column[J]. , 2008, 16(4): 541-546.

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