Development and Sensitivity Analysis of Model for Aeration Chamber in Water-Circulating Aerator

Abstract:

Based on the force balance between the driving force and drag force acting on the gas-liquid two-phase flow in the aeration chamber, a one-dimensional mathematic model of water velocity for the aeration chamber was developed and solved with METLAB. Sensitivity analysis of the model parameters showed that the prediction results were greatly dependant on the flow resistance coefficient at the top (KT) and the coefficient due to local disturbances at the entrance and exit (KE). Using optimized parameters, under air flow rates higher than 0.055m³/s, prediction errors of gas holdup and water velocity can both be further decreased within ± 9%. Developed model of water velocity can be used to design and optimize the aeration chamber in the water-circulating aerator.

• Periodical: Applied Mechanics and Materials (Volumes 260-261)
• Pages: 663-668
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.260-261.663
• Online since: December 2012
• Authors: Xin Sun, Fei Fei Duan, Ting Lin Huang, Meng Dan Zhang
• Keywords: Aeration Chamber, Gas Holdup, Model Sensitivity, Water Velocity, Water-Circulating Aerator

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