Simulation Studies of Numerical Relationship of Sewage Energy Dissipation Chamber Efficiency

Abstract

The paper introduces a computer model to simulate design of an energy dissipation chamber (EDC). This model allows expressing the air flow rate through the system as a function of the incoming effluent rate. A method is developed to proceed with statistical analysis of simulation results. A set of plots of air flow rate is developed for effluent rates under different parameters of energy dissipation chamber. The approximating function and coefficients allowing obtaining the air consumption under certain conditions (geometrical parameters of the energy dissipation chamber and the effluent rate) are represented. The graphs are obtained in the form of three-dimensional surfaces reflecting a dependence of the ejected air flow rate on the incoming sewage liquid rate for at various values of the stand pipe embedment relative to the liquid level. The developed graphs show that the highest air flow rate is achieved at the maximum water flow rate and at the minimum embedment. Thus, the numerical dependences of the ejected air flow rates were obtained for the energy dissipation chamber as functions of the water flow rate. The embedment of the stand pipe at the level of the overflow wall and the zero inlet radius are shown to be the most effective parameters of energy dissipation chamber design.