Method for determining length of sewage diffuser based on cooperation of physical model test and numerical simulation

Abstract

The invention discloses a method for determining the length of a sewage diffuser based on the cooperation of a physical model test and numerical simulation. The method includes the following steps that the length of the diffuser is preliminarily estimated, the number of ascending tubes contained in the diffuser is determined, the sewage diffusion effect is analyzed by the utilization of numerical simulation, the sewage diffusion effect in a near region is simulated by the utilization of a physical model, hydraulic power numerical simulation of the diffuser is conducted, the hydraulic power physical model test of the diffuser is conducted, and the length with the good hydraulic power feature is the finally-determined length. According to the method, sewage diffusion and hydraulic power outflow are analyzed, and the defects that a traditional method is too single and a computed result cannot be verified are overcome; through the length of the diffuser determined through the method, the sewage dilution diffusion effect can be guaranteed, sewage normal outflow can be also achieved, and a sewage discharge project can be efficiently operated; cost can be saved for a construction unit through the result, and good economic benefits are possessed.

Description

technical field [0001] The invention relates to a design for a sewage discharge diffuser, in particular to a design method for a sewage deep-sea discharge diffuser. Background technique [0002] Sewage deep-sea discharge is to strictly control the location and scope of the sewage mixing area, meet the water quality target requirements of the discharge water area, and not affect the use function and ecological balance of the surrounding waters. On the premise of selecting a suitable sewage outlet location, selecting a reasonable design and reliable operation It is an engineering technical measure to dispose of sewage by adopting scientific engineering system measures and rationally utilizing the purification capacity of sea areas. That is to say, after the pretreatment required by the regulations, the sewage is transported offshore to a certain underwater depth through a long discharge pipe laid on the seabed, and then a porous diffuser with a considerable length and a specia...

AI Technical Summary

Problems solved by technology

Although this method has a strong scientific nature, the calculation accuracy cannot be verified, and the calculation results of different software have large deviations, and the results cannot be reflected in actual working conditions.

[0011] From the above analysis, it can be seen that the current method for determining the length of the diffuser is relatively simple, and each method has certain limitations.

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