基于空腔流动理论的市政消火栓盲端铁迁移扩散机理研究

Municipal fire hydrants release ferrous ions into the internal water, which may cause "red water" phenomenon and damage to water supply safety. However, few previous studies aim at the water quality simulation of dead-end branch pipe of fire hydrant, so it is difficult to accurately simulate the fire hydrant iron release phenomenon, which reduces the accuracy of calculation. Aiming at these problems, this study applies square cavity flow mechanism to analysis the problem of iron release from municipal fire hydrant dead-end branch pipe. Meanwhile, this study uses the experiment and numerical simulation to establish the dead-end branch pipe ferrous ion diffusion of computational fluid dynamics model, so as to realize quantitative analysis of the law of the influence of such factors as length, diameter, flow velocity, provide a reference for accurate simulation of fire hydrant water quality.