Discussion and Improvement of the Rectification Capability of NEL Rectifier under the Concentric Reducer Based on FLUENT Simulation

In the present article, an improvement scheme is proposed that targets the downstream flow field and excess pressure loss under the influence of concentric reducer, which cannot be effectively improved by an NEL (Spearman) rectifier, accompanied with verification through FLUENT analogue simulation. The verification results indicate that the present improvement scheme considerably improved the rectification effect of the NEL rectifier on the downstream flow field under the influence of concentric reducer, effectively reduced the pressure loss caused by the rectifier and reduced the energy consumption. The present improvement scheme is applicable to other types of orifice rectifiers and beneficial for the improvement of the measurement accuracy of flowmeters in industrial application and the reduction of energy consumption.