基于CFD的流动调整器整流性能研究

The flow conditioner is an installation which can reduce the length of straight pipe and improve the accuracy of flowmeter effectively. In this paper the straightening performance of both the Etoile straightener and NEL flow conditioner have been compared by the commercial software Fluent. The simulation results show that the NEL flow conditioner straightens the downstream flow more effectively and produce a fully- developed velocity distribution at the location of 15 pipe diameter downstream. With the Reynolds number increasing to 500000, the effect on NEL flow conditioner is weakened gradually. The Etoile straightener is also valid on the reduction of turbulent disturbance, but the fully-developed velocity distribution can't be achieved in the range of 20 pipe diameter downstream.