Design of Gas Flow Measurement Model for Rectangular Duct in Thermal Power Plant

摘要

Based on the standard k-ε model in Fluent software, the three-dimensional numerical simulation and analysis of the gas flow in the large-diameter rectangular duct and the laboratory duct model of the thermal power plant were carried out. The two-model similarity model cross-sectional pressure cloud and the velocity distribution cloud were obtained. And the general law of fluid movement were obtained. According to the “log-Chebyshev” model, the TES-1340 hot-wire anemometer was used to collect the velocity of the cross section at 0.5D before and after the curve. The average velocity of the fan was obtained at different frequencies. According to the least squares method, the velocity of the measuring point and the average velocity of the section are fitted to obtain the corrected mean velocity table function of the pipe section.