Study on Steady Flow Structure of Gas Flow Standard Device

The sonic nozzle method gas flow standard device is used in the field of flow metering and is widely used by domestic and foreign testing organizations. The gas flow device based on the sonic nozzle usually uses the atmosphere as the gas source. The flow state of the gas is unstable during the transmission process, in order to reduce the influence on the measurement, To improve the measurement accuracy of the flow meter, it is necessary to stabilize the airflow. For the moment, steady flow structure using a combination of pipe, there are still deficiencies. Thus, a new steady flow structure of honeycomb combined straight pipe is proposed., through simulation and comparison of various velocity maps and distribution maps of the two model flow fields, the honeycomb combined straight pipe shows better results.