Design of pressure-adjustable gas flow experimental facility

With the advantage of low initial investment and high running efficiency, experimental facility for flow measurement using master meter method has a broad application. Meanwhile, the sonic nozzle based on the reliable hydrodynamic theory has the merit of direct traceability. Possessing the both merits mentioned above, the gas flow experimental facility with pressure adjustment, where positive-pressured Venturi sonic nozzles are used as the check standard and gas turbine meters as the working standard, is put forward in this paper.