A kind of air flow mixer used in the high-altitude flow simulation device of planar cascade

Abstract

The invention discloses an air flow mixer for a plane blade cascade high-altitude flow simulation device. The airflow mixer includes an intake pipe, an annular straight pipe, a rectifier pipe and an exhaust pipe; the intake pipe and the exhaust pipe are straight pipes, and the rectifier pipe is an annular cone pipe; the intake pipe, the rectifier pipe and the exhaust pipe are sequentially welded along the airflow direction from front to back Fixed, the annular straight pipe is sheathed outside the rectifier pipe, the front end of the annular straight pipe is welded with the intake pipe and reinforced with a rib plate, and the rear end of the annular straight pipe is welded with the air outlet pipe and reinforced with a rib plate; between the annular straight pipe and the rectifier pipe The space is the airflow mixing chamber; the wall surface of the rectifier tube is opened with holes, and the opening rate is 45% to 70%. The airflow mixer has a simple structure, significantly shortens the length of the intake pipe, improves the circumferential uniformity of the mixed airflow, provides a stable and uniform inflow for the cascade test section, and improves the flow field quality and test accuracy of the cascade test section. Spend.

Description

technical field [0001] The invention belongs to the field of aero-engine basic research test equipment, and in particular relates to an airflow mixer used for a plane cascade high-altitude flow simulation device. Background technique [0002] Aviation turbines (including fans / compressors and turbines) and gas turbines are key components for maintaining thermal cycles and generating thrust, and the aerodynamic shape of their rotor / stator blades determines the aerodynamic performance of aviation turbines and gas turbines. In order to design high-performance aerojet engines and gas turbines, it is necessary to study the design method and flow characteristics of the turbine at the cascade (two-dimensional airfoil) level. In order to conduct experimental research on the aerodynamic characteristics of cascade passage flow under real flight conditions on the ground, it is necessary to build ground equipment that can simulate parameters such as the Mach number and Reynolds number of...

AI Technical Summary

Problems solved by technology

This method has disadvantages such as too long intake pipeline, turbulent mixed air flow, poor circumferential uniformity, poor flow field quality in the test section, and low test accuracy.

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