An expansion section for a planar cascade flow simulation device

Abstract

The invention discloses an expansion section for a planar cascade flow simulation device. The expansion section is a double-layer tapered pipe structure, including inlet flange, outer tapered pipe, inner tapered pipe, support plate and outlet flange; the outer tapered pipe is set outside the inner tapered pipe, and the outer tapered pipe and the inner tapered pipe pass through The support plate is welded and connected; the front end of the outer tapered pipe is welded with an inlet flange, and the rear end of the outer tapered pipe is welded with an outlet flange; the taper of the outer tapered pipe is 12°~15°, and the taper of the inner tapered pipe is 5°~ 8°. The expansion section has a simple structure, which effectively reduces the flow velocity and stabilizes the incoming flow, provides a stable and uniform incoming flow for the cascade test section, and improves the flow field quality and test accuracy of the cascade test section.

Description

An expansion section for a planar cascade flow simulation device technical field The invention belongs to the field of basic research and test equipment of aero-engine, be specifically related to a kind of flow for plane cascade Simulate the expansion section of the device. Background technique Aero turbines (including fans / compressors and turbines) and gas turbines maintain a thermodynamic cycle and generate thrust The key components, the aerodynamic shape of its rotating / static blades determine the aerodynamic performance of aero turbines and gas turbines. designed for high Performance of aero jet engines and gas turbines, it is necessary to study the design methods and flow characteristics. In order to conduct the experimental study on the flow and aerodynamic characteristics of the cascade channel under real flight conditions on the ground, it is necessary to build Build a ground flow simulation device that can simulate parameters such as Mach number and Reyn...

AI Technical Summary

Problems solved by technology

At present, the expansion section of the plane cascade high-altitude flow simulation device at home and abroad mostly adopts a large expansion angle conical tube structure. This structure often results in poor flow stability and turbulent airflow in the cascade test section due to excessive speed drop, and has a flow field quality. It is difficult to meet the needs of high-precision measurement of aerodynamic characteristics of planar cascade flow simulation

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