Design method and device for self-adaptive gap adjustment variable camber guide vane

Abstract

The invention discloses a design method for a variable-camber guide vane with a self-adaptive gap adjustment function. The design method comprises the steps that firstly, the inlet incoming flow Mach number and the design outlet airflow angle of design points at different spanwise positions of an inlet guide vane are determined; 2, determining the chord length Cfb of the front blade; step 3, determining the maximum thickness Tmax; 4, determining a blade profile; step 5, determining a seam; step 6, selecting the position of the rotating shaft; step 7, selecting a proper position of the rotating shaft; and step 8, carrying out spanwise stacking on the element blade profiles obtained according to the step 1 to the step 7 at different heights along the position of the rotating shaft to form an entity of the blade. The invention further discloses a variable-camber guide vane device capable of achieving self-adaptive gap adjustment by means of the method. According to the designed guide vane device, the working range of the variable camber blades is expanded, and under the same working conditions, the backward angle is reduced, and the total pressure loss coefficient is reduced.

Description

technical field [0001] The invention relates to the technical field of compressor guide vanes, in particular to a design method and device for adaptive gap adjustment variable camber guide vanes. Background technique [0002] For most ground gas turbines and compressors for aero engines, they are equipped with inlet guide vanes to create the desired direction of inlet flow. When the adjustable inlet guide vane is working, as the speed of the compressor decreases, it will rotate to adjust the installation angle of the vane to provide the required outlet airflow angle. At this time, the angle of attack of the guide vane will increase greatly. The angle of attack will cause the airflow to pass through the blade to produce a large total pressure loss and boundary layer separation. As a new form of adjustable guide vane, the variable camber guide vane greatly broadens the working range of the guide vane. In 1968, B.A.JONES and D.LWRIGHT of the NASA laboratory in the United Stat...

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Problems solved by technology

[0003] However, in the actual use of the variable curvature guide vane, when the rotation angle is too large, the rear blade will be seriously separated, which also limits the scope of use of the variable curvature guide vane, and it is urgent to obtain a wider adjustment through a reasonable design method range of variable camber guide vanes

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