Ellipse/circular arc chute processing machine box

Abstract

The invention relates to an ellipse / circular arc chute processing machine box applying to a rotor blade tip end region of an axial flow compressor. For the design of the ellipse or circular arc chute processing machine box, the greater flow loss of the processing chute caused by the rectangular and trapezoid design of the traditional processing machine box is taken into account. Through the reasonable design of a geometric construction type of the processing chute, namely the combination design that an ellipse shape is adopted at the R direction (radial) and a circular arc shape is adopted at the Z direction (axial), the greater low loss caused by the rectangular and trapezoid design is avoided, thus the efficiency is not reduced, meanwhile the stall margin of the compressor is improved greatly for the ellipse or circular arc chute processing machine box.

Description

technical field [0001] The invention relates to a device for improving the stability margin of a compressor, in particular to an ellipse and arc chute processing casing which can obviously improve the stability margin of a compressor without reducing its peak efficiency. Background technique [0002] Compressors are widely used in aero-engines and industrial production. With the continuous improvement of the load factor of the compressor stage, the unstable flow of the compressor becomes more and more prominent, such as rotating stall, surge, etc., which greatly limits the further improvement of the performance of the compressor. When rotating stall occurs, there are one or more low-energy stall clusters rotating along the circumference of the compressor, the performance of the compressor will suddenly drop, the flow rate, pressure ratio and efficiency will all drop to the lowest point, and the compressor blades will be periodically damaged. Exciting force, even cause the o...

AI Technical Summary

Problems solved by technology

[0006] Summing up the traditional casing technology, there is such a disadvantage: while improving the stability margin of the compressor, it is always at the cost of reducing the insulation efficiency

In an aero engine, the reduction in the adiabatic efficiency of the compressor means that the fuel consumption will be more

[0007] One of the most important reasons why the traditional treatment casing will reduce the peak efficiency of the compressor is the unreasonable design of the geometric structure of the treatment tank

The treatment tank of the traditional treatment casing has at least one rectangular or trapezoidal design in the three directions of R (radial direction), Z (axial direction) and θ (circumferential direction). Larger vortex loss due to corner area

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