Multi-arc chute processing machine box

Abstract

The invention relates to a multi-arc chute processing machine box applying to a rotor blade tip end region of an axial flow compressor. For the design of the multi-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 a double-arc shape is adopted at the direction of the R direction and a circular arc shape is adopted for theta (circumference), the greater low loss caused by the rectangular and trapezoid design is avoided, thus the peak value efficiency is improved slightly, meanwhile the stall margin of the compressor is improved greatly for the multi-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 a multi-arc chute processing casing which can obviously improve the stability margin of a compressor while slightly improving 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 ...

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

At least one of the processing grooves of the traditional processing casing has a rectangular or trapezoidal design in the three directions of R (radial direction), Z (axial direction) and θ (circumferential direction), and the front and rear parts of the processing groove are in line with the The radial angle is mostly designed to be 0°, which will inevitably increase the mixing loss between the airflow ejected from the treatment tank and the main flow area

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