<p>There will inevitably be some deviation between the shape of the actual processed blade and the design blade in the machining process of the compressor blade. In order to study the influence mechanism of blade thickness deviation on performance, Rotor37 was taken as the research object and a three-dimensional time-invariant numerical simulation method was adopted. The blade was parameterized and the thickness was increased or decreased uniformly, with changes of 0.06mm and 0.1mm, respectively. Numerical results show that the blade thickness deviation can change the total pressure ratio, isentropic efficiency and stability margin of the single-stage rotor. Take the thickness deviation of +0.1mm as an example, the peak efficiency is reduced by 0.7%, the peak efficiency flow is reduced by 2.12%, the total pressure ratio at the flow is reduces by 0.96%, and the stability margin is increased by 2.21%. It is find that the total pressure loss coefficient changes significantly in the flow field, which plays a major role in the performance change, the flow field structure at the leading edge and trailing edge of the blade also changed. It is also worth noting that for the same thickness variation, the variation of performance parameters caused by thickness increase is not as same as thickness decrease.</p>

Influence of Thickness Deviation of Axial Flow Compressor Blade on Its Performance

Paper Proceedings: https://asmedigitalcollection.asme.org/GT/GT2021/volume/84898

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