What is it about?
The work describes a method for the prediction of a rotor blade performance parameters based on a Mean Line (ML) approach. The 1D model is extended to cover a quasi-2D analysis in the Discretised Compressor approach and employed for design optimisation of a transonic fan and compressor with clean and distorted inflow conditions. The results are compared with standard CFD to verify the accuracy of the ML approximation.
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Why is it important?
The design of distortion-tolerant rotor blades or non-axisymmetric stator vanes is an emerging topic because of the nonuniform inflow conditions that future engines are expected to operate with. The verification of the suitability of low order models for rapid design space exploration or preliminary optimisation is important in order to understand whether they can be applied effectively to predict the distorted performance with an acceptable fidelity, or further extension of their correlations is necessary,
Perspectives
The ML model still needs an improvement of its predicition capabiity, especially in the high speed region of the flow, but it is a very fast and useful tool that, once perfected, can provide an initial guess for distortion-tolerant blades geometry.
Andrea Magrini
Universita degli Studi di Padova
Read the Original
This page is a summary of: Axial Rotor Design under Clean and Distortion Conditions using Mean-Line and CFD Methods, January 2021, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/6.2021-0264.
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