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Int. J. Turbomach. Propuls. Power 2018, 3(2), 14; https://doi.org/10.3390/ijtpp3020014

Sensitivity Analysis of BLISK Airfoil Wear

Technische Universität Braunschweig, Institute of Jet Propulsion and Turbomachinery, Hermann-Blenk-Straße 37, 38108 Braunschweig, Germany
This paper is an extended version of our paper published in Proceedings of the 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC 2017).
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Received: 22 January 2018 / Revised: 13 April 2018 / Accepted: 9 May 2018 / Published: 16 May 2018
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Abstract

The decreasing performance of jet engines during operation is a major concern for airlines and maintenance companies. Among other effects, the erosion of high-pressure compressor (HPC) blades is a critical one and leads to a changed aerodynamic behavior, and therefore to a change in performance. The maintenance of BLISKs (blade-integrated-disks) is especially challenging because the blade arrangement cannot be changed and individual blades cannot be replaced. Thus, coupled deteriorated blades have a complex aerodynamic behavior which can have a stronger influence on compressor performance than a conventional HPC. To ensure effective maintenance for BLISKs, the impact of coupled misshaped blades are the key factor. The present study addresses these effects on the aerodynamic performance of a first-stage BLISK of a high-pressure compressor. Therefore, a design of experiments (DoE) is done to identify the geometric properties which lead to a reduction in performance. It is shown that the effect of coupled variances is dependent on the operating point. Based on the DoE analysis, the thickness-related parameters, the stagger angle, and the max. profile camber as coupled parameters are identified as the most important parameters for all operating points. View Full-Text
Keywords: aerodynamic; compressor; wear aerodynamic; compressor; wear
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Kellersmann, A.; Reitz, G.; Friedrichs, J. Sensitivity Analysis of BLISK Airfoil Wear. Int. J. Turbomach. Propuls. Power 2018, 3, 14.

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