The Impact Of Manufacturing Variations On Performance Of A Transonic Axial Compressor Rotor
Paper in proceeding, 2018

In this paper, the impact of manufacturing variations on performance of an axial compressor rotor are evaluated at design rotational speed. The geometric variations from the design intent were obtained from an optical coordinate measuring machine and used to evaluate the impact of manufacturing variations on performance and the flow field in the rotor. The complete blisk is simulated using 3D CFD calculations, allowing for a detailed analysis of the impact of geometric variations on the flow. It is shown that the mean shift of the geometry from the design intent is responsible for the majority of the change in performance in terms of mass flow and total pressure ratio for this specific blisk. In terms of polytropic efficiency, the measured geometric scatter is shown to have a higher influence than the geometric mean deviation. The geometric scatter around the mean is shown to impact the pressure distribution along the leading edge and the shock position. Furthermore, a blisk is analyzed with one blade deviating substantially from the design intent, denoted as blade 0. It is shown that the impact of blade 0 on the flow is largely limited to the blade passages that it is directly a part of. The results presented in this paper also show that the impact of this blade on the flow field can be represented by a simulation including 3 blade passages. In terms of loss, using 5 blade passages is shown to give a close estimate for the relative change in loss for blade 0 and neighboring blades.


Marcus Lejon

Chalmers, Mechanics and Maritime Sciences (M2), Fluid Dynamics

Niklas Andersson

Chalmers, Mechanics and Maritime Sciences (M2), Fluid Dynamics

Hans Mårtensson

GKN Aerospace Sweden

Lars Ellbrant

GKN Aerospace Sweden

Proceedings of ASME Turbo Expo 2018


ASME Turbo Expo 2018
Oslo, Norway,

Robust optimering vid konstruktion av skovlar för transonisk strömning

VINNOVA (2013-01183), 2013-08-19 -- 2017-06-30.

Driving Forces

Sustainable development

Areas of Advance


Subject Categories

Aerospace Engineering

Fluid Mechanics and Acoustics


Basic sciences


C3SE (Chalmers Centre for Computational Science and Engineering)



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