Authors: Wenhai Du JunQiang Zhu Olivier Léonard
Publish Date: 2012/07/27
Volume: 21, Issue: 4, Pages: 311-321
Abstract
In this contribution a quasionedimensional tool for stationary and transient simulations of poststall flows in multistage axial compressors is presented An adapted version of the 1D Euler equations with additional source terms is discretized with a finite volume method and solved in time by a fourthorder RungeKutta scheme The equations are discretized at midspan both inside the blade rows and the nonbladed regions The source terms express the bladeflow interactions and are estimated by calculating the velocity triangles for each blade row Loss and deviation correlations are implemented and compared to experimental data in normal flow stalled flow and reversed flow regionsTransient simulations are carried out and a parameter study is presented to analyze the shape of the surge cycles and the frequency of the surge oscillations At last a bleeding control strategy is implemented to study the recoverability of the instabilities in a compression system
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