Hybrid-Dimensional Simulation of Gas Turbine Coupled with 17-Stage Compressor Through-Flow Model
In order to clarify the characteristics of different zooming strategies,and develop the algorithm of gas turbine hybrid-dimensional simulation for multistage compressor with high pressure ratio.For a split-shaft gas turbine and its 17-stage compressor,the hybrid-dimensional simulation models that coupled zero-dimensional engine model and compressor through-flow model were de-veloped based on the De-coupled approach,conventional iterative coupled approach,fully coupled approach,and the improved iterative coupled approach proposed in this paper respectively.The variations of different zooming strategies were compared and analyzed,the results indicate that the De-coupled approach,iterative coupled approach and fully coupled approach can basically achieve the same simulation accuracy,the maximum relative error between simulation result and experimen-tal data is less than 10％.Moreover,the De-coupled approach tends to converge easily,its simulation accuracy and efficiency are affected by factors such as the quality of characteristic map.Although the conventional iterative coupled approach exhibits high simulation efficiency,its robustness is dif-ficult to guarantee in the zooming of multistage compressor with high pressure ratio.The fully coupled approach has relatively low simulation efficiency and high requirements for both the solving algorithm and the initial value of iterative variables.Meanwhile,the improved iterative coupled ap-proach effectively utilizes the wide pressure ratio range of the 17-stage compressor,exhibiting both high robustness and high simulation efficiency,the effect is optimal.
gas turbineoverall performancehybrid-dimensional simulationzooming strategiescompressor through-flow model
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维普
