| Citation: | YANG Xuesen, CHENG Xianda, WANG Tianchi, et al. Transient simulation for gas turbine overall performance coupled with secondary air system[J]. Journal of Aerospace Power, 2023, 38（11）：2618-2628 doi: 10.13224/j.cnki.jasp.20210376
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To improve the simulation accuracy of transient gas turbine overall performance, a refined secondary air system (SAS) model was established and perfected in a modular fashion. A coupled simulation method for transient performance and secondary air system was further proposed. A two-spool gas turbine was modeled to analyze the dynamic variations of the SAS bleeding and returning as well as their effects on the overall engine performance parameters. Results showed that the effect of engine operating conditions on mass fractions of cooling air can be evaluated by coupled simulation method. A variation of 0.18% in the mass fractions of cooling air was observed during the sudden load change process. By comparison, this value increased to 0.55% for the gas turbine with a sudden load shedding. The mutual interactions between the main flow path and the SAS had more effect on the imbalanced local response of the SAS than the overall engine performance parameters. This phenomenon cannot be neglected in the elaborate simulation of modern gas turbines.
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