科研之友
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摘要
The efficiency of gas turbine generally deteriorates at the condition of medium or low load. In order to acquire higher off-design efficiency, the hybrid electric propulsion system based on gas turbines and electric machines becomes a mainstream development trend of the aero and other power system. The hybrid electric propulsion scheme based on variable power offtakes from highand low-pressure shafts is proposed in this paper. The power offtakes of high- and low-pressure shafts are introduced as control variables to decouple the rotational speeds of high- and low-pressure shafts from the gas turbine load and optimize the component match under off-design working conditions. The component-level simulation model is utilized to investigate the decoupling control strategy based on variable power offtakes for gas turbines. Under some working conditions, the specific fuel consumption is decreased by 12.2%, the combustor exit total temperature is decreased by 13.14 K. ? 2022, Science Press. All right reserved.
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