An analysis approach for micro gas turbine engine's performance by experiment and numerical simulation

The corrected special maps of components have revealed an outstanding role on valuating the offdesign performance of micro gas turbine engines. The main purpose of this paper is to investigate the steady-state performance at design and off-design point of a micro turbojet engine capable of generating 400 N thrust. At present work, the experiments were conducted and the thrust and specific fuel consumption are 39.48 daN and 1.62kg/(daN h) at design point, respectively. Importantly, a present methodology, that is adjusting the values of Beta and N/sqrt(T) in specific map of the components when performing the off-design calculation of this engine, is proposed in this research, where results are compared with the data from experiment and other literature. Exemplarily, according to a comparison with the experimental results, there is less than 1% of the deviation in thrust at design point and 3% of the difference in the thrust at off-design point with the corrected specific map when performing the numerical simulation. This method enables evaluating the operating characteristics of both on design and off-design point, providing more accurate trend analysis of performance parameters in terms of engine compared to the researches which seldom used the scaling map.