Research on Real-Time Model of Turboshaft Engine with Surge Process

At present, the main data source for the verification of surge detection devices still relies on the surge test of the compressor or the whole engine which makes it urgent to study the simulation methods of the whole engine surge process to replace the high-cost and high-risk surge test. To solve this problem, a turboshaft engine component level model (CLM) is established firstly and then the compressor characteristic lines are expanded in the classic Moore-Greitzer (MG) model to establish an extended MG model. Finally, a novel real-time surge model based on the surge mechanism for simulating the turboshaft engine dynamic process of surge is proposed with considering the coupling relationship between compressor’s rotor speed, mass flow and pressure of CLM and extended MG model. The simulation results show that the model can realize the whole-process simulation of the whole process of steady—surge—steady under multiple operating states of the engine. The change characteristics of the rotor speed, compressor outlet pressure, mass flow, exhaust gas temperature and other parameters are consistent with the test data, which means this model can be further applied to the simulation test research of surge detection and anti-surge control.