基于试车数据的航空发动机起动过程建模

Modeling of An Aero-engine in Starting Process Based on the Test Data

根据某型航空涡轴发动机起动过程工作原理,结合该型发动机试车数据,采用转子动力学特性与数值模拟相融合的方法,创新地提出了一种估算起动过程稳态燃油流量的算法,基于该算法提出并建立了航空涡轴发动机起动过程数学模型,编制了相应的计算程序,并与该型发动机的试车数据进行了对比分析。结果表明,所建立的该型航空涡轴发动机起动过程数学模型所给出的数值计算结果与试车数据具有较好的一致性,该航空涡轴发动机起动过程数学建模方法具有一定的通用性。

According to the working principle of a certain aviation turboshaft engine starting process,a no-vel algorithm is proposed to estimate the＇steady-state fuel flow＇of starting process by combining with test data of this engine and merging rotor dynamics and numerical simulation.Based on this algorithm,a new method is presented to establish a mathematical model of turboshaft engine starting process,and the corre-sponding computer program is prepared and the simulation results are compared with the engine test data. The results show that the numerical results given by the created mathematical model of starting process are of good agreement with test data.The proposed mathematical modeling method of the turboshaft engine starting process is of some versatility.