Abu K. Estimate of main function parameters of gas turbine engine in operation

In the dissertation the problems of estlniatlon for main functional gas turbine engine parameters obtaining from recorder under using mathematical model of working process of bypass two-shaft engines operating at airline MEA (Lebanon, Beirut) are elucidated. The principal attention was concentreted on simulation of the main kinds of turbofan engine air flow duck. The account Is accompanied by description of the typical malfunctions and failures, analysis of the changing perfomance parameters for operating time necessary for Identification these damages. The methods of estimation and forecasting for functional parameters under changing heat-transfer properties of air depending on regions of engine operation have been developed. The methods of normalizing parameters of working process are supplemented taking into consideration Individual peculiarities of gas turbin engine. The method Is need for practical realization of developed methodical support. Complex methods was devised taking Into account establi shed In airline MEA system of maintenance service with gas turbine engine performance parameters control and taking into account engines operating raglons. Efficiency of the methods reducing and estimation of the main gas turbine engine functional parameters was examined using real flight data of turbofan engines JT3D and I1C-90A. The substantiation of simplified method of thrust changes estimation after perfomed works and regular maintenance check, basing on change of nozzle-exit pressure at the control point was accomplished. In connection with presence of polytypic alrcrafts in airline MEA the problems of devised method adaptation for engines of different levels of controllability are considered. The main rezalts of dissertation are inculcated in Engineering Department of airline MEA. They are used In teaching process at Beirut Industrial Institute.