The purposes of modeling and simulation of a turbojet engine are the steady state analysis and transient analysis. From the steady state analysis, which consists in the investigation of the operating, equilibrium regimes and it is based on appropriate modeling describing the operation of a turbojet engine at design and off-design regimes, results the performance analysis, concluded by the engine’s operational maps (i.e. the altitude map, velocity map and speed map) and the engine’s universal map. The mathematical model that allows the calculation of the design and off-design performances, in case of a single spool turbojet is detailed. An in house code was developed, its calibration was done for the J85 turbojet engine as the test case. The dynamic modeling of the turbojet engine is obtained from the energy balance equations for compressor, combustor and turbine, as the engine’s main parts. The transient analysis, which is based on appropriate modeling of engine and its main parts, expresses the dynamic behavior of the turbojet engine, and further, provides details regarding the engine’s control. The aim of the dynamic analysis is to determine a control program for the turbojet, based on the results provided by performance analysis. In case of the single-spool turbojet engine, with fixed nozzle geometry, the thrust is controlled by one parameter, which is the fuel flow rate. The design and management of the aircraft engine controls are based on the results of the transient analysis. The construction of the design model is complex, since it is based on both steady-state and transient analysis, further allowing the flight path cycle analysis and optimizations. This paper presents numerical simulations for a single-spool turbojet engine (J85 as test case), with appropriate modeling for steady-state and dynamic analysis.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Performance analysis and dynamic modeling of a single-spool turbojet engine



    Conference:

    ICNPAA 2016 WORLD CONGRESS: 11th International Conference on Mathematical Problems in Engineering, Aerospace and Sciences ; 2016 ; La Rochelle, France


    Published in:

    Publication date :

    2017-01-27


    Size :

    8 pages





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Dynamic characteristics of a single-spool turbojet engine

    Craig, R T / Vasu, George / Schmidt, R D | NTRS | 1953


    Dynamic Characteristic Tests of Single Spool Turbojet Engine Using Altitude Test Facility

    Tagashira, Takeshi / Sugiyama, Nanahisa / Koh, Masaharu | AIAA | 2007


    The development of single-spool turbojet engine off-design analysis program

    Hartono, F. / Indra, A. | American Institute of Physics | 2023



    Parametric Analysis of Expendable type Single-Spool Turbojet Engine with a Short Afterburner

    Haider, Basharat Ali / Davidovic, Nikola / Durrani, Naveed | AIAA | 2011