@ARTICLE{Pawlak_Wojciech_I._The_2006,
 author={Pawlak, Wojciech I.},
 volume={vol. 53},
 number={No 4},
 journal={Archive of Mechanical Engineering},
 pages={373-396},
 howpublished={online},
 year={2006},
 publisher={Polish Academy of Sciences, Committee on Machine Building},
 abstract={The effect of processes of accumulating mass and enthalpy of the working medium on the dynamics of transient processes thereof is often discussed in scientific publications on the mathematical modelling of turbine engines (treated as systems that undergo control and automatic adjustment). The paper is intended to make a comparison between findings gained from simulation carried out with two alternative models of an aircraft turbine engine (of the S0-3 type). The first model takes account of the dynamics of the processes of accumulating mass and energy of the working medium within the combustion-chamber volume and that of the convergent nozzle. The second, simplified model, neglects the dynamics of the processes of accumulating mass and energy of the working medium, since it has been assumed that it is the dynamics of the kinetic-energy accumulation in the rotor mass that predominates in various representations of transient processes. To conduct simulation-based experiments, each of the alternative models of an engine was connected to a special simulation unit, which simulated operation of fuel supply and control systems. Two rounds of experiments were carried out. The first one was intended to facilitate observations of transient processes effected with quick shifting of a control lever from the idle position to that of full thrust, and back. In the second round observed were processes resulting from changes in the critical jet area. The second, alternative model was used to investigate the effect of ever-greater hypothetical volumes of the nozzle on how the transient processes proceeded. It has been found that in the case of the S0-3 engine, low nozzle capacity remains of only slight effect on how the transient processes proceed. Hence, simplified modelling methodology is fully justified.},
 type={Article},
 title={The effect of convergent-nozzle volume on transient processes in a turbojet engine},
 URL={http://www.journals.pan.pl/Content/124923/PDF-MASTER/7_MECHANICAL_53_2006_4_Pawlak_The_effect.pdf},
 keywords={turbine engine, transient processes, mathematical modelling, digital simulation},
}