TY - GEN

T1 - Performance simulation of roughness induced module variations of a jet propulsion by using pseudo bond graph theory

AU - Göing, Jan

AU - Bode, Christoph

AU - Friedrichs, Jens

AU - Seehausen, Hendrik

AU - Herbst, Florian

AU - Seume, Joerg R.

N1 - Funding Information: The authors kindly thank the German Research Foundation (DFG) for the financial support to undergo the research projects D6 ”Interaction of combined module variances and influence on the overall system behavior” and B3 ”Loss Behavior of Complex Surface Structures” within the Collaborative Research Center (CRC) 871 - Regeneration of Complex Capital Goods. Moreover, the authors would like to acknowledge the substantial contribution of the DLR Institute of Propulsion Technology and MTU Aero Engines AG for providing TRACE.

PY - 2020

Y1 - 2020

N2 - A scientific method is developed to determine the impact of a deteriorated HPC (high-pressure compressor) on the overall performance of a turbofan jet engine. Initially, the HPC performance with roughness variations on vanes and blades is simulated by using 3D CFD (Computational Fluid Dynamics) at different operating points. Afterwards, the overall performance of the full jet engine is computed by the in-house 1D performance tool ASTOR (AircraftEngine Simulation for Transient Operating Research). ASTOR is based on the Pseudo Bond Graph approach to model and connect miscellaneous components with the equations of motion and dynamic volumes. By solving this differential equation system, transient performance is calculated in higher accuracy compared to common Reduced Order Models (ROM). Transient load cases are modelled to analyse the impact of deteriorated HPC on the overall performance. Furthermore, similarities and differences to the steady performance are considered. The maximum deviation of EGT between an engine with a new and deteriorated HPC during a fast acceleration is 32% while it is 27% at steady operation. Also a trade-off between an increasing EGT and a decreasing pressure downstream of the LPT is analysed. Finally, relations between the engine performance, Reynolds-number and roughness are analysed to classify the performance drop due to a HPC with roughness.

AB - A scientific method is developed to determine the impact of a deteriorated HPC (high-pressure compressor) on the overall performance of a turbofan jet engine. Initially, the HPC performance with roughness variations on vanes and blades is simulated by using 3D CFD (Computational Fluid Dynamics) at different operating points. Afterwards, the overall performance of the full jet engine is computed by the in-house 1D performance tool ASTOR (AircraftEngine Simulation for Transient Operating Research). ASTOR is based on the Pseudo Bond Graph approach to model and connect miscellaneous components with the equations of motion and dynamic volumes. By solving this differential equation system, transient performance is calculated in higher accuracy compared to common Reduced Order Models (ROM). Transient load cases are modelled to analyse the impact of deteriorated HPC on the overall performance. Furthermore, similarities and differences to the steady performance are considered. The maximum deviation of EGT between an engine with a new and deteriorated HPC during a fast acceleration is 32% while it is 27% at steady operation. Also a trade-off between an increasing EGT and a decreasing pressure downstream of the LPT is analysed. Finally, relations between the engine performance, Reynolds-number and roughness are analysed to classify the performance drop due to a HPC with roughness.

UR - http://www.scopus.com/inward/record.url?scp=85099787433&partnerID=8YFLogxK

U2 - 10.1115/GT2020-14456

DO - 10.1115/GT2020-14456

M3 - Conference contribution

AN - SCOPUS:85099787433

VL - 1

BT - Proceedings of the ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition

PB - American Society of Mechanical Engineers(ASME)

T2 - ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition, GT 2020

Y2 - 21 September 2020 through 25 September 2020

ER -