ResearchProject Area D
Subproject D6

Subproject D6 Interaction of combined module variances and influence on the overall system behaviour

The maintenance, repair and overhaul (MRO) of complex and multidisciplinary systems as gas turbines and jet engine requires an intensive empirical experience work process to develop a regeneration process for each single component. However, the diagnosis and the overall understanding of the repaired subsystems can be improved by model and simulate the interaction of the overall systems. In collaboration with the Institute of Jet Propulsion and Turbomachinery (IFAS) of the TU Braunschweig the software tool ASTOR (AircraftEngine Simulation of Transient Operation Research) is developed to simulate the interaction of combined module variances and the influence on the overall system. ASTOR is based on the pseudo bond graph and is able to connect all subsystem to simulate the overall system behaviour. The conservation equations are solved in each time step with individual storages in the pseudo bond graph theory. 

MOTIVATION AND OBJECTIVES

Pseudo Bond Graph of the V2500 - A1 jet engine

Performance calculations are necessary for the design process and the health monitoring of a complex capital good. A digital twin can be represented with these calculation methods. So far, the performance models are based on numerical reduced order models without the momentum equations and without dynamic control volumes. The pseudo bond graph approach is able to improve the performance calculations. In this theory, all equations of motion are solved with individual dynamic control volumes in order to investigate the transient load case in a higher accuracy. In the software tool ASTOR (AircraftEngine Simulation of Transient Operation Research), the complex capital goods are transformed into the pseudo bond graph notation with the information of the combined module variance to simulate the influence on the overall system performance. In figure 1 the pseudo bond graph of the V2500 – A1 is pictured. With ASTOR, a high-fidelity digital twin for transient load cases will be developed.

RESULTS

In the first step, a reference model of a new V2500-A1 jet engine was developed (see joule process fig 2.). Based on this propulsion the stationary and transient performances were simulated in different load cases. Furthermore, different deteriorated performances maps are simulated for future investigation with the real test engine of the V2500-A1.

T-s-diagram of a new V2500-A1 (green) and a deteriorated V2500-A1 (rot)

CURRENT RESEARCH AND OUTLOOK

In the next steps, ASTOR will be extended and different deteriorated cases will be investigated and validated. Furthermore, the effect of local heat flows inside of the propulsion will be implemented. Together with the part projects A3, A6 and B3, a digital twin of the own test engine will be generated to investigate the interaction of different repair technologies and possibilities with part project D5 and S.


PUBLICATIONS

All publications of the Collaborative Research Centre

SUBPROJECT LEADER

Prof. Dr.-Ing. Jens Friedrichs
Address
TU Braunschweig
Hermann-Blenk-Strasse 37
38108 Braunschweig
Prof. Dr.-Ing. Jens Friedrichs
Address
TU Braunschweig
Hermann-Blenk-Strasse 37
38108 Braunschweig

STAFF

Jan Göing
Address
TU Braunschweig
Hermann-Blenk-Strasse 37
38108 Braunschweig
Jan Göing
Address
TU Braunschweig
Hermann-Blenk-Strasse 37
38108 Braunschweig