PSI- Issue 9

ScienceDirect Available online at www.sciencedirect.com Available o line at ww.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 9 (2018) 221–228 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000

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XV Portuguese Conference on Fracture, PCF 2016, 10-12 February 2016, Paço de Arcos, Portugal Thermo-mechanical modeling of a high pressure turbine blade of an airplane gas turbine engine P. Brandão a , V. Infante b , A.M. Deus c * a Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal b IDMEC, Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal c CeFEMA, Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal Abstract During their operation, modern aircraft engine components are subjected to increasingly demanding operating conditions, especially the high pressure turbine (HPT) blades. Such conditions cause these parts to undergo different types of time-dependent degradation, one of which is creep. A model using the finite element method (FEM) was developed, in order to be able to predict the creep behaviour of HPT blades. Flight data records (FDR) for a specific aircraft, provided by a commercial aviation company, were used to obtain thermal and mechanical data for three different flight cycles. In order to create the 3D model needed for the FEM analysis, a HPT blade scrap was scanned, and its chemical composition and material properties were obtained. The data that was gathered was fed into the FEM model and different simulations were run, first with a simplified 3D rectangular block shape, in order to better establish the model, and then with the real 3D mesh obtained from the blade scrap. The overall expected behaviour in terms of displacement was observed, in particular at the trailing edge of the blade. Therefore such a model can be useful in the goal of predicting turbine blade life, given a set of FDR data. IGF Workshop “Fracture and Structural Integrity” Structural integrity of a Doubly Fed Induction Generator (DFIG) f a wind power system (WPS) Mohammed Ezzahi a,* , Mohamed Khafallah a , Fatima Majid b a Laboratoire Energie et Systèmes Electriques (LESE), Université Hassan II de Casablanca, Ecole Nationale Supérieure d’Electricité et de Mécanique (ENSEM), Km 7 Route El-Jadida, Casablanca, Maroc b Laboratoire de contrôle et de caractérisation des matériaux et des structures, Université Hassan II, Ecole Nationale Supérieure d’Electricité et de Mécanique (ENSEM), , Km7, Route El-Jadida, Casablanca, MAROC Abstract Improving the electricity production and enhancing the overall and the quality of the electrical grid are obligatory to reach nowadays clients requirements regarding the quality of energy. Thus, the integration of green power such us solar, Wind Power Systems (WPS) and biomass has changed the energy world face, and contributed to satisfy the international needs of energy. The renewable energies are strategic objectives to lead this energetic revolution. In this work, we are interested in the Doubly Fed Induction Generator (DFIG), which is the most used machine in the case of wind power systems. This machine has many advantages such us efforts control over the WPS shaft and the other mechanical parts, less noise and the control of the active and the reactive powers. It uses a back-to-back inverter between the rotor and the grid. The used inverter design can be optimized to reduce the power electronics components losses d th n in rt it into the g id through transformer. The power control s related to both the DFIG and the way its inv rter is controlled. In this paper, we will proceed the structural integrity analysis f a WPS. Indeed, we proceeded a modeling of the DFIG in the rotating (d-q) frame. Then, we applied the vector control of the DFIG, called field oriented control, by approximating the machine model as naturally decoupled current-field machine according to the Park transformation. All the results have been confirmed by simulation in the Matlab\simulink framework. IGF Workshop “Fracture and Structural Integrity” Structural integrity of a Doubly Fed Induction Generator (DFIG) of a wind power system (WPS) Mohammed Ezzahi a,* , Mohamed Khafallah a , Fatima Majid b a Laboratoire Energie et Systèmes Electriques (LESE), Université Hassan II e Casabl nc , Ecole Nationale Supérieure d’Electricité et de Méca ique (ENSEM), Km 7 Ro te El-Jadida, Casabl nca, Maroc b Laboratoire de contrôle et de caractérisation des matériaux et des structures, Université Hassan II, Ecole Nationale Supérieure d’Electricité et de Mécanique (ENSEM), , Km7, Route El-Jadida, Casablanca, MAROC Abstract Improving the electricity production and enhancing the overall and the quality of the electrical grid are obligatory to reach nowadays clients requirements regarding the quality of energy. Thus, the integration of green power such us solar, Wind Power Systems (WPS) and biomass has changed the energy world face, and contributed to satisfy the international needs of energy. The renewable energies are strategic objectives to lead this energetic revolution. In this work, we are interested in the Doubly Fed Induction Generator (DFIG), which is the most used machine in the case of wind power systems. This machine has many advantages such us efforts control over the WPS shaft and the other mechanical parts, less noise and the control of the active and the reactive powers. It uses a back-to-back inverter between the rotor and the grid. The used inverter design can be optimized to reduce the power electronics components loss s and then insert it into the grid through t nsformer. The power control is related to both the DFIG and the way its inverter is controlled. In this paper, we will proc ed the structural int gri y ana ysis of a WPS. Indeed, we proceede a modeling of the DFIG in the rotating (d-q) frame. Then, we applied the vector control of the DFIG, called field oriented control, by approximating the machine model as naturally decoupled current-field machine according to the Park transformation. All the results have been confirmed by simulation in the Matlab\simulink framework.

© 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. © 2018 The Authors. Published by Elsevier B.V. Peer-review under respon ibility of the Gruppo Italiano Frattura (IGF) ExCo. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. © 2018 The Autho s. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. Keywords: Wind Power System; DFIG; Structural integrity; Field oriented control. Keywords: Wind Power System; DFIG; Structural integrity; Field oriented control.

* Corresponding author. Tel.: +212 663 49 90 78; E-mail address: ezzahi1@gmail.com * Corresponding author. Tel.: +212 663 49 90 78; E-mail address: ezzahi1@gmail.com

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2452-3216  2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 10.1016/j.prostr.2018.06.042 * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452 3216 © 2018 Th Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo.