PSI - Issue 10

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 1 (2018) 171–178 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. © 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/) Peer-review under responsibility of the scientific committee of the 1st International Conference of the Greek Society of Experimental Mechanics of Materials. 1 st International Conference of the Greek Society of Experimental Mechanics of Materials Experimental analysis of the water salinity impact on the energy consumption of small desalination plants K. Christopoulos a , N. Pospotikis a , Em. Kostopoulos a , E. Kondili b , J.K. Kaldellis a, * a Soft Energy Applications & Environmental Protection Lab, Mechanical Engineering Department,University of West Attica, Athens, Greece b Optimisation of Production Systems Laboratory, Mechanical Engineering Department, University of West Attica, Athens, Greece Abstract In the present research, the topic of desalination is investigated both theoretically and experimentally. In the theoretical part, information is provided on water consumption aspects in Greece and worldwide, on the problem of water shortage globally and on the solution of desalination. In the experimental part, the pilot Reverse Osmosis (RO) unit used for the conduction of this study is presented in detail, while following that, the experimental results are analysed, mainly focusing on the energy consumption of the RO desalination unit. Additional results concerning the effect of water pressure and water salinity on the energy consumption and the clean water production flow rate of the experimental desalination unit are presented and the relative conclusions are drawn. © 2018 The Authors. Publi hed by Els vier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/). Peer-review under responsibility of the scientific committe of the 1 st International Conference of the Greek Society of Experimental Mechanics of Materials Keywords: Reverse osmosis desalination; seawater salinity; specific energy consuption; photovoltaic energy production 1. Introduction Water s ortage has emerged as one of the most crucial natural resources depletion problem, especially in areas with sp c fic geographical characteristics, e.g. island r gi ns ( ig. a). The general problem of clean water shortage is becoming more severe, as economic growth, irrigation needs, declining precipitation levels and overexploitation of a a a b , e by Elsevier Ltd. This is an open access article under the CC BY-NC-ND t 1. Introduction © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016.

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation.

* Corresponding author. Tel.: +30 210 5381493 E-mail address: jkald@puas.gr Received: May 07, 2018; Received in revised form: June 23, 2018; Accepted: July 07, 2018 al

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 Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/) Peer-review under responsibility of the scientific committee of the 1st International Conference of the Greek Society of Experimental Mechanics of Materials. 10.1016/j.prostr.2018.09.025 2452- 3216 © 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/). Peer-review under responsibility of the scientific committee of the 1 st International Conference of the Greek Society of Experimental Mechanics of Materials t * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt