PSI - Issue 42

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ Structural Integrity Procedia 00 (2019) 000 – 000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 42 (2022) 639–646

© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the 23 European Conference on Fracture – ECF23 Abstract Environmental concerns and the decline of Earth’s natural resources are among the most prominent issues in today’s society, leading to stringent policies regarding commercial vehicle emission products, such as nitrogen oxides ( N O x ) and carbon dioxide ( C O 2 ) emission levels. Aiming to reduce their environmental footprint, car manufacturers have chosen to integrate the Exhaust Gas recirculation (EGR) cooler technology into their vehicles decades ago, as this is a resourceful and effective technique for reducing N O x emissions. This technique is still applied in hybrid cars and is foreseen to be used in future moved vehicles, proving its contemporaneity, adequacy, and relevancy. Nevertheless, this technology requires that different factors be considered during the design phase, such as high gas temperatures, mechanical vibrations, and other loads, as these may affect overall performance and durability. Therefore, this study aims to assess the impact of varying the inner fin length on the applied loads and how it may affect the EGR Cooler efficiency. To this end, Computer-Aided Engineering (CAE) tools using numerical methods, such as Finite Element Method (FEM) and Finite Volume Method (FVM), were applied. This investigation revealed that varying the inner fin´s length affects each of the applied loads differently, and increasing the length was shown to improve the heat transfer process of the EGR; however, it also increases the thermally induced stresses at the hottest region, diminishing the fatigue resistance of the component. The advantages and disadvantages of several configurations understudy were addressed in the work carried out. © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 Keywords: Exhaust gas recirculation system; Fatigue life; Product design. 23 European Conference on Fracture - ECF23 Influence of the fin to baffle distance on te perature, stress distribution and fatigue life of a cooled Exhaust as ecirculation syste Ricardo Pires a , Rui F. artins a,b *, Rodolfo Prieto c a UNIDEMI, Department of Mechanical and Industrial Engineering, NOVA School of Science and Technology, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal b Laboratório Associado de Sistemas Inteligentes, LASI, 4800-058 Guimarães, Portugal c BorgWarner Emissions Systems, Viana do Castelo, Portugal Abstract Environmental concerns and the decline of Earth’s natural resources are among the most prominent issues in today’s society, leading to stringent policies regarding commercial vehicle emission products, such as nitrogen oxides ( N O x ) and carbon dioxide ( C O 2 ) emission levels. Aiming to reduce their environmental footprint, car manufacturers have chosen to integrate the Exhaust Gas recirculation (EGR) cooler technology into their vehicles decades ago, as this is a resourceful and effective technique for reducing N O x emissions. This technique is still applied in hybrid cars and is foreseen to be used in future moved vehicles, proving its contemporaneity, adequacy, and relevancy. Nevertheless, this technology requires that different factors be considered during the design phase, such as high gas temperatures, mechanical vibrations, and other loads, as these may affect overall performance and durability. Therefore, this study aims to assess the impact of varying the inner fin length on the applied loads and how it may affect the EGR Cooler efficiency. To this end, Computer-Aided Engineering (CAE) tools using numerical methods, such as Finite Element Method (FEM) and Finite Volume Method (FVM), were applied. This investigation revealed that varying the inner fin´s length affects each of the applied loads differently, and increasing the length was shown to improve the heat transfer process of the EGR; however, it also increases the thermally induced stresses at the hottest region, diminishing the fatigue resistance of the component. The advantages and disadvantages of several configurations understudy were addressed in the work carried out. © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) er-review under responsibility of 23 European Conference on Fracture - ECF23 Keywords: Exhaust gas recirculation system; Fatigue life; Product design. 23 European Conference on Fracture - ECF23 Influence of the fin to baffle distance on temperature, stress distribution and fatigue life of a cooled Exhaust Gas Recirculation system Ricardo Pires a , Rui F. Martins a,b *, Rodolfo Prieto c a UNIDEMI, Department of Mechanical and Industrial Engineering, NOVA School of Science and Technology, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal b Laboratório Associado de Sistemas Inteligentes, LASI, 4800-058 Guimarães, Portugal c BorgWarner Emissions Systems, Viana do Castelo, Portugal

* Corresponding author. Tel.: +351 21 294 85 67; fax: +351 21 294 85 31. E-mail address: rfspm@fct.unl.pt * Corresponding author. Tel.: +351 21 294 85 67; fax: +351 21 294 85 31. E-mail address: rfspm@fct.unl.pt

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the 23 European Conference on Fracture – ECF23 10.1016/j.prostr.2022.12.081