## Multi-Physical analysis of the effect of cable layout, distance between cables and ambient temperature on cable current carrying capacity in air vehicle wiring with finite element method Hava araçlarında kablolamada kablo düzeninin, kablolar arası uzaklığın ve ortam sıcaklığının kablo akım taşıma kapasitesine etkisinin sonlu elemanlar yöntemi ile çoklu fiziksel analizi

Journal of the Faculty of Engineering and Architecture of Gazi University, vol.38, no.4, pp.2147-2154, 2023 (SCI-Expanded)

• Publication Type: Article / Article
• Volume: 38 Issue: 4
• Publication Date: 2023
• Doi Number: 10.17341/gazimmfd.971960
• Journal Name: Journal of the Faculty of Engineering and Architecture of Gazi University
• Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Art Source, Compendex, TR DİZİN (ULAKBİM)
• Page Numbers: pp.2147-2154
• Keywords: Air vehicle cables, current carrying capacity, finite element method, multi-physical analysis, thermal analysis
• Istanbul Technical University Affiliated: Yes

#### Abstract

In this paper, in order to determine the laying conditions of power cables used in air vehicles, the thermal behavior, which is one of the dominant factors affecting the current carrying capacity, was investigated by the finite element method. For this purpose, electrical-thermal multiple physical analysis model was created in COMSOL programme to observe the relationship between the temperature of the cable and the environment in which it is laid and the current carrying capacity. In the analysis, 2 AWG (39.19 mm2) cross-section cables in accordance with SAE AS22759/1 standard were taken into consideration. Within the scope of the study, the effect of both the ambient temperature and the distance between the cables on the current carrying capacity of the cable was examined. Considering the maximum temperature value (200℃) that the selected cables can withstand, while there is a distance of 75 mm between the cables it has been observed 198A for a cable. When the distance between the cables is 30 mm and the cables are adjacent, current values are as 184A and 181A, respectively. When the cables are in adjacent, analysis was performed for ambient temperature values of 70℃, 50℃ and 20℃. According to these ambient temperature values, current carrying capacity is calculated as 179A, 191,5A and 205A respectively. As a result of the analysis, the decrease in the distance between the cables causes the current carrying capacity of the cable to decrease and it has been observed that the decrease in the ambient temperature also causes the current carrying capacity of the cable to increase.