@article{article_1767600, title={COMPARISON OF OCTAGONAL AND TWISTED FINS FOR BATTERY THERMAL MANAGEMENT IN UNMANNED AERIAL VEHICLES AT HIGH DISCHARGE RATES}, journal={Uludağ Üniversitesi Mühendislik Fakültesi Dergisi}, volume={30}, pages={957–976}, year={2025}, DOI={10.17482/uumfd.1767600}, author={Yaşar, Onur}, keywords={Deşarj oranı, Isıl yönetim, Batarya, Sıcaklık}, abstract={Cooling strategy including fins is considered as an effective approach due to its successful results, especially in batteries. To maintain the battery peak temperature within a desired range and thereby improve flight performance and extend service life of unmanned aerial vehicles (UAVs), this paper deals with fin cooling of lithium-polymer batteries. A 6s1p lithium-polymer battery is modeled with octagonal and twisted fins separately. Both models are simulated in a wind tunnel by using RNG k-ε model. Peak temperatures of finless battery model are compared with those of finned models. The motivation of this study is to improve flight performance and extend service life of UAVs by ensuring thermal management of pouch-type lithium-polymer batteries under high discharge rates using octagonal and twisted fins. According to the results, battery model including twisted fins enables lower peak temperatures approximately by 1 K compared to those of octagonal fins under the same boundary conditions. Inlet air temperature of 268.15 K and inlet air velocity of 2.4 m/s for battery models with octagonal and twisted fins can keep peak temperature at 307.44 K and 305.97 K, respectively. This paper provides an insight into the significance of novel fins for battery thermal management in UAVs.}, number={3}, publisher={Bursa Uludağ Üniversitesi}