Erdoğan Beytullah, Güneş Abdulsamed, Çakmak Gülşah
Department of Mechanical Engineering, Zonguldak Bülent Ecevit University, Zonguldak 67100, Turkey.
Department of Electric and Energy, Firat University, Elazığ 23119, Turkey.
Nanomaterials (Basel). 2025 Mar 25;15(7):489. doi: 10.3390/nano15070489.
In the study conducted for the cooling systems of MALE class unmanned aerial vehicles using internal combustion engines, new type radiators were designed using spring-structure fins. Among the radiators formed with spring structures acting as fins, the radiator developed using springs with a pitch of 2.25 mm was named Radiator-Y1, the radiator developed using springs with a pitch of 4.25 mm was named Radiator-Y2, and the radiator developed using springs with a pitch of 8.25 mm was named Radiator-Y3. This design change is seen as an innovative method that can increase heat transfer on the radiator surface and increase cooling performance by increasing the turbulence effect of the air affecting the radiator. Experimental studies were carried out using single type (AlO and ZnO) and hybrid (ZnO-CuO) nanofluids in addition to pure water. Experiments were carried out using different air speeds (8-10-12 m/s) and different coolant flow rates (20-22 L/min) and radiator performance was investigated. The effects of the surface area created by the spring structure and the turbulence effect on heat transfer were evaluated. As a result of the studies, Radiator-Y1 showed the best cooling performance among the radiators developed with spring structures, followed by Radiator-Y2 and Radiator-Y3. It was observed that the nanofluids used had a positive effect on the cooling performance compared with pure water, as did the hybrid nanofluid compared when compared with single type nanofluids.
在针对使用内燃机的MALE级无人机冷却系统进行的研究中，采用弹簧结构翅片设计了新型散热器。在由充当翅片的弹簧结构形成的散热器中，使用节距为2.25毫米的弹簧开发的散热器被命名为散热器-Y1，使用节距为4.25毫米的弹簧开发的散热器被命名为散热器-Y2，使用节距为8.25毫米的弹簧开发的散热器被命名为散热器-Y3。这种设计变更被视为一种创新方法，它可以增加散热器表面的热传递，并通过增加影响散热器的空气的湍流效应来提高冷却性能。除了纯水之外，还使用单一类型（AlO和ZnO）和混合（ZnO-CuO）纳米流体进行了实验研究。使用不同的风速（8-10-12米/秒）和不同的冷却液流速（20-至22升/分钟）进行实验，并研究散热器性能。评估了由弹簧结构产生的表面积和湍流效应对热传递的影响。研究结果表明，在采用弹簧结构开发的散热器中，散热器-Y1表现出最佳的冷却性能，其次是散热器-Y2和散热器-Y3。观察到，与纯水相比，所使用的纳米流体对冷却性能有积极影响，与单一类型纳米流体相比，混合纳米流体也是如此。
