Isı Bilimi ve Tekniği Dergisi 1300-3615 2667-7725 Türk Isı Bilimi ve Tekniği Derneği 10.47480/isibted.1793055 Energy Generation, Conversion and Storage (Excl. Chemical and Electrical) Enerji Üretimi, Dönüşüm ve Depolama (Kimyasal ve Elektiksel hariç) Şebeke Dışı Uygulamalar İçin Küt Cisimlerin Arkasındaki Girdap Kaynaklı Titreşimlerle Uyarılan Piezoelektrik Film Transdüserleri Kullanılarak Enerji Hasadı Energy Harvesting Using Piezoelectric-Film Transducers Excited by Vortex-Induced Vibrations Behind Bluff Bodies for Off-Grid Applications https://orcid.org/0000-0002-0238-164X Burgaç Alper ADANA ALPARSLAN TÜRKEŞ BİLİM VE TEKNOLOJİ ÜNİVERSİTESİ 05 01 2026 46 1 119 129 09 30 2025 03 21 2026 Copyright © 1977, Isı Bilimi ve Tekniği Dergisi 1977 Isı Bilimi ve Tekniği Dergisi

Piezoelektrik enerji hasadı, geleneksel enerji kaynaklarının erişilemediği sistemlere güç sağlamak açısından büyük önem taşımaktadır. Bu çalışma, farklı boyutlardaki yarım dairesel küt cisim silindirlerinin arkasında oluşan girdap titreşimlerinden yararlanarak, piezoelektrik film transdüserleri kullanarak uzak ve şebekeden bağımsız ortamlarda enerji üretmek için yeni bir tasarım modeli önermektedir. Enerji hasadı performansı, küt cisimlerin arkasında oluşan kuyruk girdapları incelenerek analiz edilmiş ve piezoelektrik film transdüserler farklı konum ve konfigürasyonlarda yerleştirilmiştir. Küt cisimlerin arkasındaki akış yapılarının görselleştirilmesi sonuçları sunulmuş ve akış topolojisi ile enerji üretimi arasındaki ilişki açıklanmıştır. Deneysel sonuçlar, optimize edilmiş konfigürasyonlar için çıkış kondansatör voltaj seviyelerinin ortalama olarak sırasıyla 2,41 V ve 2,84 V değerlerine ulaştığını göstermektedir. Bulgular, piezoelektrik film transdüserlerin enerji üretim performansının öncelikle girdap kopması desenleriyle olan harmonik etkileşimler tarafından belirlendiğini ve hem küt cisim geometrisi hem de transdüserlerin konumsal yerleşimi ve yönelimi tarafından güçlü bir şekilde etkilendiğini ortaya koymaktadır. Bu çalışma, uzak bölgelerde kendi kendine yeterli enerji üretimini mümkün kılma potansiyelini vurgulamakta olup, düşük güçlü askeri ve iletişim sistemlerinde umut verici uygulamalara sahiptir.

Piezoelectric energy harvesting is crucial for providing power to systems where conventional power sources are unavailable. This study proposes a novel design model to generate energy in remote and off-grid environments by utilizing piezoelectric-film transducers in conjunction with vortex-induced vibrations behind semi-circular bluff body cylinders of varying sizes. The energy harvesting performance is analyzed by investigating wake vortices generated behind the bluff bodies, with the piezoelectric-film transducers placed at different positions and configurations. Flow visualization results of the wake structures behind the bluff bodies are presented, elucidating the relationship between flow topology and energy generation. Experimental results demonstrate that the output capacitor voltage levels reach averages of 2.41 V and 2.84 V for the optimized configurations. The findings reveal that the energy production performance of piezoelectric-film transducers is primarily governed by harmonic interactions with the vortex shedding patterns and is strongly affected by both the bluff body geometry and the spatial placement and orientation of the transducers. This study highlights the potential of this approach for enabling self-sufficient energy generation in remote areas, with promising applications in low-power military and communication systems.

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