Optimasi Jumlah dan Sudut Blade Terhadap Perfoma Turbin Vortex Ultra Low-Head Berbasis Cfd
Keywords:
Blade, Jumlah, Sudut, Turbin VortexAbstract
Ketergantungan berlebihan pada bahan bakar fosil telah mendorong pengembangan teknologi energi terbarukan skala kecil, salah satunya turbin vortex ultra-low head yang mampu memanfaatkan situs aliran air tanpa bendungan (dam-less). Studi numerik untuk mengetahui perfoma trubin vortex ultra low head menarik untuk dikaji lebih dalam. Kaji numerik efek variasi jumlah blade (4, 6, dan 8) dan sudut kemiringan blade (0°, 5°, dan 10°) terhadap perfoma turbin vortex ultra-low head. Diusulkan menggunakan Metoda Computational Fluid Dynamics (CFD) dengan pemodelan multifase Volume of Fluid (VOF) dan model turbulensi k-ω Standard diterapkan dalam keadaan steady. Hasil simulasi menunjukkan bahwa peningkatan jumlah dan sudut blade secara konsisten meningkatkan distribusi kecepatan aliran, tekanan, debit, gaya tangensial, serta daya turbin. konfigurasi 4 blade sudut 0° menghasilkan efisiensi 13,15% dikecepatan aliran 23,13 m/s. Sedangkan konfigurasi 8 blade sudut 10° menghasilkan efisiensi 22,5% pada kecepatan aliran 23,13 m/s, Penelitian ini memberikan kontribusi berupa pemetaan pengaruh variasi jumlah dan sudut blade terhadap karakteristik aliran dan efisiensi turbin vortex ultra-low head yang belum banyak dikaji secara numerik, sehingga dapat dijadikan acuan desain awal (preliminary design guideline) dalam pengembangan runner turbin vortex untuk aplikasi pembangkit skala mikro pada aliran air dengan head sangat rendah. Model simulasi yang diperoleh dalam penelitian ini berpotensi untuk dikembangkan lebih lanjut pada kajian numerik maupun eksperimental berikutnya.
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