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rdfs:label "PENGARUH TANDEM STAGGER CYLINDER TERHADAP PERFORMA\r\nHIDRODINAMIKA DRAG TURBIN (Text)"^^xsd:string .
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dc:title "HTML Summary of #3166 \n\nPENGARUH TANDEM STAGGER CYLINDER TERHADAP PERFORMA
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bibo:abstract "Turbin Savonius memiliki konstruksi sederhana dan kemampuan self-starting yang\r\nbaik, tetapi performanya masih terbatas akibat drag negatif pada returning blade serta\r\npembentukan wake yang menyebabkan kehilangan energi. Penelitian ini bertujuan\r\nmenganalisis pengaruh empat circular cylinder dalam konfigurasi tandem-stagger\r\nterhadap performa hidrodinamika turbin Savonius menggunakan simulasi\r\nComputational Fluid Dynamics dua dimensi. Simulasi dilakukan menggunakan\r\npendekatan Unsteady Reynolds-Averaged Navier–Stokes dan model turbulensi SST kω dengan fluida kerja air, kecepatan aliran bebas 1 m/s, bilangan Reynolds 3,6 × 10⁵,\r\nserta sudut stagger 45°. Variasi spacing ratio yang digunakan adalah S/D = 0,8; 0,9;\r\n1,0; dan 1,1. Model numerik diverifikasi melalui uji grid independence dan divalidasi\r\ndengan membandingkan kecenderungan hasil simulasi terhadap penelitian\r\nsebelumnya. Parameter yang dianalisis meliputi distribusi tekanan, pola aliran,\r\nkarakteristik wake, coefficient of moment, dan coefficient of power. Hasil penelitian\r\nmenunjukkan bahwa seluruh variasi cylinder mampu meningkatkan performa\r\ndibandingkan turbin konvensional. Konfigurasi S/D = 0,9 menghasilkan performa\r\nterbaik dengan Cm maksimum sebesar 0,515 dan Cp maksimum sebesar 0,373, yang\r\nmeningkat masing-masing sekitar 41,5% dan 62% dibandingkan turbin konvensional.\r\nKonfigurasi tersebut mampu mengarahkan aliran menuju advancing blade,\r\nmengurangi drag negatif pada returning blade, serta menghasilkan pola wake yang\r\nlebih teratur. Dengan demikian, konfigurasi tandem-stagger cylinder efektif digunakan\r\nsebagai metode passive flow control untuk meningkatkan performa hidrodinamika\r\nturbin Savonius.\r\nKata kunci: turbin Savonius, tandem-stagger cylinder, hidrodinamika, CFD,coefficient of moment, coefficient of power.\r\n\r\n===========================================================\r\n\r\nThe Savonius turbine has a simple construction and good self-starting capability, but\r\nits performance remains limited due to negative drag on the returning blade and wake\r\nformation that causes energy losses. This study analyzes the effect of four circular\r\ncylinders arranged in a tandem-stagger configuration on the hydrodynamic\r\nperformance of a Savonius turbine using two-dimensional Computational Fluid\r\nDynamics simulations. The simulations were performed using the Unsteady ReynoldsAveraged Navier–Stokes approach and the SST k-ω turbulence model, with water as\r\nthe working fluid, a free-stream velocity of 1 m/s, a Reynolds number of 3.6 × 10⁵, and\r\na stagger angle of 45°. The tested spacing ratios were S/D = 0.8, 0.9, 1.0, and 1.1. The\r\nnumerical model was verified through a grid-independence test and validated against\r\nprevious studies. The evaluated parameters included pressure distribution, flow\r\npatterns, wake characteristics, coefficient of moment, and coefficient of power. The\r\nresults showed that all cylinder configurations improved turbine performance\r\ncompared with the conventional design. The S/D = 0.9 configuration produced the best\r\nperformance, with a maximum Cm of 0.515 and a maximum Cp of 0.373, representing\r\nimprovements of approximately 41.5% and 62%, respectively. Therefore, tandemstagger cylinders are effective passive flow-control devices for improving the torque\r\nand power performance of a hydrokinetic Savonius turbine.\r\nKeywords: Savonius turbine, tandem-stagger cylinder, hydrodynamics, CFD,\r\ncoefficient of moment, coefficient of power."^^xsd:string;
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dct:date "2026-07-15";
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dct:title "PENGARUH TANDEM STAGGER CYLINDER TERHADAP PERFORMA\r\nHIDRODINAMIKA DRAG TURBIN"^^xsd:string;
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skos:prefLabel "TL Motor vehicles. Aeronautics. Astronautics"@en .
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foaf:givenName "GUNAWAN"^^xsd:string;
foaf:name "GUNAWAN SAKTI"^^xsd:string;
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