The stability of a steadily propagating planar premixed flame has been the subject of numerous studies since Darrieus and Landau showed that in their model flames are unstable to perturbations of any wavelength. Moreover, the instability was shown to persist even for very small wavelengths, i.e. there was no high-wavenumber cutoff of the instability. In addition to the Darrieus–Landau instabili...

Rüzgar türbinlerinde kanat profili seçimi türbinin aerodinamik performansı açısından çok önemlidir. Bu çalışmada dikey eksenli H-Darrieus rüzgar simetrik ve asimetrik kullanımının türbin verimine olan etkisi sayısal olarak incelenmiştir. Beş (NACA0009, NACA0012, NACA0015, NACA0018, NACA0021) ile beş profilinin (NACA2412, NACA4412, NACA6412, NACA8412, NACA10412) türbininde kullanılması durumunda...

The angle and number of wind turbine blades. used for testing is a vertical Darrieus-H type with variations in the blades 2, 3, 4. Blades NACA 4415 specifications, speeds 4 m/s, 5 6 7 m/s s, 8 m/s. source using fan. Variations attack are 0o, 10o, 20o, 30o. blade made sea sengon wood. At position attack, 10o rotates faster due to influence lifting force 0o difficult rotate because straight direc...

Potensi sumber daya energi terbarukan di Indonesia sangat besar. tersebut dapat dimanfaatkan untuk mendistribusikan secara merata. Salah satu pemanfaatannya yaitu dengan menggunakan turbin angin Darrieus mengubah menjadi listrik. Berbagai upaya telah dilakukan guna meningkatkan kinerja turbin. Penelitian ini studi numeric memvariasikan tinggi fin mengetahui nilai Cp, Ct dan TSR. Metode Computat...

Vertical axis wind turbines such as Darrieus are a very interesting category of low speed domestic turbines. Further research work is needed to enhance their efficiency fulfill the higher demand in small applications for power generation. The main objective this find turbine design boost starting capacity through an opening located at lower surface airfoil. We carried out thorough CFD (Computat...