Numerical Study of A Generic Tidal Turbine Using BEM Optimization Methods
نویسندگان
چکیده
Three blade-geometry optimization models derived along with assumptions from the blade element momentum (BEM) approach are studied by using a steady BEM code to improve small horizontal-axis rotor of three blades that has been previously used in experiments. The base linear-radially varying chord length and pitch angle, while other noted as Burton, Implicit Hansen due their references characteristics yield non-linearly angle. aim is compare these rapid study how embedded them affect performance induction factors. It found model least (Hansen) which considers blade-profile drag its procedure yields highest power coefficient, CP, at optimal tip speed ratio (TSR), about 7% higher than one also CP high TSR. produces an axial factor distribution closest 1D value 1/3. All optimized tangential induction-factor distributions closely vary inverse square radial distance, being mildly distribution. shows sufficient swirl necessary increase but level causing not too much energy loss unnecessary wake. At TSR, all rotors adversely produce thrust one, most (Burton) thrust. Details given power, thrust, hydrodynamic efficiency
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ژورنال
عنوان ژورنال: China Ocean Engineering
سال: 2021
ISSN: ['0890-5487', '2191-8945']
DOI: https://doi.org/10.1007/s13344-021-0032-1