کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8060303 1520424 2015 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical performance analysis of acoustic Doppler velocity profilers in the wake of an axial-flow marine hydrokinetic turbine
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
پیش نمایش صفحه اول مقاله
Numerical performance analysis of acoustic Doppler velocity profilers in the wake of an axial-flow marine hydrokinetic turbine
چکیده انگلیسی
The stream-wise velocity deficit and tangential swirl velocity caused by the moving rotor lead to significant misrepresentation of the true flow velocity profiles by the VADCP. The most significant errors were observed in the transverse (cross-flow) velocity direction, with a relative error of 17% of the incident velocity. The relative RMS error over the rotor plane was calculate to be less than 2% of the incident velocity by a distance of x/D⩾2,x/D⩾1 and x/D⩾6 for the stream-wise, transverse and vertical directions, respectively. For the default instrument orientation, A maximum error in the V-velocity occurs when the instrument is located directly behind the turbine, and a maximum W-velocity error is found at a lateral offset y/D=0.20. For an instrument directly behind the MHK device, the maximum error in the U-velocity and V-velocity occurs at a yaw angle of ϕ≈30° and ϕ≈60°.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Marine Energy - Volume 11, September 2015, Pages 50-70
نویسندگان
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