Vortex Shedding Lock-In due to Pitching Oscillation of a Wind Turbine Blade Section at High Angles of Attack
المؤلفون المشاركون
Pellegrino, Alberto
Meskell, Craig
المصدر
International Journal of Aerospace Engineering
العدد
المجلد 2019، العدد 2019 (31 ديسمبر/كانون الأول 2019)، ص ص. 1-12، 12ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2019-03-11
دولة النشر
مصر
عدد الصفحات
12
الملخص EN
The unsteady flow around a pitching two-dimensional airfoil section (NREL S809) has been simulated using unsteady RANS with the transition SST turbulence model.
This geometry is chosen to represent a wind turbine blade in a standstill configuration.
The Reynolds number is Re=106 based on a chord length of 1 m.
A prescribed sinusoidal pitching motion has been applied at a fixed amplitude of 7° for a range of high angles of attack 30°<α<150°.
At these incidences, the airfoil will behave more like a bluff body and may experience periodic vortex shedding.
It is well known that, in bluff body flows, oscillations can lead to a lock-in (lock-in) of the vortex shedding frequency, fv, with the body’s motion frequency, fp.
In order to investigate the susceptibility of airfoil to lock-in, the frequency ratio r (r=fp/fv0) has been varied around r=1.
The lock-in region boundaries have been proposed, and an analysis of the effect of the oscillation amplitude has been conducted.
The lock-in map obtained suggests that, for the vibration amplitude considered, the risk of vortex-induced vibration is more significant in the regions of α≈40° and α≈140°, i.e., for shallower characteristic lengths.
Finally, a lumped parameter wake oscillator model has been proposed for pitching airfoils.
This simple model is in qualitative agreement with the CFD results.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Meskell, Craig& Pellegrino, Alberto. 2019. Vortex Shedding Lock-In due to Pitching Oscillation of a Wind Turbine Blade Section at High Angles of Attack. International Journal of Aerospace Engineering،Vol. 2019, no. 2019, pp.1-12.
https://search.emarefa.net/detail/BIM-1156850
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Meskell, Craig& Pellegrino, Alberto. Vortex Shedding Lock-In due to Pitching Oscillation of a Wind Turbine Blade Section at High Angles of Attack. International Journal of Aerospace Engineering No. 2019 (2019), pp.1-12.
https://search.emarefa.net/detail/BIM-1156850
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Meskell, Craig& Pellegrino, Alberto. Vortex Shedding Lock-In due to Pitching Oscillation of a Wind Turbine Blade Section at High Angles of Attack. International Journal of Aerospace Engineering. 2019. Vol. 2019, no. 2019, pp.1-12.
https://search.emarefa.net/detail/BIM-1156850
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1156850
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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