Numerical Analysis of a Rotating Cylinder with Spanwise Disks

Thouault, N.; Breitsamter, Christian; Adams, Nikolaus A.; Seifert, J.; Badalamenti, Carmine; Prince, Simon

doi:10.2514/1.j050856

Cited by 20 publications

(15 citation statements)

References 12 publications

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“…Fig. 3 summarises variation of Lift coefficient (C L ) of a rotating circular cylinder versus Drag coefficient (C D ) at relatively high Reynolds number (10 4 Re 10 5 ) and the spinning ratio of 0 ώ 4 [13] which is also correlated with the following polynomial fit.…”

Section: Experimental Measurements On Lift and Drag Of Spinning Cylinmentioning

confidence: 80%

“…The results of the experimental and numerical works of [13] and [7] together with the above correlated fits (1) and (2) are shown in Fig. 4.…”

Section: Experimental Measurements On Lift and Drag Of Spinning Cylinmentioning

confidence: 85%

“…According to numerous experimental and numerical studies, the magnitude of the lift and drag forces and also friction torque depends on the spinning ratio ώ and the Reynolds number [1,7,13]. Fig.…”

Section: Experimental Measurements On Lift and Drag Of Spinning Cylinmentioning

confidence: 99%

“…Experimental and numerical works for large Reynolds numbers 4 Â 10 4 < Re<6.6 Â 10 5 by Refs. [12,13] suggest that 2 < ώ < 4 may be a proper range for using Magnus effects in wind turbines whilst avoiding higher values of drag coefficient at higher rotational speeds. However, the monotonic increase of lift coefficient over the rotating cylinders may not be maintained due to instabilities, 3D effects, and centrifugal forces.…”

Section: Background Introduction and Literature Reviewmentioning

confidence: 99%

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Magnus type wind turbines: Prospectus and challenges in design and modelling

Sedaghat

2014

Renewable Energy

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a b s t r a c tOne of attracting concepts has been the use of Magnus effect to produce lift from rotating cylinders in various engineering applications. With emerging innovative Magnus type wind turbine technology, it is important to determine power performance and characteristics of such generators as correctly as possible. As stressed by Seifert, there is lack of theories in design and modelling of using Magnus force in engineering which is particularly noticed for the horizontal axis Magnus type wind turbines. In this study, the importance of research carried out for determining lift and drag forces of rotating circular cylinders is highlighted and reviewed. Then, the theoretical methods used in designing commercial aerofoil type wind turbines are extended to apply on the Magnus types. New formulation is presented for potential flow around the Magnus blades. The blade element momentum (BEM) theory is formulated for the Magnus wind turbines. A cubic function for angular induction factor is found from the BEM analysis which is strongly dependant on the drag to lift ratio. It is also observed that the relative wind incidence angle and the local power coefficient of the Magnus cylinder are independent functions of spin ratio.

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Section: Experimental Measurements On Lift and Drag Of Spinning Cylinmentioning

confidence: 80%

“…The results of the experimental and numerical works of [13] and [7] together with the above correlated fits (1) and (2) are shown in Fig. 4.…”

Section: Experimental Measurements On Lift and Drag Of Spinning Cylinmentioning

confidence: 85%

Section: Experimental Measurements On Lift and Drag Of Spinning Cylinmentioning

confidence: 99%

Section: Background Introduction and Literature Reviewmentioning

confidence: 99%

See 2 more Smart Citations

Magnus type wind turbines: Prospectus and challenges in design and modelling

Sedaghat

2014

Renewable Energy

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show abstract

“…Нестаци-онарное обтекание цилиндрического тела вызывает коле-бания инженерных конструкций и их резонанс (крыльев самолетов, высотных зданий, длинных мостов, кабелей и морских инженерных сооружений), создает акустиче-ский шум [1][2][3][4]. Хорошо известны различные методы управления потоком за обтекаемыми цилиндрическими телами: вращение поверхности самого тела (эффект Магнуса [5][6][7][8][9][10][11]), использование отсоса пограничного слоя [2], а также использование плазменных актуа-торов (активных электроразрядных устройств) [12][13][14][15][16][17][18][19][20][21][22][23][24]. Основным достоинством плазменных актуаторов явля-ется их быстродействие, основанное на электронном управлении параметрами электрических разрядов.…”

Section: Introductionunclassified