2001
DOI: 10.2172/783086
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The Use of Twist-Coupled Blades to Enhance the Performance of Horizontal Axis Wind Turbines

Abstract: This paper reviews issues related to the use of aeroelastic tailoring as a cost-effective, passive means to shape the power curve and reduce loads. Wind turbine blades bend and twist during operation, effectively altering the angle of attack, which in turn affects loads and energy production. It is possible to build a small amount of desirable twisting into the load response of a blade with proper asymmetric fiber lay up in the blade skin. The tailored twisting can create an aeroelastic effect that has payoff … Show more

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Cited by 61 publications
(44 citation statements)
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“…Another shortcoming is highlighted when utilising this method for BT blades. Assumption of the variation of the tip induced twist by simple linear or quadric functions of wind speed or output power, as assumed by Lobitz et al [9] may lead to unrealistic results. The behaviour of this variation is complicated.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Another shortcoming is highlighted when utilising this method for BT blades. Assumption of the variation of the tip induced twist by simple linear or quadric functions of wind speed or output power, as assumed by Lobitz et al [9] may lead to unrealistic results. The behaviour of this variation is complicated.…”
Section: Discussionmentioning
confidence: 99%
“…Work of Lobitz et al [9] is another example of using this approach. In their work two options have been provided for twist as a function of blade position: constant with span and linear with span.…”
Section: Planned Induced Twistmentioning
confidence: 99%
“…A concept developed in the late 1980's for reducing loads seen by wind turbines is to promote blade twisting to decrease the angle of attack when subject to a wind gust with the use of biased 27 layups in the blade spar cap [16,17]. This final example of the present paper concerns the analysis of the two-cell cross-section of a wind turbine blade shown in Fig.…”
Section: Wind Turbine Blade Sectionmentioning
confidence: 99%
“…Researching related to bend-twist coupling blade in the 1990's are summarized in References [1] and pointed that the enough twist-bend coupling can reduce 10% of the fatigue load and improve energy capture. Reference [2] also confirm that bend-twist coupling blade using off-axis carbon in the skin will induce extra twist and alleviate load.…”
Section: Instructionmentioning
confidence: 99%