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計(jì)算模型維數(shù)對(duì)風(fēng)力機(jī)翼型氣動(dòng)性能預(yù)測的影響
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國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)資助項(xiàng)目(2007CB714605)


Effects of the Calculation Models with Different Dimension on the Aerodynamic Performance Prediction for Wind Turbine Airfoil
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    摘要:

    為了研究二維與三維計(jì)算對(duì)風(fēng)力機(jī)翼型氣動(dòng)性能預(yù)測的影響，采用數(shù)值求解N-S方程的方法，對(duì)DU93-W-210二維翼型和三維直葉片進(jìn)行了數(shù)值模擬，并將氣動(dòng)性能的計(jì)算結(jié)果與實(shí)驗(yàn)值進(jìn)行比較。結(jié)果表明：當(dāng)翼型表面氣流未發(fā)生分離時(shí)，二維翼型與三維直葉片周圍的流場結(jié)構(gòu)相同，二者之間的氣動(dòng)性能無明顯差異,，三維直葉片可被簡化為二維翼型；當(dāng)氣流分離時(shí),，三維直葉片周圍的流場結(jié)構(gòu)具有明顯的三維流動(dòng)效果,，氣動(dòng)性能更接近實(shí)驗(yàn)值，三維直葉片不能簡化為二維翼型,，而且三維直葉片的展向長度不宜過小,，取2～4倍弦長為最佳。

    Abstract:

    In order to analyze the influence of different dimensions on aerodynamic performance prediction of wind turbine airfoil, the flow fields surrounding 2-D airfoil of DU93-W-210 and 3-D straight blade were simulated by solving the N-S equations. Experimental results were compared to predict aerodynamic performances. The results revealed that if the flow did not separate, the aerodynamic performance and streamline between the 2-D airfoil and 3-D straight blade were similar, and the 3-D straight blade could be simplified into 2-D airfoil. If it separated, the flow field of 3-D straight blade had significant 3-D flow effects, the predicted aerodynamic performance was closer to experimental value than 2-D airfoil, but the 3-D straight blade could not be simplified into 2-D airfoil. The best span wise length of 3-D straight blade was 2~4 times of the chord.

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李銀然,李仁年,王秀勇,李德順.計(jì)算模型維數(shù)對(duì)風(fēng)力機(jī)翼型氣動(dòng)性能預(yù)測的影響[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2011,42(2):115-119. Li Yinran, Li Rennian, Wang Xiuyong, Li Deshun. Effects of the Calculation Models with Different Dimension on the Aerodynamic Performance Prediction for Wind Turbine Airfoil[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(2):115-119.

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