基于CFD的不同小翼性能比较

8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING Pub Date : 2019-07-18 DOI:10.1063/1.5115907

Chowdhury Abid Mahmood, R. Das

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引用次数: 2

摘要

诱导阻力是飞机有限机翼产生的主要阻力之一。它是由于机翼上下部分的压力变化而产生的。这种阻力会导致更多的燃料消耗，降低飞机的速度和航程。小翼是一种通过减小机翼翼尖处的压力梯度来减小诱导阻力的翼尖装置。到目前为止，已经推出了几种类型的小翼。本文主要研究了矩形直翼不同类型小翼在亚音速巡航飞行条件下的性能。利用SolidWorks软件设计了NACA 2412翼型的矩形机翼和不同类型的小翼，并利用ANSYS Fluent软件对机翼模型进行了分析。在带小翼和不带小翼的不同迎角下，测量了升力系数、阻力系数和升阻比。然后对它们进行了比较。结果表明，与没有小翼的机翼模型相比，所有安装小翼的机翼模型都具有更高的升力系数、更低的阻力系数和更高的升阻比。斜翼小翼在低攻角时升阻比最佳，而45°斜角混合型小翼在大攻角时升阻比最高。诱导阻力是飞机有限机翼产生的主要阻力之一。它是由于机翼上下部分的压力变化而产生的。这种阻力会导致更多的燃料消耗，降低飞机的速度和航程。小翼是一种通过减小机翼翼尖处的压力梯度来减小诱导阻力的翼尖装置。到目前为止，已经推出了几种类型的小翼。本文主要研究了矩形直翼不同类型小翼在亚音速巡航飞行条件下的性能。利用SolidWorks软件设计了NACA 2412翼型的矩形机翼和不同类型的小翼，并利用ANSYS Fluent软件对机翼模型进行了分析。在带小翼和不带小翼的不同迎角下，测量了升力系数、阻力系数和升阻比。然后对它们进行了比较。结果表明，所有的小翼安装机翼模型都具有良好的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Performance comparison of different winglets by CFD

Induced drag is one of the major drag forces created in the finite wing of an aircraft. It is generated due to the pressure variation of the upper and lower portion of the wing. This drag leads to more fuel consumption and reduces speed and range of an aircraft. Winglet is a wingtip device which can reduce induced drag by reducing the pressure gradient at the wingtip of the wing. Several types of winglets have been introduced so far. The primary focus of this study is to investigate the performances of different types of winglets on a straight rectangular wing at subsonic cruise condition of flight. A rectangular wing of NACA 2412 airfoil and different types of winglets are designed by SolidWorks software and the wing models are analyzed by ANSYS Fluent software. Coefficients of lift, coefficients of drag and lift to drag ratios are measured at different angle of attacks of the wing with and without the winglets. Then comparison is carried out among them. It is found that all winglet mounted wing models provide higher lift coefficients, lower drag coefficients and higher lift to drag ratios than the wing model without winglet. Moreover, raked winglet yields the best lift to drag ratio at low angle of attacks but blended winglet with 45° cant angle provides the highest lift to drag ratio at high angle of attacks.Induced drag is one of the major drag forces created in the finite wing of an aircraft. It is generated due to the pressure variation of the upper and lower portion of the wing. This drag leads to more fuel consumption and reduces speed and range of an aircraft. Winglet is a wingtip device which can reduce induced drag by reducing the pressure gradient at the wingtip of the wing. Several types of winglets have been introduced so far. The primary focus of this study is to investigate the performances of different types of winglets on a straight rectangular wing at subsonic cruise condition of flight. A rectangular wing of NACA 2412 airfoil and different types of winglets are designed by SolidWorks software and the wing models are analyzed by ANSYS Fluent software. Coefficients of lift, coefficients of drag and lift to drag ratios are measured at different angle of attacks of the wing with and without the winglets. Then comparison is carried out among them. It is found that all winglet mounted wing models p...

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8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING

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