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Use of a Viscous Flow Simulation Code for Static Aeroelastic Analysis of a Wing at High-Lift Conditions

机译:粘性流动模拟代码在高起升条件下对机翼进行静态气动弹性分析的应用

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In this paper, we present a static aeroelastic analysis of a wind tunnel test model of a wing in high-lift configuration using a viscous flow simulation code. The model wing was tailored to deform during the tests by amounts similar to a composite airliner wing in high-lift conditions. This required use of a viscous flow analysis to predict the lift coefficient of the deformed wing accurately. We thus utilized an existing static aeroelastic analysis framework that involves an inviscid flow code (Cart3D) to predict the deformed shape of the wing, then utilized a viscous flow code (Overflow) to compute the aerodynamic loads on the deformed wing. This way, we reduced the cost of flow simulations needed for this analysis while still being able to predict the aerodynamic forces with reasonable accuracy. Our results indicate that the angle of attack of wing sections along the span decrease due to the induced washout deformation when the wing is aerodynamically loaded. While this induced washout decreases the lift until around an angle of attack of 16 degrees due to the reduction on angle of attack, it increases the lift at angles of attack more than 16 degrees by alleviating separation.
机译:在本文中,我们使用粘性流仿真代码对高升力机翼风洞测试模型进行了静态气动弹性分析。模型机翼经过调整后可以在测试过程中变形,其变形量与高升空条件下的复合客机机翼相似。这需要使用粘性流分析来准确预测变形机翼的升力系数。因此,我们利用了现有的静态气动弹性分析框架,该框架涉及不粘流体代码(Cart3D)来预测机翼的变形形状,然后利用粘性流体代码(Overflow)来计算变形机翼上的气动载荷。这样,我们降低了进行此分析所需的流动模拟的成本,同时仍然能够以合理的精度预测空气动力。我们的结果表明,当机翼受到空气动力载荷时,机翼部分沿跨度的迎角会由于感应冲刷变形而减小。尽管由于冲蚀角度的减小,这种冲刷会减小升程直到达到16度的迎角,但通过减轻分离度,它会在冲蚀角度使升程增加超过16度。

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