Buffeting Prediction for Transport Aircraft Applications Based on Unsteady Pressure Measurements
Buffeting Prediction for Transport Aircraft Applications Based on Unsteady Pressure Measurements
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基于非定常压力测量的运输飞机应用的抖振预测
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
I. Legrain
中科院分区：
文献类型：
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作者：
B. Benoit;I. Legrain
在ONERA，正在开发一种抖振起始预测方法，该方法的基础是通过测量具有比例静态变形和几何形状的模型上的非定常压力场来计算飞机的动态响应。为了建立该方法，对RA 16 SC 1翼型和矩形机翼进行了详细的非定常分离流分析实验。观察到跨音速时存在有组织的分离流波动。但是，对于运输机来说，这种流动在抖振开始时似乎并不相关。根据更完整的非定常压力测量，还计算了1/38比例机翼模型的动态抖振响应。至少在跨音速时，得到了与实验结果相当一致的结果。
At ONERA a buffet onset prediction method based on computation of aircraft dynamic responses from the measurement of the unsteady pressure field on a model with scaled static deformation and geometry is under development. To build up such a method several experimental tests were performed on both RA16SC1 airfoil and rectangular wing to analyze in details unsteady separated flows. The existence of organized separated flow fluctuations at transonic speeds was observed. But this type of flow does not seem to be relevant at buffet onset for transport aircraft. Dynamic buffet responses have also been calculated on a 1/38 scale wing model from more complete unsteady pressure measurements. Reasonable agreement was obtained with experimental results at least for transonic speeds.