小展弦比飞机非线性气动特性风洞与飞行相关性研究

在较大迎角范围，如何由风洞试验数据预计全尺寸小展弦比飞机的非线性气动特性，并与飞行值相关，始终是国际航空界致力解决的重大问题，本项研究采用风洞试验与工程计算相结合的方法，对支架，洞壁、进气，喷流，雷诺数及静弹性等影响相关性的诸因素予以修正，并计及配平影响，从而比较准确地预计出全尺寸收音机的非线性气动特性，预计值与试飞值相比较结果验证了本项研究的可靠性和实用性。

The correlation study of nonlinear aerodynamic characteristics of aircrafts with low aspect ratio

Nowadays, high maneuverability increasingly a more important specification for modern fighter. For several decades, it has an arousing international common interest to predict the lift/drag flight conditions based on wind tunnel test data. Combining wind tunnel testing with analytical prediction, and applying the correction scheme established for aircraft with high swept angle and low aspect ratio, major effects including support interference, wall interference, propulsion and nozzle ejection effects, Reynolds number effects and static aeroelastic effects were corrected, With trimming effect being considered, aerodynamic characteristics of the full scale aircraft can be reliably predicted. The result of this study shows good agreement with the relevant flight test data.