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| 1 | 大型水陆两栖飞机侧风起降的滑流影响分析显示文摘大型水陆两栖飞机AG600的动力装置为安装在机翼上的4台同向旋转涡轮螺旋桨发动机,针对1:15缩比模型带动力风洞试验显示的螺旋桨滑流对侧风起降状态的偏航力矩不稳定影响,对全机带动力风洞试验模型进行了大规模并行非定常数值计算,再现了风洞试验现象,通过流动机理分析明确其产生原因主要是左侧滑时右外翼分离和垂尾背鳍涡破裂,这些原因和数值模拟的准确性也为后期的风洞试验所证实。考虑到模型风洞试验中尺度限制造成的低雷诺数和高螺旋桨转速,为保证飞行安全,继续采用该非定常方法对全尺寸飞机真实侧风起降状态进行了详细数值分析和偏航稳定性评估。研究结果显示,在飞行雷诺数和螺旋桨转速下,相同侧风范围内风洞试验显示的流动不稳定因素基本消失,偏航稳定性允许的侧风范围明显增加。本研究实现了四发螺旋桨飞机起降状态横向气动特性的滑流影响非定常数值分析,建立了基于计算流体力学的风洞与飞行雷诺数效应的相互关系,进行了偏航稳定性的虚拟试飞评估,研究成果也为AG600飞机的首飞和飞行试验所验证。 | 钟敏 华俊 郑遂 白俊强 孙卫平 黄领才 | 2019 | 航空学报2019，40，1： | 3 |
| 2 | Wing optimization of propeller aircraft based on actuator disc method显示文摘Propeller aircraft are widely used in general aviation.The rotating propeller has a strong effect on the aerodynamic performance of the wing.This paper uses an actuator disc to model the effect of the propeller.A wing optimization method is developed with the actuator disc method.Several wing optimizations with different slipstream settings are studied.The twist angle and airfoils of the wing are used as the design variables.The results show that the propeller slipstream and slipstream directions have a strong influence on the optimization process.Powered-on optimization with a slipstream can obtain better drag reduction results than unpowered optimization.The drag decomposition results show that most of the drag reduction comes from the form drag reduction.The symmetric'inboard-up'slipstream configuration is found to have the highest lift-to-drag ratios,which are 18.87 for the twist angle optimization and 19.15 for the airfoil optimization. | Yifei ZHANG Haixin CHEN Yufei ZHANG | 2021 | Chinese Journal of Aeronautics2021，34，5： | 0 |
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