基于CFD的最优变后掠规律研究
发布时间：2018-09-14 11:33
【摘要】：为了探寻变后掠翼飞行器最佳后掠角的变化规律,基于计算流体力学计算技术,对变后掠翼身组合体进行了气动计算,结合遗传算法对计算结果进行全局寻优,探索最优变后掠规律。首先基于变后掠飞行器设计的要求与方法,建立了"旋转式"变后掠翼身组合体三维模型;其次通过在宽广速域绕流流场的CFD数值模拟,得到了气动数据;最后结合遗传算法对气动数据进行全局寻优,得出了升阻比最佳的后掠角变化规律。仿真结果表明,采用遗传算法对变后掠飞机最佳后掠角进行全局寻优,可以得到合理的最佳后掠角变化规律曲线:在亚声速速域内随着速度的增大,为了降低诱导阻力,提高升阻比,最优后掠角平缓增大;在跨声速速域内,为了延缓激波阻力的形成,最优后掠角急剧上升。
[Abstract]:In order to find out the change rule of the optimal sweep angle of VRP, based on the computational fluid dynamics (CFD) calculation technology, the aerodynamic calculation of the VRP wing assembly is carried out, and the global optimization of the calculation result is carried out by combining the genetic algorithm (GA). To explore the optimal law of backward sweep. Firstly, based on the design requirements and methods of VRP, a three-dimensional model of "rotary" variable swept wing is established, and then the aerodynamic data are obtained by CFD numerical simulation of the flow field around a wide speed range. Finally, the global optimization of aerodynamic data is carried out with genetic algorithm, and the rule of skimming angle with the best lift-to-drag ratio is obtained. The simulation results show that the optimal sweep angle curve can be obtained by using genetic algorithm for global optimization of the optimal sweep angle of a variable swept aircraft. In order to reduce the induced resistance, the optimal sweep angle curve can be obtained in the subsonic velocity domain with the increase of velocity. In order to delay the formation of shock resistance, the optimal back sweep angle rises sharply in the transonic velocity domain with the increase of lift-to-drag ratio.
【作者单位】： 上海航空测控技术研究所故障诊断与健康管理技术航空科技重点实验室;西安航空学院飞行器学院;
【基金】：航空科学基金资助(2011ZA56001)
【分类号】：V211.41
[Abstract]:In order to find out the change rule of the optimal sweep angle of VRP, based on the computational fluid dynamics (CFD) calculation technology, the aerodynamic calculation of the VRP wing assembly is carried out, and the global optimization of the calculation result is carried out by combining the genetic algorithm (GA). To explore the optimal law of backward sweep. Firstly, based on the design requirements and methods of VRP, a three-dimensional model of "rotary" variable swept wing is established, and then the aerodynamic data are obtained by CFD numerical simulation of the flow field around a wide speed range. Finally, the global optimization of aerodynamic data is carried out with genetic algorithm, and the rule of skimming angle with the best lift-to-drag ratio is obtained. The simulation results show that the optimal sweep angle curve can be obtained by using genetic algorithm for global optimization of the optimal sweep angle of a variable swept aircraft. In order to reduce the induced resistance, the optimal sweep angle curve can be obtained in the subsonic velocity domain with the increase of velocity. In order to delay the formation of shock resistance, the optimal back sweep angle rises sharply in the transonic velocity domain with the increase of lift-to-drag ratio.
【作者单位】： 上海航空测控技术研究所故障诊断与健康管理技术航空科技重点实验室;西安航空学院飞行器学院;
【基金】：航空科学基金资助(2011ZA56001)
【分类号】：V211.41
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