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CRM(Common Research Model)是第四届~第六届AIAA阻力预测研讨会(DPW)选择的参考外形。第四届和第五届DPW会议气动特性数值模拟结果的统计分析表明试验与计算之间存在明显差异。采用CFD方法和流固耦合(FSC)方法数值模拟了带支撑装置的CRM翼身组合体(CRM-WBS)构型的气动特性,以评估模型支撑装置和静气动弹性变形对CRM翼身组合体(CRM-WB)构型气动特性数值模拟结果的影响。通过与不包含支撑装置的CRM-WB构型的数值模拟结果和NASA Langley NTF风洞试验结果的对比分析,CRM-WBS构型的CFD计算结果表明,支撑装置导致机翼上翼面激波位置前移,升力系数、阻力系数、低头力矩系数下降。CRM-WBS构型的流固耦合计算结果表明,静气动弹性变形主要影响机翼上表面激波位置并显著降低外侧机翼激波位置前的负压值,进一步导致升力系数、阻力系数、低头力矩系数下降。包含支撑装置和静气动弹性变形的CRM-WB构型气动特性数值模拟结果更加接近试验结果。
The Common Research Model (CRM) is the reference profile for the fourth to the sixth AIAA Resistance Predictive Symposium (DPW) selection. The statistical analysis of the numerical results of the aerodynamic characteristics of the fourth and fifth DPW meetings showed that there was a clear difference between the test and the calculation. The CFD method and the fluid-structure interaction (FSC) method were used to simulate the aerodynamic characteristics of the CRM-WBS with support device to evaluate the effect of the model support device and static-dynamic elastic deformation on the structure of the CRM wing body assembly (CRM-WB) configuration aerodynamic characteristics of the numerical simulation results. The CFD results of the CRM-WBS configuration show that the support device causes the position of the shock wave on the wing upper airfoil to be compared with that of the NASA Langley NTF wind tunnel test through numerical simulation of the CRM-WB configuration without the support device Forward, lift coefficient, drag coefficient, bow torque coefficient decreased. The results of fluid-structure interaction in the CRM-WBS configuration show that the static aerodynamic elastic deformation mainly affects the location of the shock wave on the upper surface of the wing and significantly reduces the negative pressure value before the shock position of the outer wing, further resulting in the lift coefficient, the drag coefficient, Torque coefficient decreased. The results of numerical simulation of the aerodynamic characteristics of the CRM-WB configuration with supporting devices and static-dynamic elastic deformation are closer to the experimental results.