A summary is provided for the Second AIAA Sonic Boom Workshop held 8-9 January 2017 in conjunction with AIAA SciTech 2017. The workshop used three required models of increasing complexity: an axisymmetric body, a wing body, and a complete configuration with flow-through nacelle. An optional complete configuration with propulsion boundary conditions is also provided. These models are designed with similar nearfield signatures to isolate geometry and shock/expansion interaction effects. Eleven international participant groups submitted nearfield signatures with forces, pitching moment, and iterative convergence norms. Statistics and grid convergence of these nearfield signatures are presented. These submissions are propagated to the ground, and noise levels are computed. This allows the grid convergence and the statistical distribution of a noise level to be computed. While progress is documented since the first workshop, improvement to the analysis methods for a possible subsequent workshop are provided. The complete configuration with flow-through nacelle showed the most dramatic improvement between the two workshops. The current workshop cases are more relevant to vehicles with lower loudness and have the potential for lower annoyance than the first workshop cases. The models for this workshop with quieter ground noise levels than the first workshop exposed weaknesses in analysis, particularly in convective discretization.
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机译：提供了与AIAA SciTech 2017一起于2017年1月8日至9日举行的第二届AIAA Sonic Boom讲习班的摘要。讲习班使用了三种要求的复杂性不断提高的模型：轴对称体，机翼体和具有流通功能的完整配置机舱。还提供了带有推进边界条件的可选完整配置。这些模型设计有类似的近场特征，以隔离几何形状和冲击/扩展相互作用效应。 11个国际参与者团体提交了具有力量，俯仰力矩和迭代收敛准则的近场签名。介绍了这些近场签名的统计数据和网格收敛性。这些信息被传播到地面，并计算出噪声水平。这允许计算网格收敛和噪声水平的统计分布。自第一次研讨会以来已记录了进展情况，但为可能的后续研讨会提供了分析方法的改进。带有流通式机舱的完整配置显示了这两个车间之间最显着的改进。与第一个讲习班案例相比，当前的讲习班案例与响度较低的车辆更相关，并且可能会降低烦人的可能性。与第一个讲习班相比，该讲习班的模型具有比第一个讲习班更安静的地面噪声水平，这暴露了分析中的弱点，特别是在对流离散化方面。
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