The Aircraft Noise Simulation Working Group (ANSWr) was established by DLR, ONERA, and NASA to compare simulation tools, establish guidelines for noise prediction, and assess uncertainties associated with the simulation. A benchmark test was initiated, and initial results for a reference and a low-noise vehicle are discussed. The reference aircraft is a conventional tube-and-wing configuration with the engines installed under the wings. The low-noise variant features a high wing design with engines mounted above the wing and fuselage junction. Simulations are performed for both departure and approach conditions, and the results obtained with the different system noise prediction tools are compared. For the reference aircraft, the overall agreement is good among the three predictions. Maximum A-weighted sound pressure levels received on the ground agree within 3–4 dB. For the low-noise vehicle, the comparison of the computed results focuses mainly on the acoustic shielding calculations, as well as on the noise source components. Considering these shielding effects, all three prediction methods show remarkable good agreement, with differences in maximum A-weighted sound pressure level typically lower than 4 dB. In conclusion, the results are quite promising. Despite simulation assumptions made to assist in the comparison, this work is a first and a positive step toward the development of a reliable and comprehensive comparison of these three aircraft noise simulation tools.

DLR，ONERA和NASA成立了飞机噪声模拟工作组（ANSWr），以比较模拟工具，建立噪声预测准则并评估与模拟相关的不确定性。启动了基准测试，并讨论了参考和低噪声车辆的初始结果。参考飞机是常规的管和机翼配置，发动机安装在机翼下方。低噪声变体采用高翼设计，发动机安装在机翼和机身交界处上方。对起飞和进场条件都进行了仿真，并比较了使用不同系统噪声预测工具获得的结果。对于参考飞机，三个预测之间的总体一致性良好。地面上接收到的最大A加权声压级在3-4 dB之内。对于低噪声车辆，计算结果的比较主要集中在声屏蔽计算以及噪声源组件上。考虑到这些屏蔽效应，所有三种预测方法均显示出显着的良好一致性，最大A加权声压级的差异通常低于4 dB。总之，结果是很有希望的。尽管进行了模拟假设以帮助进行比较，但这项工作是朝着对这三种飞机噪声模拟工具进行可靠而全面的比较发展的第一步，也是积极的一步。以及噪声源组件。考虑到这些屏蔽效应，所有三种预测方法均显示出显着的良好一致性，最大A加权声压级的差异通常低于4 dB。总之，结果是很有希望的。尽管进行了模拟假设以帮助进行比较，但这项工作是朝着对这三种飞机噪声模拟工具进行可靠而全面的比较发展的第一步，也是积极的一步。以及噪声源组件。考虑到这些屏蔽效应，所有三种预测方法均显示出显着的良好一致性，最大A加权声压级的差异通常低于4 dB。总之，结果是很有希望的。尽管进行了模拟假设以帮助进行比较，但这项工作是朝着对这三种飞机噪声模拟工具进行可靠而全面的比较发展的第一步，也是积极的一步。