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Summary of Propagation Cases of the Second AIAA Sonic Boom Prediction Workshop

机译：第二届AIAA音爆预测研讨会传播案例摘要

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摘要

A summary is provided for the propagation portion of the second AIAA Sonic Boom Prediction Workshop, held 8 January 2017 in conjunction with the AIAA SciTech 2017 Conference. Near-field pressure waveforms for two cases were supplied, and ground signatures at multiple azimuthal angles as well as their corresponding loudness metrics were requested from 10 participants, representing three countries. Each case had some required as well as some optional runs. The required cases included atmospheric profiles with measured data including winds, using radiosonde balloon data at multiple geographically spread locations. The humidity profiles provided for the optional cases were taken from American National Standards Institute guidance. Participants provided ground signatures along with the requested data, including some loudness metrics using their best practices, which included lossy as well as lossless atmospheric propagation schemes. All the participants' submissions, for each case, are compared and discussed. Noise or loudness measures are calculated, and detailed comparisons and statistical analyses are performed and presented. It has been observed that the variation in the loudness measures and spread between participants' submissions increased as the computation proceeded from undertrack locations toward the lateral cutoff. Lessons learned during this workshop are discussed, and recommendations are made for potential improvements and possible subsequent workshops.
机译：提供了第二届AIAA Sonic Boom预测研讨会的传播部分的摘要，该研讨会于2017年1月8日与AIAA SciTech 2017大会同期举行。提供了两种情况的近场压力波形，并从代表三个国家的10个参与者处请求了多个方位角的地面信号及其相应的响度度量。每个案例都有一些必需的运行以及一些可选的运行。所需的案例包括在多个地理分布位置使用探空仪气球数据采集的包括风在内的大气数据。为可选情况提供的湿度曲线取自美国国家标准协会的指导。参与者提供了地面签名以及所要求的数据，包括使用其最佳实践的一些响度度量，包括有损和无损大气传播方案。对每种情况下所有参与者的陈述进行比较和讨论。计算噪声或响度度量，并进行详细的比较和统计分析并显示。已经观察到，随着计算从轨道下位置向侧向截止进行，响度量度的变化和参与者提交内容之间的差异增加。讨论了在该研讨会上吸取的经验教训，并提出了可能的改进建议和可能的后续研讨会。

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  • 来源
    《Journal of Aircraft》 |2019年第3期|876-895|共20页
  • 作者

    Rallabhandi Sriram K.; Loubeau Alexandra;

  • 作者单位

    NASA, Langley Res Ctr, Aeronaut Syst Anal Branch, Syst Anal & Concepts Directorate MS 442, Hampton, VA 23681 USA;

    NASA, Langley Res Ctr, Struct Acoust Branch, Res Directorate MS 463, Hampton, VA 23681 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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