三种大气模型模拟 X-59 音爆和传统音爆在全球传播的情况

W. Doebler, V. Sparrow
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引用次数: 0

摘要

在固定地点通过大气数据对超音速飞机产生的音爆进行传播模拟,为评估不同气候区域的噪声暴露统计数据提供了机会。了解基于气候的音爆噪声暴露统计差异对于确保未来民用超音速飞机噪声认证标准在全球范围内适用和有效非常重要。在本报告中,美国宇航局 X-59 Quesst 静音超音速飞机和传统超音速飞机产生的模拟音爆利用 PCBoom 通过全球 100 个地点的大气数据进行传播。噪声暴露统计数据与三个不同大气数据库(诺阿全球预报系统、诺阿气候预报系统第 2 版和 ECMWF 再分析第 5 版)的传播结果进行了比较。之所以选择这些大气模型,是因为它们的全球覆盖范围、受欢迎程度和数据库可用性。初步统计模型用于评估飞行方向、季节、地面高度和气候等因素对噪声暴露规模和响度的影响。确定了因气候而普遍存在较高噪音的地区,这有助于为未来的超音速飞机噪音标准提供信息。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Simulations of X-59 sonic thumps and traditional sonic booms propagated around the world for three atmospheric models
Propagation simulations of sonic booms from supersonic aircraft through atmospheric data over time at fixed locations provide the opportunity to assess noise exposure statistics for different climate regions. Knowledge of climate-based differences in sonic boom noise exposure statistics is important to ensure that future civil supersonic aircraft noise certification standards are globally applicable and effective. In this presentation, simulated sonic booms from the NASA X-59 Quesst quiet supersonic aircraft and conventional supersonic aircraft were propagated through atmospheric data at 100 locations across the world using PCBoom. Noise exposure statistics are compared for propagation results from three different atmospheric databases (NOAA Global Forecast System, NOAA Climate Forecast System Version 2, and the ECMWF Reanalysis Version 5). These atmospheric models were chosen due to their global coverage, popularity, and database availability. Preliminary statistical models are fit to assess the impact of several factors including flight direction, season, ground elevation, and climate on noise exposure size and loudness. Areas with prevalence of higher noise due to their climate are identified, which could help inform future supersonic aircraft noise standards.
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