Recent Sonic Boom Propagation Studies at Gulfstream Aerospace
Recent Sonic Boom Propagation Studies at Gulfstream Aerospace
复制标题
湾流航空航天公司最近的音爆传播研究
DOI：
10.2514/6.2009-3388
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
J. Salamone
中科院分区：
文献类型：
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作者：
J. Salamone
本文总结了湾流航空航天公司最近进行的传播研究，从安静的超音速喷气机在稳定，水平飞行传播的声学特征。本文介绍的数据包括大气变化如何影响声学特征的传播，这些特征的形成是由于湾流安静尖峰而实现的。两种不同的飞行器配置通过各种各样的非标准大气条件进行传播。该研究的结果表明，湾流形状的特征显示出4至10 dB之间的响度水平的季节和地理变化，其中大部分响度变化比标准大气的水平更安静。此外，本文还提供了如果超音速公务机被允许在人口稠密地区上空飞行，美国大陆每天可能发生的这些安静声学特征的估计数。对发生次数的估计表明，美国大陆的大部分地区每天将受到来自主声毯的两个或更少的声学特征的影响。
This paper summarizes recent propagation studies conducted at Gulfstream Aerospace for acoustic signatures propagated from quiet supersonic jets in steady, level flight. Data presented in this paper includes how atmospheric variability influences the propagation of acoustic signatures whose shaping features were achieved due to the Gulfstream Quiet Spike. Two different vehicle configurations were propagated through a wide variety of non-standard atmospheric conditions. Results from that study show that Gulfstream shaped signatures exhibit seasonal and geographic variations in loudness levels between 4 to 10 dB with most of the loudness variation being quieter than the level for the standard atmosphere. Additionally, this paper provides estimates for the number of these quiet acoustic signatures per day that might occur on the continental U.S. if supersonic business jets were permitted to operate over populated areas. Estimates for the number of occurrences show that most of the continental United States would be exposed to two or less acoustic signatures per day from the primary acoustic carpet.