Wave Propagation in the Multilayered Low-pressure Near-space Atmosphere
Alternative TitleWOS:000510220100427
Li, Chao; Cui, Hanyin; Shen, Rushan1; Peng, Xiaodong2; Shen, Xuchen2; Hou, Yaqin3; Gao, Qinghua3; Wang, Jing3; Liu, Chun3; Guo, Quan4
AbstractThe variation of sound speeds of air and nitrogen gas at temperatures from 15 to -80 degrees C, and at gas pressures from 10(5) to 150 Pa have been measured in a KM2G space simulator. The objective is to provide the primary acoustic parameters to set up a proper multi-layered near-space atmosphere model, so that to simulate propagation paths of acoustic waves. From experimental data, sound speeds of both air and nitrogen gas decrease with the decreasing temperature from 15 to -80 degrees C and with the decreasing pressure from 10(5) to about 5000 Pa. However, sound speeds in the 15 degrees C rare air and nitrogen gas slightly increase with the dropping pressure below 5000 Pa, and this trend becomes more obviously when the temperature is low. This dispersion characteristic of acoustic wave in the near-space atmosphere should be considered during simulation of wave propagation.
Keywordsound speed low pressure dispersion rarefied gas SOUND SPEED
Conference NameIEEE International Ultrasonics Symposium (IUS)
Conference DateOCT 06-09, 2019
Conference PlaceGlasgow, ENGLAND
Indexed ByCPCI
Document Type会议论文
Affiliation1.Chinese Acad Sci, Inst Acoust, State Key Lab Acoust, Beijing, Peoples R China
2.Chinese Acad Sci, Univ Chinese Acad Sci, Inst Acoust, Beijing, Peoples R China
3.Chinese Acad Sci, Natl Space Sci Ctr, Beijing, Peoples R China
4.Beijing Inst Spacecraft Environm Engn, Beijing, Peoples R China
5.Chinese Earthquake Adm, Inst Crustal Dynam, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Li, Chao,Cui, Hanyin,Shen, Rushan,et al. Wave Propagation in the Multilayered Low-pressure Near-space Atmosphere[C],2019:1674-1677.
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