Measurement of Velocity and Pressure of Gases in Rocket Flames by Spectroscopic Methods
作者:
F. P. Bundy,
H. M. Strong,
A. B. Gregg,
期刊:
Journal of Applied Physics
(AIP Available online 1951)
卷期:
Volume 22,
issue 8
页码: 1069-1077
ISSN:0021-8979
年代: 1951
DOI:10.1063/1.1700103
出版商: AIP
数据来源: AIP
摘要:
A method for measuring the gas flow velocity in hot high velocity exhaust flames is described. This method is based on the doppler shift of wavelength of the sodium or lithium spectral radiation from the flame when viewed at different angles relative to the flame axis. The same apparatus may be used to measure the gas pressure from the pressure shift of wavelength of the sodium radiation. A Fabry‐Perot interferometer and camera assembly was used to determine the small shift in wavelengths. It was concluded that the absolute accuracy of any one velocity measurement by this method is about ±1.5×104cm/sec, while that of any one pressure measurement is about ±0.3 atmosphere. The method is therefore applicable to flames of very high velocity and to pressures of at least a few atmospheres.
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