Interferometric Rayleigh scattering diagnostic technique for the time-resolved measurement of flow velocity is studied. Theoretically, this systematic velocity-measured accuracy can reach up to 1.23 m/s. Measurement a...Interferometric Rayleigh scattering diagnostic technique for the time-resolved measurement of flow velocity is studied. Theoretically, this systematic velocity-measured accuracy can reach up to 1.23 m/s. Measurement accuracy is then evaluated by comparing with hot wire anemometry results. Moreover, the distributions of velocity and turbulence intensity in a supersonic free jet from a Laval nozzle with a Mach number of 1.8 are also obtained quantitatively. The sampling rate in this measurement is determined to be approximately 10 k Hz.展开更多
It has already been known by the meteorological community that MST radar is a powerful tool for wind profiling of the middle atmosphere.In fact,MST radar observation may also supply the temporal and spatial informatio...It has already been known by the meteorological community that MST radar is a powerful tool for wind profiling of the middle atmosphere.In fact,MST radar observation may also supply the temporal and spatial information of atmospheric turbulence in the middle atmosphere which is significant to our understanding the function and effect of turbulence in vertical transport of mass, energy,and momentum.Xianghe MST/ST radar was established in 1995 in its ST mode.This radar has the fast scanning ability which is favorable to reveal the structure of middle atmospheric turbulence.Preliminary results are described in this paper.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.11272337)
文摘Interferometric Rayleigh scattering diagnostic technique for the time-resolved measurement of flow velocity is studied. Theoretically, this systematic velocity-measured accuracy can reach up to 1.23 m/s. Measurement accuracy is then evaluated by comparing with hot wire anemometry results. Moreover, the distributions of velocity and turbulence intensity in a supersonic free jet from a Laval nozzle with a Mach number of 1.8 are also obtained quantitatively. The sampling rate in this measurement is determined to be approximately 10 k Hz.
文摘It has already been known by the meteorological community that MST radar is a powerful tool for wind profiling of the middle atmosphere.In fact,MST radar observation may also supply the temporal and spatial information of atmospheric turbulence in the middle atmosphere which is significant to our understanding the function and effect of turbulence in vertical transport of mass, energy,and momentum.Xianghe MST/ST radar was established in 1995 in its ST mode.This radar has the fast scanning ability which is favorable to reveal the structure of middle atmospheric turbulence.Preliminary results are described in this paper.
