MEASUREMENT OF THE VELOCITY OF PULSED PLASMA FLOW AT THE PW-7 INSTALLATION
PW-7 ҚОНДЫРҒЫСЫНДАҒЫ ИМПУЛЬСТІК ПЛАЗМАЛЫҚ АҒЫННЫҢ ЖЫЛДАМДЫҒЫН ӨЛШЕУ
ИЗМЕРЕНИЕ СКОРОСТИ ИМПУЛЬСНОГО ПЛАЗМЕННОГО ПОТОКА НА УСТАНОВКЕ PW-7
Tazhen A.B. Dosbolayev M.K. Pshikov M.I. Usenov E.A. Ramazanov T.S.
2024Kazakh-British Technical University
Herald of the Kazakh British Technical UNiversity
2024#21Issue 3273 - 280 pp.
The paper considers two independent methods for measuring the velocity of the plasma flow generated in the PV-7 pulsed plasma accelerator: a method based on observation and evaluation of the Doppler shift of spectral lines, and a method of high-speed visualization of plasma motion. To record the plasma flow radiation spectrum, a monochromator M833 was used. High-speed video recording was carried out at 640,000 fps using a Phantom VEO710S CMOS camera. The results of measurements of the average flow velocity obtained at a working gas pressure of 2⋅10-2 Torr, capacitance and voltage of the capacitor bank of 400 μF and 4 kV are presented. The results obtained by two independent methods were compared with each other. Argon was used as the working gas in the experiments. It is shown that the value of the plasma flow velocity estimated by the first method is 12.5 m/s, and the value of the plasma flow velocity estimated by the second method is 16.7 m/s. From these data the measured flow velocity values have a small discrepancy. Thus, it has been established that high-speed video recording and Doppler shift methods make it possible to obtain comparable estimates of flow velocity within the measurement errors. Determining the magnitude of the plasma flow velocity is of great practical importance.
Doppler shift , high-speed video recording , plasma flow , pulsed plasma accelerator
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Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
Department of Mechanical and Aerospace Engineering, Princeton University, 08540, NJ, United States
Al-Farabi Kazakh National University
Department of Mechanical and Aerospace Engineering
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