Microwave velocity interferometry for the parameter diagnosis of the interior ballistic of a two-stage light gas gun or powder gun

JIA Xing; TANG Longhuang; WENG Jidong; MA Heli; TAO Tianjiong; LIU Shenggang; CHEN Long; ZHANG Linwen; WANG Xiang

doi:10.11883/bzycj-2021-0303

Volume 42 Issue 3

Apr. 2022

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Article Navigation > Explosion And Shock Waves > 2022 > 42(3): 034101

CHEN Er-yun, MA Da-wei, LE Gui-gao, ZHAO Gai-ping, ZHU Sun-ke. Diffraction, reflection and focusing of toroidal shock waves[J]. Explosion And Shock Waves, 2009, 29(2): 177-181. doi: 10.11883/1001-1455(2009)02-0177-05

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JIA Xing, TANG Longhuang, WENG Jidong, MA Heli, TAO Tianjiong, LIU Shenggang, CHEN Long, ZHANG Linwen, WANG Xiang. Microwave velocity interferometry for the parameter diagnosis of the interior ballistic of a two-stage light gas gun or powder gun[J]. Explosion And Shock Waves, 2022, 42(3): 034101. doi: 10.11883/bzycj-2021-0303

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Microwave velocity interferometry for the parameter diagnosis of the interior ballistic of a two-stage light gas gun or powder gun

doi: 10.11883/bzycj-2021-0303

JIA Xing^{1, 2
,},
TANG Longhuang^{1, 2},
WENG Jidong^{1, 2},
MA Heli^{1, 2},
TAO Tianjiong^{1, 2},
LIU Shenggang^{1, 2},
CHEN Long^{1, 2},
ZHANG Linwen¹,
WANG Xiang^{1, 2
,
,}

1.
Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China
2.
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

Received Date: 2021-07-19
Rev Recd Date: 2021-09-08

Available Online: 2022-03-11

Publish Date: 2022-04-07

Abstract

Abstract

The measurement of the interior ballistic projectile velocity in a two-stage light gas gun or powder gun and the observation of the state of the precursor gas in the launch tube are very important for the design and calculation of the interior ballistic and for the analysis of the abnormal ballistic. In order to obtain the better results, two microwave interferometers in the Ka-band and X-band were designed by the Dopple principle, since the transmission and reflection characteristics of microwave are related with the caliber of launch tube and objects materials respectively. A combination of the short-time Fourier transform and phase calculation was used to process the interference signal, and then the velocity, acceleration, displacement, projectile bottom pressure and other information were obtained by calculation. Complete interior ballistic data for a two-stage light gas gun and a high-speed powder gun were obtained experimentally. The difference in the projectile velocity measured by the microwave interferometer and the optical beam blocking (OBB) device is less than 0.5%. Moreover, it was demonstrated in our experiments that under some conditions, shock waves may cause premature breaking of the diaphragm in the high pressure section, which results in the projectile having a secondary loading at high pressure, and then becoming fragmented with a probability. In addition, based on the reflection and transmission characteristics of the ionized gas at different microwave wavelengths, the velocity of the precursor H₂ gas in the launch tube of the two-stage light gas gun was measured using the X-band microwave interferometer for the first time, which can provide data for studying the temperature, pressure, ionization and other states of the high-speed ionized gas.
- microwave interferometer,
- two-stage gas gun,
- powder gun,
- velocity measurement,
- interior ballistic,
- precursor gas

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References(22)

References

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