An experimental study on temperature field evolution of carbon dioxide blasting jets

NI Hao; YANG Renshu; TAN Zhuoying; DING Chenxi; LIN Hai; WANG Yu; WU Haotian

doi:10.11883/bzycj-2023-0227

Volume 43 Issue 12

Dec. 2023

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NI Hao, YANG Renshu, TAN Zhuoying, DING Chenxi, LIN Hai, WANG Yu, WU Haotian. An experimental study on temperature field evolution of carbon dioxide blasting jets[J]. Explosion And Shock Waves, 2023, 43(12): 123902. doi: 10.11883/bzycj-2023-0227

Citation:

NI Hao, YANG Renshu, TAN Zhuoying, DING Chenxi, LIN Hai, WANG Yu, WU Haotian. An experimental study on temperature field evolution of carbon dioxide blasting jets[J]. Explosion And Shock Waves, 2023, 43(12): 123902. doi: 10.11883/bzycj-2023-0227

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An experimental study on temperature field evolution of carbon dioxide blasting jets

doi: 10.11883/bzycj-2023-0227

NI Hao^{1, 2
,},
YANG Renshu^{1
,
,},
TAN Zhuoying¹,
DING Chenxi¹,
LIN Hai¹,
WANG Yu¹,
WU Haotian¹

1.
School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
2.
China Coal Research Institute Company Limited, Beijing 100013, China

Received Date: 2023-06-29
Rev Recd Date: 2023-10-06

Available Online: 2023-10-08

Publish Date: 2023-12-12

Abstract

Abstract

In order to study the evolution law of the temperature field of carbon dioxide blasting jet, an infrared thermal imaging test system of carbon dioxide blasting was constructed, which enabled the space development and temperature evolution of the carbon dioxide blasting jet being analyzed through carbon dioxide blasting experiment. This paper will first introduce the principle of carbon dioxide blasting technology and the structure of carbon dioxide blasting device, and expound the physical properties of carbon dioxide. Through the operation of Span-Wagner equation of state, the relationship between temperature and pressure of carbon dioxide is revealed, and then the temperature-pressure relationship curve is drawn. Secondly, the evolution cloud map of jet temperature field is analyzed, showing that before the overtemperature phenomenon, the temperature gradient of the jet is the highest in the outer ring, slightly lower in the inner ring, and the lowest in the core region. While overtemperature occurs, the temperature gradient of the carbon dioxide jet is the lowest in the outer ring, slightly higher in the inner ring, and the highest in the core region. Therefore, the ambient temperature around the jet decreases first and then increases during the carbon dioxide explosion. Finally, the temperature-time curve of the jet is studied. One the one hand, the higher the initial discharge pressure, the higher the peak temperature of the carbon dioxide blasting jet, and the longer the time required to reach the peak temperature, with the highest temperature in the test reaching 133.7 ℃. While the lower the initial energy release pressure, the lower the temperature valley value, the shorter the time required to reach the temperature valley value, with the lowest temperature in the test being −3.4 ℃. On the other hand, the peak of jet temperature basically appears in the initial stage of blasting energy discharge, and then the temperature rises slightly, followed by the temperature drop to the valley value. The main stage of jet heating is in the pipe, and the study shows that the temperature of carbon dioxide blasting jet generally presents a trend of first rising followed by decreasing.
- carbon dioxide,
- jet,
- temperature field,
- infrared thermal imaging,
- equation of state

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References(36)

References

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