Indoor Test System for Liquid CO2 Phase Change Shock Wave Pressure with PVDF Sensors
点击次数：
影响因子：
3.27
DOI码：
10.3390/s20082395
发表刊物：
SENSORS
关键字：
PVDF sensors; test system; liquid CO2 phase change; shock wave pressure test
摘要：
Liquid carbon dioxide phase change fracturing technology (LCPCFT) has been widely
used in engineering blasting due to the advantage of no flames, and no toxic and harmful gas.
However, few studies have been conducted on the acquisition of shock wave pressure and its loading
characteristics, which are key parameters in fracturing. Referring to the CO2 in-situ fracturing
technology, an indoor test system for shock wave pressure generated during LCPCFT has been
built, with a protected polyvinylidene fluoride (PVDF) piezoelectric sensor. Then three verification
experiments with different radial distances between the fracturing tube and test points were carried out
on the test system, and in each experiment, four PVDF sensors as four test points were arranged with
different axial distance from the detonating point to test the pressure distribution. The experimental
results show that when the radial distance between the fracturing tube and test points is not too large
(≤345 mm), the pressure generated during LCPCFT is approximately uniformly distributed within
the axial length of the fracturing tube, but when it is relatively large (≈895 mm), the results between
different test points are in a certain degree of dispersion. And finally, this paper uses the intraclass
correlation coefficient (ICC) and coefficient of variation (CV) of peak pressure and impulse to process
the test results to evaluate the reliability and stability of the test system. Evaluation results show that
the test results are in good consistency. The test system in this paper has good stability and high
reliability. The test system provides a useful tool for accurately obtaining the shock wave pressure,
which is helpful for further research on LCPCFT.
论文类型：
期刊论文
学科门类：
电子科学与技术
文献类型：
J
卷号：
20
期号：
2395
页面范围：
1-15
ISSN号：
1424-8220
是否译文：
否
收录刊物：
SCI
学位：博士学位
职称：教授
学科：安全科学与工程. 土木工程. 矿业工程
所在单位：资源与安全工程学院