| Citation: |
ZUO Weiqin，WU Shengjie，LIU Yanwei，et al. Experimental study on time-frequency characteristics of self-excited pulsed jet striking force in self-absorbing annular-air fluid type[J]. Coal Science and Technology，2025，53（4）：300−311. DOI: 10.12438/cst.2023-1680
|
In order to quantitatively analyze the striking force of self-absorbing annular-air fluidic self-excited pulsed jet, and to improve the impact performance of downward-facing orifice submerged water jets, a high-frequency striking force test system of pulsed jet was used to carry out striking force tests on self-absorbing annular-air fluidic self-excited pulsed jet nozzles, and pulsating pressure signals of jets were obtained. The time-frequency characteristics of the self-absorbing pulsed jet striking force were extracted by combining the Savitzky-Golay smoothed wavelet transform and the Wigner-Ville time-frequency distribution, and the effects of different cavity lengths, working pressures, and enclosing pressures on the time-frequency distribution of the self-absorbing pulsed jet striking force energy and pulsation characteristics were studied. The test results show that: the time-frequency of the self-absorbing pulse jet striking force generated by the device is mainly concentrated in the frequency band from 30 Hz to 50 Hz, the cavity length has a greater influence on the energy distribution of the self-absorbing pulse jet striking force, when the cavity length is 18.6 mm, the self-absorbing pulse jet striking force has the largest energy density, the energy distribution of the three-dimensional surface of the existence of obvious peaks, the jet pulsation is the best effect; the time-mean value and fluctuation of the striking force of self-absorbing pulse jet The time-averaged value, fluctuation size, frequency and total energy of the self-priming pulsed jet striking force increase with the increase of the working pressure, the larger the working pressure is, the higher the peak value of the wave peak of the three-dimensional surface of the energy distribution of the self-priming pulsed jet striking force is, the better the pulsation effect of the jet is; with the increase of the peripheral pressure, the self-priming pulsed jet striking force decreases in energy density, and the pulsation effect of the jet deteriorates, and the energy of the jet is drastically reduced in the case of the peripheral pressure is larger than 0.1 MPa, and the decrease is 47%. The energy of the jet is greatly reduced when the peripheral pressure is greater than 0.1 MPa, and the reduction range is between 47.14% and 62.96%. Comparative analysis with self-excited pulsed jet and ordinary jet under the test condition of peripheral pressure of 0.1 MPa shows that the pulsation peak value and the pulsation amplitude of self-absorbing pulsed jet are 1.15 times and 1.16 times of self-excited pulsed jet and 1.25 times and 2.7 times of ordinary jet, respectively, which indicates that self-absorbing pulsed jet can continuously generate more energy under the submerged condition. submerged condition can continuously produce a better pulse jet with good pulse characteristics. The time-frequency characterization of self-absorbing pulse jet can provide a new way to improve the impact performance of downward-facing hole submerged water jet.
| [1] |
卢义玉,黄杉,葛兆龙,等. 我国煤矿水射流卸压增透技术进展与战略思考[J]. 煤炭学报,2022,47(9):3189−3211.
LU Yiyu,HUANG Shan,GE Zhaolong,et al. Research progress and strategic thinking of coal mine water jet technology to enhance coal permeability in China[J]. Journal of China Coal Society,2022,47(9):3189−3211.
|
| [2] |
刘彦伟,贾浩杰,左伟芹,等. 基于有效分子自由程的纳米孔隙气体传输模型[J]. 中国矿业大学学报,2022,51(1):90−99. doi: 10.3969/j.issn.1000-1964.2022.1.zgkydxxb202201009
LIU Yanwei,JIA Haojie,ZUO Weiqin,et al. A model for gas transport through nanopores based on effective molecular free path[J]. Journal of China University of Mining & Technology,2022,51(1):90−99. doi: 10.3969/j.issn.1000-1964.2022.1.zgkydxxb202201009
|
| [3] |
王恩元,汪皓,刘晓斐,等. 水力冲孔孔洞周围煤体地应力和瓦斯时空演化规律[J]. 煤炭科学技术,2020,48(1):39−45.
WANG Enyuan,WANG Hao,LIU Xiaofei,et al. Spatio temporal evolution of geostress and gas field around hydraulic punching borehole in coal seam[J]. Coal Science and Technology,2020,48(1):39−45.
|
| [4] |
程小庆,王兆丰. 水力冲孔卸煤量对增透效果的影响[J]. 煤矿安全,2018,49(4):148−151.
CHENG Xiaoqing,WANG Zhaofeng. Influence of hydraulic punching coal unloading amount on permeability improvement[J]. Safety in Coal Mines,2018,49(4):148−151.
|
| [5] |
李英杰,倪婷,左建平,等. 坚硬顶板定向水力压裂裂纹起裂机制及影响因素分析[J]. 岩石力学与工程学报,2022,41(10):2015−2029.
LI Yingjie,NI Ting,ZUO Jianping,et al. Analysis of crack initiation mechanism and influencing factors of hard roofs due to directional hydraulic fracturing[J]. Chinese Journal of Rock Mechanics and Engineering,2022,41(10):2015−2029.
|
| [6] |
周雷,李立,夏彬伟,等. 含径向水力割缝钻孔导向压裂裂缝形态及影响要素[J]. 煤炭学报,2022,47(4):1559−1570.
ZHOU Lei,LI Li,XIA Binwei,et al. Fracture pattern and influencing factors of guided hydraulic fracturing with radial slot and well borehole[J]. Journal of China Coal Society,2022,47(4):1559−1570.
|
| [7] |
郭超奇,赵继展,李小建,等. 中硬低渗煤层定向长钻孔水力压裂瓦斯高效抽采技术与应用[J]. 煤田地质与勘探,2020,48(6):103−108,115. doi: 10.3969/j.issn.1001-1986.2020.06.014
GUO Chaoqi,ZHAO Jizhan,LI Xiaojian,et al. Technology and application of high efficiency gas extraction by directional long borehole hydraulic fracturing in coal seams of medium hardness and low permeability[J]. Coal Geology & Exploration,2020,48(6):103−108,115. doi: 10.3969/j.issn.1001-1986.2020.06.014
|
| [8] |
牟全斌,闫志铭,张俭. 煤矿井下定向长钻孔水力压裂瓦斯高效抽采技术[J]. 煤炭科学技术,2020,48(7):296−303.
MOU Quanbin,YAN Zhiming,ZHANG Jian. High efficiency gas drainage technology of hydraulic fracturing with directional long drilling in underground coal mine[J]. Coal Science and Technology,2020,48(7):296−303.
|
| [9] |
左伟芹,李运强,刘彦伟,等. 下向钻孔水渣输运机制与高效抽采试验研究[J]. 河南理工大学学报(自然科学版),2023,42(2):19−26. doi: 10.3969/j.issn.1673-9787.2023.2.jzgxyxb202302003
ZUO Weiqin,LI Yunqiang,LIU Yanwei,et al. Experimental study on water and slag transportation mechanism and high-efficiency extraction in downward boreholes[J]. Journal of Henan Polytechnic University (Natural Science),2023,42(2):19−26. doi: 10.3969/j.issn.1673-9787.2023.2.jzgxyxb202302003
|
| [10] |
童碧,王力. 下向穿层孔水力割缝施工工艺研究与应用[J]. 煤炭科学技术,2017,45(8):177−180,188.
TONG Bi,WANG Li. Study and application of hydraulic slotting construction technique with downward passed through strata borehole[J]. Coal Science and Technology,2017,45(8):177−180,188.
|
| [11] |
王希勇,熊继有,张艺瀚. 新型水力增压理论研究[J]. 天然气工业,2002,22(5):58−61,6. doi: 10.3321/j.issn:1000-0976.2002.05.016
WANG Xiyong,XIONG Jiyou,ZHANG Yihan. Theoritical study of novel hydraulic pressurizing device[J]. Natural Gas Industry,2002,22(5):58−61,6. doi: 10.3321/j.issn:1000-0976.2002.05.016
|
| [12] |
熊继有,付建红. 井下增压研究新进展[J]. 天然气工业,2003,23(6):91−93,182. doi: 10.3321/j.issn:1000-0976.2003.06.026
XIONG Jiyou,FU Jianhong. New progress of down-hole boosting research[J]. Natural Gas Industry,2003,23(6):91−93,182. doi: 10.3321/j.issn:1000-0976.2003.06.026
|
| [13] |
LIU Y W,JIA H J,ZUO W Q,et al. Methodology and performance of annular fluid enhanced self-excited oscillation in pulsed submerged waterjet for coal mine engineering[J]. Powder Technology,2024,435:119401. doi: 10.1016/j.powtec.2024.119401
|
| [14] |
庞惠文,艾白布·阿不力米提,解赤栋,等. 新型自激脉冲射流装置实验与现场应用[J]. 石油学报,2022,43(2):293−306. doi: 10.7623/syxb202202011
PANG Huiwen,AIBAIBU Abulimiti,XIE Chidong,et al. Experiment and field application of a new self-excitedpulsed jet device[J]. Acta Petrolei Sinica,2022,43(2):293−306. doi: 10.7623/syxb202202011
|
| [15] |
王 健,李江云,关 凯. 自激脉冲喷嘴装置试验研究[J]. 工程热物理学报,2014(4):4.
WANG Jian,LI Jiangyun,GUAN Kai. Experimental study of self-excited pulse nozzle device[J]. Journal of Engineering Thermophysics,2014(4):4.
|
| [16] |
赵礼,高传昌,刘新阳,等. 结构参数和运行参数对自激脉冲射流装置性能的影响试验[J]. 水利水电科技进展,2012,32(6):67−69,83. doi: 10.3880/j.issn.1006-7647.2012.06.017
ZHAO Li,GAO Chuanchang,LIU Xinyang,et al. Influences of structural and operating parameters on performance of self-excited pulse jet device[J]. Advances in Science and Technology of Water Resources,2012,32(6):67−69,83. doi: 10.3880/j.issn.1006-7647.2012.06.017
|
| [17] |
葛兆龙,周 哲,卢义玉,等. 影响自激振荡脉冲射流性能的喷嘴结构参数研究[J]. 四川大学学报(工程科学版),2013,5(5):160−165.
GE Zhaolong,ZHOU Zhe,LU Yiyu,et al. Study on the Nozzle Structure Parameters Affecting the Performance of Self-excited Oscillation Pulsed Jet[J]. Advanced Engineering Sciences,2013,5(5):160−165.
|
| [18] |
于晓龙,刘新阳,徐洪增,等. 水下自激吸气式脉冲射流装置瞬时冲击力分解[J]. 振动与冲击,2019,38(24):227−234,282.
YU Xiaolong,LIU Xinyang,XU Hongzeng,et al. Instantaneous impact force decomposition of underwater self-excited inspiration pulse jet device[J]. Journal of Vibration and Shock,2019,38(24):227−234,282.
|
| [19] |
刘新阳,朱安福,高传昌,等. 水下自激吸气式射流装置冲击力时频特性分析[J]. 振动与冲击,2016,35(24):213−220.
LIU Xinyang,ZHU Anfu,GAO Chuanchang,et al. Analysis of impact time-frequency characteristics for underwater self-excitation inspiration pulsed jet devices[J]. Journal of Vibration and Shock,2016,35(24):213−220.
|
| [20] |
刘彦伟,龙丽群,左伟芹,等. 环空流体强化自激脉冲淹没水射流调制与破煤特性[J]. 煤炭学报,2023,48(9):3393−3404.
LIU Yanwei,LONG Liqun,ZUO Weiqin,et al. Modulation of annular fluid enhanced self-excited pulsed water jet and its coal breaking characteristics[J]. Journal of China Coal Society,2023,48(9):3393−3404.
|
| [21] |
刘彦伟,左伟芹,韩红凯,等. 淹没脉冲射流脉冲参数测试装置及测试方法: ZL202210013751.1[P]. 2023−08−18.
|
| [22] |
唐永志,李平,朱贵旺,等. 超高压水力割缝技术在中等硬度低透气性煤层的应用[J]. 煤炭科学技术,2022,50(12):43−49.
TANG Yongzhi,LI Ping,ZHU Guiwang,et al. Application of ultra-high pressure hydraulic slotting technology in medium hardness and low permeability coal seam[J]. Coal Science and Technology,2022,50(12):43−49.
|
| [23] |
熊鹏,刘学朋,杜海曼,等. 基于平稳和连续小波变换融合算法的心电信号P,T波检测[J]. 电子与信息学报,2021,43(5):1441−1447. doi: 10.11999/JEIT200049
XIONG Peng,LIU Xuepeng,DU Haiman,et al. Detection of ECG signal P and T wave based on stationary and continuous wavelet transform fusion[J]. Journal of Electronics & Information Technology,2021,43(5):1441−1447. doi: 10.11999/JEIT200049
|
| [24] |
高传昌,胡一伟,李欢,等. 结构参数对自激脉冲射流特性影响的统计分析[J]. 排灌机械工程学报,2018,36(4):327−333.
GAO Chuanchang,HU Yiwei,LI Huan,et al. Statistical analysis of effects of structural parameters on characteristics of underwater self-excited pulse jet[J]. Journal of Drainage and Irrigation Machinery Engineering,2018,36(4):327−333.
|
Supported by: Beijing Renhe Information Technology Co., Ltd. 
DownLoad: