Design Method of Reaming Pneumatic Impactors Based on Its Cuttings Removal Performance

doi:10.12068/j.issn.1005-3026.2018.06.017

Abstract

Abstract: In order to improve the cuttings removal performance of reaming pneumatic impactors in hard layers， the computational fluid mechanics theory and Fluent simulation software were employed to find out a design method based on the critical velocity principle of cutting particles， which is related to the cuttings removal performance of reaming pneumatic impactors and then it was applied to the back-reaming pneumatic impactor. The speed distribution regularities of gas phase， the change of cutting particles’ velocity and trajectory， and the concentration distribution of cutting particles in the flow field of the back-reaming pneumatic impactor were obtained. The results showed that the cutting particles’ critical velocity of the back-reaming pneumatic impactor in the cuttings flow field is 6.02m/s. The design method related to cuttings removal performance can effectively strengthen the cuttings removal performance of the back-reaming pneumatic impactor， and the velocity of gas phase increases to 10m/s in the flow field. The time when cutting particles remain in the flow field is shortened， and the value of particle concentration distribution range in the flow field decreases from 0~100kg/m³ to 0~4kg/m³.

Key words: reaming pneumatic impactor, cuttings removal performance, design method, gas-solid two phase flow, numerical simulation

CLC Number:

TD 41

XU Hai-liang， ZHOU Yong-xing， XU Cong， ZHAO Hong-qiang. Design Method of Reaming Pneumatic Impactors Based on Its Cuttings Removal Performance[J]. Journal of Northeastern University Natural Science, 2018, 39(6): 844-849.

References

[1]Stidger R W.Technology:trenchless technology provides environmental advantages［J］.Gas Utility Manager，2002，47(1):18-19.
[2]Zwierzchowska A.The optimum choice of trenchless pipe laying technologies［J］.Tunnelling and Underground Space Technology，2006，6(6):696-699.
[3]Ariaratnam S T，Chan W，Choi D.Utilization of trenchless construction methods in mainland China to sustain urban infrastructure［J］.Practice Periodical on Structural Design and Construction，2006，11(3):134-141.
[4]Li J，Zhou M，Si Y N，et al.Trenchless repair technology and application of urban sewer system［J］.Applied Mechanics and Materials，2014，470:992-997.
[5]徐海良，赵宏强.一种反向冲击的气动冲击器:CN101666211［P］.2010-03-10.(Xu Hai-liang，Zhao Hong-qiang.Pneumatic impact device with reverse impact:CN101666211［P］.2010-03-10.)
[6]Liu G H，Song T Y，Li J.Analysis on cutting carrying capacity of gas in gas drilling for horizontal well［J］.Petroleum Drilling Techniques，2009，37(5):26-29.
[7]Wang K，Pan H，Liu Z.Numerical simulation on dense phase pneumatic conveying diversion characteristics in branch pipeline［J］.Science and Technology，2013，27 (3):303-308.
[8]徐海良，李峰，赵宏强，等.反向扩孔气动冲击器的计算机仿真与优化研究［J］.振动与冲击，2015，34(12):101-107.(Xu Hai-liang，Li Feng，Zhao Hong-qiang，et al.Optimization and simulation of reverse counterboring pneumatic impactor ［J］.Journal of Vibration and Shock，2015，34(12):101-107.)
[9]杨伦，谢一华.气力输送工程［M］.北京:机械工业出版社，2006.(Yang Lun，Xie Yi-hua.Pneumatic conveying engineering ［M］.Beijing:Machinery Industry Press，2006.)
[10]张兆顺，崔桂香，许春晓.湍流理论与模拟［M］.北京:清华大学出版社，2006.(Zhang Zhao-shun，Cui Gui-xiang，Xu Chun-xiao.Turbulence theory and simulation ［M］.Beijing:Tsinghua University Press，2006.)
[11]王雄，李德波，罗坤.圆孔射流近场湍流特性DNS与RANS模拟的对比研究［J］.能源工程，2010，30(5):1-6.(Wang Xiong，Li De-bo，Luo Kun.Comparison of DNS and RANS calculations of the round jet flow in the near field region ［J］.Energy Engineering，2010，30(5):1-6.)
[12]Xu H L，Li W，Zhao H Q，et al.Cuttings carrying characteristics of back-reaming pneumatic impactor exhaust during drilling operation［J］.Petroleum Exploration and Development，2016，43(1):131-137.

[1]	ZHU Qing-feng， YAN Bo， FENG Zhi-xin， ZUO Yu-bo. Numerical Simulation and Experimental Investigation on Hot Rolling Process of 2195 Aluminum Alloy at Different Speeds [J]. Journal of Northeastern University(Natural Science), 2023, 44(4): 502-509.
[2]	ZHAO Wen ， SUN Yuan， BAI Qian， XIA Yun-peng. Excavation Field Test and Parameters Optimization of the Transverse Pilot Tunnel with Small Diameter Tube Curtain Construction Method [J]. Journal of Northeastern University(Natural Science), 2023, 44(3): 432-439.
[3]	WU Fei， LI Yi-neng， WANG Meng-hui. Research on Light-Curing Assisted Molding Process of Extrusion-based Ceramic 3D Printing [J]. Journal of Northeastern University(Natural Science), 2022, 43(9): 1283-1290.
[4]	YUAN Yang， XU Tao， ZHOU Guang-lei， LE Zhi-hua. Simulation Method of Damage and Fracture for Brittle Rock Based on Microplane Model and Regularization [J]. Journal of Northeastern University(Natural Science), 2022, 43(8): 1141-1148.
[5]	LI Xue-jiao， YANG Hong-ying， ZHAO He-fei， HU Hong-sheng. Numerical Simulation Study on Gas Gathering Structure of Aluminum Reduction Cell [J]. Journal of Northeastern University(Natural Science), 2022, 43(7): 966-972.
[6]	LYU Chao， SUN Ming-he， YIN Hong-xin， LIU Fang. Simulation Study on the Effect of Venturi Pyrolysis Reactor Structure on Flow Field [J]. Journal of Northeastern University(Natural Science), 2022, 43(6): 821-826.
[7]	HOU Duan-xu， WEI De-zhou， CUI Bao-yu， ZHAO Qiang. Effect of Feed Concentration on Separation Performance of Cyclone Separation Column [J]. Journal of Northeastern University(Natural Science), 2022, 43(5): 718-723.
[8]	AN Long， ZHANG Jia-hua， LI Yuan-hui， HAN Lin. Simulation and Parameters Optimization of Medium Deep Hole Blasting in Steeply Narrow Vein Mine Under Confinement [J]. Journal of Northeastern University(Natural Science), 2022, 43(4): 567-574.
[9]	LI Bao-kuan， OU Hai-bin， YU Yang， LI Meng-zhen. An Coupled Model of Multiphysics and Selective Reduction in Titanium Slag EAF [J]. Journal of Northeastern University(Natural Science), 2022, 43(2): 206-213.
[10]	HAO Bo， DAI Hao， LUY Chao. Influence of Water Entry Angle on High-Speed Projectiles in the Water Entry Process [J]. Journal of Northeastern University(Natural Science), 2022, 43(2): 221-227.
[11]	ZHAO Meng， XIAO Ming， CHEN Jun-tao， ZUO Shuang-ying. Stability Analysis of Surrounding Rock of Underground Caverns Considering Contact State of Interbedded Layered Rock Mass [J]. Journal of Northeastern University(Natural Science), 2022, 43(2): 243-250.
[12]	WANG Xin， ZHAO Wen， BAI Qian. Expansion Type of In-situ Expansion of the Intersection Between Main Tunnel and Shaft in the Existing Tunnel [J]. Journal of Northeastern University(Natural Science), 2022, 43(10): 1469-1476.
[13]	ZHANG Xiao-hu， ZHANG Sheng， ZHAO Liang， DONG Hui. Numerical Analysis of Gas-Solid Heat Transfer Characteristics in Shaft Furnace for Calcination of Sintered Magnesia [J]. Journal of Northeastern University(Natural Science), 2022, 43(1): 40-47.
[14]	LI Gang， KANG Jin， CUI Zhen， HU Peng. Functional Experiment and Simulation Study of Explosion Isolation Flap Valves [J]. Journal of Northeastern University(Natural Science), 2021, 42(8): 1166-1173.
[15]	LI Tian-xiang， LI Hai-jun， WANG Zhao-dong， WANG Guo-dong. Numerical Simulation of Shrinkage Porosities and Surface Cracks of Slab with Hot-Core Heavy Reduction Rolling [J]. Journal of Northeastern University(Natural Science), 2021, 42(7): 913-919.