程科;叶文华;冯阳;肖磊明;陈阳明;王一茹;
CHENG Ke;YE Wen-hua;FENG Yang;XIAO Lei-ming;CHEN Yang-ming;WANG Yi-ru;School of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics;School of Economics and Management, Nanjing University of Aeronautics and Astronautics;

• 1:南京航空航天大学机电学院
• 2:南京航空航天大学经济与管理学院

摘要(Abstract)：

为了研究破碎机内部锤轴转动对爆炸过程的影响,以常见的易燃、易爆气体甲烷作为模型气体,利用数值模拟软件Fluent模拟破碎机内的爆炸。采用滑移网格模型,从爆炸过程中压力变化、火焰扩散效应两个方面研究了锤轴转动对爆炸过程的影响。结果表明:锤轴转动对爆炸产生最大压力的影响可以忽略,但锤轴转速越快,达到最大压力的时间越短,最大压力上升速率越大;锤轴转速越快,破碎机内部气体流动越快,火焰扩散效应越明显,完成爆炸的时间越短。
In order to study the effect of the crusher's hammer shaft rotation on the explosion process, taking methane which is the common flammable and explosive gas as the model gas,the numerical simulation software Fluent is used to simulate the explosion inside the crusher.The sliding grid model is used to study the influence of the hammer shaft rotation on the methane explosion process from two aspects: pressure change during explosion and flame diffusion effect. The results show that the effect of the rotational speed of the hammer shaft on the maximum pressure generated by the explosion is negligible. However, the higher the rotational speed of the hammer shaft, the time to reach the maximum pressure is shorter, and the rising rate of maximum pressure is the greater.The higher the rotational speed of the hammer shaft, the gas inside the crusher flows is faster, the more obvious the flame diffusion effect, and the time to complete the explosion is shorter.

关键词(KeyWords)： 爆炸力学;破碎机锤轴转动;甲烷爆炸;Fluent软件;滑移网格
explosion mechanics;crusher's hammer shaft rotation;methane explosion;Fluent software;sliding grid model

Abstract:

Keywords:

基金项目(Foundation): 江苏省重点研发计划资助项目(BE2016758)

作者(Authors): 程科;叶文华;冯阳;肖磊明;陈阳明;王一茹;
CHENG Ke;YE Wen-hua;FENG Yang;XIAO Lei-ming;CHEN Yang-ming;WANG Yi-ru;School of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics;School of Economics and Management, Nanjing University of Aeronautics and Astronautics;

参考文献(References)：

• [1] 高强,张建华.破碎理论及破碎机的研究现状与展望 [J].机械设计,2009,26(10):72-75.GAO Q,ZHANG J H.Research status and prospect of broken theory and crusher [J].Mechanical Design,2009,26(10):72-75.
• [2] 宋协春,王东.废钢破碎机发展情况综述 [J].中国重型装备,2009,3(1):41-43.SONG X C,WANG D.Summary of development of scrap crusher [J].Chinese Heavy Equipment,2009,3(1):41-43.
• [3] 李伯奎,陈前亮,谷勇霞.单缸液压圆锥破碎机的现状及发展趋势 [J] .矿山机械,2006 (4):14 -15.LI B K,CHEN Q L,GU Y X.The current situation and development trend of single cylinder hydraulic cone crusher [J] .Mining Machine,2006 (4):14 -15.
• [4] 刘国杰.破碎理论及破碎机的研究现状与展望 [J].山西建筑,2016,42(21):212-213.LIU G J.Research status and prospect of broken theory and crusher [J].Shanxi Architecture,2016,42(21):212-213.
• [5] 罗振敏,王涛,程方明,等.小尺寸管道内二氧化碳抑制甲烷爆炸效果的实验及数值模拟 [J].爆炸与冲击,2015,35(3):393-400.LUO Z M,WANG T,CHENG F M,et al.Experimental and numerical simulation of carbon dioxide suppression of methane explosion in small-sized pipelines [J].Explosion and Shock Waves,2015,35(3):393-400.
• [6] 张凌新,胡龙兵,邵雪明.滑移网格下泵内流场的非定常流计算 [J].水动力学研究与进展,2013,28(1):10-16.ZHANG L X,HU L B,SHAO X M.Unsteady flow calculation of flow field in pump under slip grid [J].Hydrodynamic Research and Development,2013,28(1):10-16.
• [7] 汪家琼,蒋万明,孔繁余,等.固液两相流离心泵内部流场数值模拟与磨损特性 [J].农业机械学报,2013,44(11):53-60.WANG J Q,JIANG W M,KONG F Y,et al.Numerical simulation and wear characteristics of internal flow field in a solid-liquid two-phase centrifugal pump [J].Journal of Agricultural Machinery,2013,44(11):53-60.
• [8] 高飞飞,颜洪,基于滑移网格的螺旋桨滑流影响研究 [J].航空计算技术,2013,43(6):42-45.GAO F F,YAN H.Research on influence of propeller slip flow based on sliding grid [J].Aeronautical Computing Technology,2013,43(6):42-45.
• [9] 肖根福,刘国平,王俊亭,等.动网格在涡旋压缩机三维流场数值模拟中的应用 [J].流体机械,2014,42(1):25-29.XIAO G F,LIU G P,WANG J T,et al.Application of dynamic grid in numerical simulation of 3D flow field of scroll compressor [J].Fluid Machinery,2014,42(1):25-29.
• [10] 傅德彬,姜毅.用动网格方法模拟导弹发射过程中的燃气射流流场 [J].宇航学报,2007,28(2):423-426.FU D B,JIANG Y.Simulation of gas jet flow field during missile launch by dynamic mesh method [J].Journal of Astronautics,2007,28(2):423-426.
• [11] 杨康,项松,刘远强,等.基于MRF模型的旋翼桨叶气动特性分析与试验 [J].实验力学,2017,32(6):859-864.YANG K,XIANG S,LIU Y Q,et al.Analysis and test of aerodynamic characteristics of rotor blade based on MRF model [J].Experimental Mechanics,2017,32(6):859-864.
• [12] BENEDETTO A D,SARLI V D,SALZANO E,et al.Explosion behavior of CH4 /O2 /N2 /CO2 and H2 /O2 /N2 /CO2 mixtures [J].International Journal of Hydrogen Energy,2009,34(16):6 970-6 978.
• [13] 陈鹏,李艳超,黄福军,等.方孔障碍物对瓦斯火焰传播影响的实验与大涡模拟 [J].爆炸与冲击,2017,37(1):21-25.CHEN P,LI Y C,HUANG F J,et al.Experiment and large eddy simulation of influence of square hole obstacle on gas flame propagation [J].Explosion and Shock Waves,2017,37(1):21-25.
• [14] IBRAHIM S S,MASRI A R.The effects of obstructions on overpressure resulting from premixed flame deflagration [J].Journal of Loss Prevention in the Process Industries,2001,14(3):213-221.
• [15] 洪溢都,林柏泉,朱传杰.开口型管道内瓦斯爆炸冲击波动压的数值模拟 [J].爆炸与冲击,2016,36(2):198-209.HONG Y D,LIN B Q,ZHU C J.Numerical simulation of shock fluctuation pressure of gas explosion in open pipe [J].Explosion and Shock Waves,2016,36(2):198-209.