工程科学学报，第38卷，第11期：1522-1531,2016年11月 Chinese Journal of Engineering,Vol.38,No.11:1522-1531,November 2016 D0l:10.13374/j.issn2095-9389.2016.11.003:http://journals.ustb.edu.cn 甲烷预混气螺旋爆轰的定量不稳定性研究 赵焕娟”，John H.S.LEE2,张英华)区 1)北京科技大学土木与资源工程学院，北京1000832)麦吉尔大学机械工程系，蒙特利尔H3A2K6,加拿大 ☒通信作者，Emai:zyhustb@163.com 摘要针对CH:这种特别气体，对其实验结果运用数字化处理方法研究CH稳定性.在内径50.8mm圆形管道内获得 CH4+20,预混气在不同初始压力条件下的胞格爆轰结果并使用烟膜记录，且测得的平均爆轰速度数据与CJ爆轰速度接近， 在初始压力高于5kP妇时爆轰可稳定传播.烟膜上形成的三波点轨迹十分不规则.为减少人为误差，使用改进后的数字化处 理烟膜图像的技术方法，从烟膜轨迹中得出柱状图及自相关函数结果，发现CH+20,是一种爆轰十分不稳定的气体，并给 出CH4+202预混气的爆轰胞格尺寸及差距，结果显示人为测量结果偏大而数字化处理方法更为准确.这种方法能计算 CH4+20,预混气胞格尺寸及不稳定度，完善了定量化预混气不稳定程度的方法 关键词甲烷：爆轰：定量分析：不规则性：图像处理：自相关 分类号TD75 Quantitative irregularity analysis for spinning detonation of premixed CHa+20, ZHAO Huan-juan,John H.S.LEE2,ZHANG Ying-hua 1)School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)Department of Mechanical Engineering,McGill University,Montreal H3A 2K6,Canada Corresponding author,E-mail:zyhustb@163.com ABSTRACT CH is a typical and special detonation mixture.Based on the experimental method,digital image processing was performed to study the detonation stability theory of methane.A premixed CH+20 mixture was ignited in a tube with an inner diam- eter of 50.8 mm under different initial pressures.Smoked foils were used to record the cellular structure of spinning detonation.The average detonation velocity measured is similar with the CJ detonation velocity and it demonstrates that steady detonation happens when the initial pressure is higher than 5 kPa.The triple point trajectory leaves a very irregular pattern in smoked foils.In order to decrease human error,the digital processing technology was utilized and improved.The CH+20 mixture shows high degree of irregularity in the computation of histograms and the autocorrelation function.The cellular size and gap of the unstable premixed CH +20 were given.It is found that the results measured by digital image processing are accurate and by eyes are too big.The research can calculate the cellular size and the degree of instability of the unstable premixed CH.+202 and improves the quantitative irregular calculation method. KEY WORDS methane;detonation:quantitative analysis:irregularities:image processing:autocorrelation 爆轰波传播过程中借助燃烧释放的化学能实现自 持传播，爆轰波的这种自持燃烧特性可能给煤矿、石 收稿日期：20160105 基金项目：国家自然科学基金资助项目(E0410O3):中央高校基本科研业务费专项资金资助项目(FRF-TP4505A1):中国博士后科学基金资 助项目(2015M580049):国家自然科学基金青年科学基金资助项目(E11602017)工程科学学报，第 38 卷，第 11 期: 1522--1531，2016 年 11 月 Chinese Journal of Engineering，Vol． 38，No． 11: 1522--1531，November 2016 DOI: 10． 13374 /j． issn2095--9389． 2016． 11． 003; http: / /journals． ustb． edu． cn 甲烷预混气螺旋爆轰的定量不稳定性研究 赵焕娟1) ，John H． S． LEE2) ，张英华1)  1) 北京科技大学土木与资源工程学院，北京 100083 2) 麦吉尔大学机械工程系，蒙特利尔 H3A 2K6，加拿大  通信作者，E-mail: zyhustb@ 163． com 摘 要 针对 CH4 这种特别气体，对其实验结果运用数字化处理方法研究 CH4 稳定性． 在内径 50. 8 mm 圆形管道内获得 CH4 + 2O2 预混气在不同初始压力条件下的胞格爆轰结果并使用烟膜记录，且测得的平均爆轰速度数据与 CJ 爆轰速度接近， 在初始压力高于 5 kPa 时爆轰可稳定传播． 烟膜上形成的三波点轨迹十分不规则． 为减少人为误差，使用改进后的数字化处 理烟膜图像的技术方法，从烟膜轨迹中得出柱状图及自相关函数结果，发现 CH4 + 2O2 是一种爆轰十分不稳定的气体，并给 出 CH4 + 2O2 预混气的爆轰胞格尺寸及差距，结果显示人为测量结果偏大而数字化处理方法更为准确． 这种方法能计算 CH4 + 2O2 预混气胞格尺寸及不稳定度，完善了定量化预混气不稳定程度的方法． 关键词 甲烷; 爆轰; 定量分析; 不规则性; 图像处理; 自相关 分类号 TD75 Quantitative irregularity analysis for spinning detonation of premixed CH4 + 2O2 ZHAO Huan-juan1) ，John H． S． LEE2) ，ZHANG Ying-hua1)  1) School of Civil and Ｒesource Engineering，University of Science and Technology Beijing，Beijing 100083，China 2) Department of Mechanical Engineering，McGill University，Montreal H3A 2K6，Canada  Corresponding author，E-mail: zyhustb@ 163． com ABSTＲACT CH4 is a typical and special detonation mixture． Based on the experimental method，digital image processing was performed to study the detonation stability theory of methane． A premixed CH4 + 2O2 mixture was ignited in a tube with an inner diam￾eter of 50. 8 mm under different initial pressures． Smoked foils were used to record the cellular structure of spinning detonation． The average detonation velocity measured is similar with the CJ detonation velocity and it demonstrates that steady detonation happens when the initial pressure is higher than 5 kPa． The triple point trajectory leaves a very irregular pattern in smoked foils． In order to decrease human error，the digital processing technology was utilized and improved． The CH4 + 2O2 mixture shows high degree of irregularity in the computation of histograms and the autocorrelation function． The cellular size and gap of the unstable premixed CH4 + 2O2 were given． It is found that the results measured by digital image processing are accurate and by eyes are too big． The research can calculate the cellular size and the degree of instability of the unstable premixed CH4 + 2O2 and improves the quantitative irregular calculation method． KEY WOＲDS methane; detonation; quantitative analysis; irregularities; image processing; autocorrelation 收稿日期: 2016--01--05 基金项目: 国家自然科学基金资助项目( E041003) ; 中央高校基本科研业务费专项资金资助项目( FＲF-TP-15-105A1) ; 中国博士后科学基金资 助项目( 2015M580049) ; 国家自然科学基金青年科学基金资助项目( E11602017) 爆轰波传播过程中借助燃烧释放的化学能实现自 持传播，爆轰波的这种自持燃烧特性可能给煤矿、石