工程科学学报2016，Vol.38Issue(11)：1522-1531,10.DOI:10.13374/j.issn2095-9389.2016.11.003
甲烷预混气螺旋爆轰的定量不稳定性研究
Quantitative irregularity analysis for spinning detonation of premixed CH4+2 O2
摘要
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.关键词
甲烷/爆轰/定量分析/不规则性/图像处理/自相关Key words
methane/detonation/quantitative analysis/irregularities/image processing/autocorrelation分类
矿业与冶金引用本文复制引用
赵焕娟,John H. S. LEE,张英华..甲烷预混气螺旋爆轰的定量不稳定性研究[J].工程科学学报,2016,38(11):1522-1531,10.基金项目
国家自然科学基金资助项目(E041003) （E041003）
中央高校基本科研业务费专项资金资助项目(FRF-TP-15-105A1) （FRF-TP-15-105A1）
中国博士后科学基金资助项目(2015M580049) （2015M580049）
国家自然科学基金青年科学基金资助项目(E11602017) （E11602017）
