Explosion Behaviour of 30% Hydrogen/70% Methane-Blended Fuels in a Weak Turbulent Environment

Fu-Sheng Li, Guo-Xiu Li and Zuo-Yu Sun
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Fu-Sheng Li: School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Guo-Xiu Li: School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Zuo-Yu Sun: School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China

Energies, 2017, vol. 10, issue 7, 1-15

Abstract: In the present investigation the explosion characteristics of 30% H 2 /70% CH 4 -blended fuels have been experimentally studied in different turbulent environments. Some important indicators about the explosion characteristics, including maximum explosion pressure ( p max ), explosion duration ( t c ), maximum rate of pressure rise ((d p /d t ) max ), deflagration index ( K G ), and fast burn period ( t b ) have been studied. Furthermore, the influences of turbulent intensity associated with the equivalence ratio on explosion characteristics have been compressively analysed. The results indicated that, with the increase of turbulent intensity ( u’ rms ), the value of p max will be correspondingly raised while the equivalent ratio ( ? ) corresponding to the peak value of p max gradually changes from stoichiometric to 1.2. Based upon the value of p max in laminar condition, the growth extent of p max monotonically rises to u’ rms , but under a same u’ rms the growth extent of p max first declines and then rises with the increase of ? in the rage of 0.6 to 1.2. Under a laminar environment, the peak value of (d p /d t ) max is attained at ? = 1.0; although such a conclusion is maintained in the studied range of turbulent intensity, the difference on the value of (d p /d t ) max between ? = 1.0 and ? = 1.2 is obviously reduced with the increase of u’ rms . Meanwhile, from the variation of K G , it could be found that turbulence can raise the hazardous potential of disaster. With the increase of u’ rms , both the values of t c and t b reduce, the quota of t b in the explosion performs a similar regulation, but the detailed variation extent is also controlled by u’ rms .

Keywords: hydrogen/methane mixtures; turbulent explosion; explosion pressure; explosion duration; deflagration index. (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
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