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Indexed by:期刊论文

Date of Publication:2012-01-01

Journal:JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES

Included Journals:SCIE、EI、Scopus

Volume:25

Issue:1

Page Number:127-130

ISSN No.:0950-4230

Key Words:Methane; Coal dust; Hybrid explosion; Obstacles

Abstract:An experimental system including pressure transducer, data acquisition card, computer and electric spark ignition device was set up to research methane coal dust hybrid explosions in closed tubes with different types of obstacles inside. Its dynamic response time was less than a millisecond and the test precision was 0.1%. The experimental results show that the obstacles had great effects on the explosion characteristics in the tube. Hollow obstacles linked with inner wall of the tube induced faster pressure rising than installed center blocked solid obstacles. Obstacles with more sharp corner induce more violent explosions. The most dangerous explosion occurred when spacing between obstacles almost equaled the inner diameter of the tube for the same size obstacle. (C) 2011 Elsevier Ltd. All rights reserved.