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论文类型：期刊论文

发表时间：2020-03-01

发表刊物：INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID

收录刊物：EI、SCIE

卷号：111

页面范围：159-167

ISSN号：0140-7007

关键字：R32/R1234ze(E); Limit oxygen content; Explosion pressure characteristics; Hydrodynamic instability; Laminar burning velocity

摘要：This paper is aimed at evaluating characteristics of R32/R1234ze(E) cloud explosion. The flame morphologies and explosion pressure are obtained experimentally and the laminar burning velocity is analyzed thermally and chemically. The results indicated that with the increase of equivalence ratio, the limiting oxygen content of x(E)=10% decreases monotonously, but the limiting oxygen content of x(E)=20% decreases firstly and then increases. The destabilization effect of hydrodynamic instability continues to reduce with the decrease of oxygen content. For various equivalence ratios and R1234ze (E) contents, a significant color difference is observed due to the formation of carbon particle and CH radical. As the oxygen content decreases, due to the decrease of laminar burning velocity, the maximum explosion pressure, maximum rate of pressure rise, positive pressure impulse and negative pressure impulse continue to decrease. The elementary reactions of greatly affecting laminar burning velocity are consisted of R1, R904, R925 and R963. (C) 2019 Elsevier Ltd and IIR. All rights reserved.