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发表时间：2022-10-06

发表刊物：爆炸与冲击

所属单位：化工学院

期号：3

页面范围：447-452

ISSN号：1001-1455

摘要：An experimental circular pipeline with a length of 2 800 mm and a diameter of 50 mm was established to study the gaseous detonation propagation.Photodiode detectors were used to obtain the flame propagation velocity and the smoke film method to get the cellular structures.Polypropylene films with the blocking rate of 1.0 were set in the pipeline to investigate the characteristics of detonation velocity and cellular structures.Gaseous mixtures of C2 H2 + 2.5O2 diluted by argon in different volumes were used as experimental medium.The initial pressures varied in experiments.Results show that there are two different propagation forms after the detonation wave passes through the film obstacles,including velocity deficit and detonation failure.The propagation of gaseous detonation wave in blocked obstructions can be divided into three stages:stage of steady propagation,stage of velocity deficit or detonation failure and stage of overdriven detonation.

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