Experimental Study on Deflagrating  Characteristics of Nitromethane-aluminum Powder

doi:10.3969/j.issn.1000-1093.2018.01.012

Abstract

Abstract: The deflagrating characteristics of the gaseous nitromethane and the mixture of gaseous nitromethane and aluminum dust were test by using an explosion testing system in the 1 m³ closed explosion chamber. The explosion testing system includes pressure testing part and ignition energy testing part. The test results show that, within the experimental concentration range, the deflagration pressure and temperature increase with the increase in nitromethane content in the gaseous nitromethane and air mixture. Deflagration overpressure tends to be gentle in the gaseous nitromethane concentration of 40%-60%. The minimum ignition energy of 0.7 mJ can be obtained when the concentration of gaseous nitromethane is 20%-30%. Under the condition of weak ignition, an extreme point appears in the pressure of deflagration with the increase in the concentration of aluminum dust: the deflagration pressure is in the shape of upside-down U-shaped curve with the change in aluminum density, and the humps formed basically conform to the deflagrating characteristics of explosive material. Key

Key words: nitromethane, aluminumpowder, deflagratingcharacteristic, minimumignitionenergy, characteristicparameter

CLC Number:

O389

HE Ning， XIANG Cong， LI Wei， ZHANG Qi. Experimental Study on Deflagrating Characteristics of Nitromethane-aluminum Powder[J]. Acta Armamentarii, 2018, 39(1): 111-117.

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第39卷
第1期2018 年1月兵工学报ACTA
ARMAMENTARIIVol.39No.1Jan.2018

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Experimental Study on Deflagrating Characteristics of Nitromethane-aluminum Powder

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