Burn rate-pressure characteristic for PBX-1 explosive at high pressures

YAO Kuiguang; ZHAO Xuefeng; FAN Xing; XUE Pengyi; DAI Xiaogan

doi:10.11883/bzycj-2019-0347

Volume 40 Issue 1

Jan. 2020

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YAO Kuiguang, ZHAO Xuefeng, FAN Xing, XUE Pengyi, DAI Xiaogan. Burn rate-pressure characteristic for PBX-1 explosive at high pressures[J]. Explosion And Shock Waves, 2020, 40(1): 011404. doi: 10.11883/bzycj-2019-0347

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YAO Kuiguang, ZHAO Xuefeng, FAN Xing, XUE Pengyi, DAI Xiaogan. Burn rate-pressure characteristic for PBX-1 explosive at high pressures[J]. Explosion And Shock Waves, 2020, 40(1): 011404. doi: 10.11883/bzycj-2019-0347

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Burn rate-pressure characteristic for PBX-1 explosive at high pressures

doi: 10.11883/bzycj-2019-0347

Institute of Chemical Materials, CAEP, Mianyang 621999, Sichuan, China

Received Date: 2019-09-06
Rev Recd Date: 2019-11-19
Publish Date: 2020-01-01

Abstract

Abstract

The burn rate-pressure characteristic of explosive is the intrinsic factor of ammunition safety, which reflects the potential tendency of the development of reaction violence. We conducted the experiment to understand the deflagration behavior of PBX-1 explosive by using the method of burn pressure-burn consumption in a closed bomb. The temporal pressure data and burn front time-of-arrival data were respectively recorded by pressure transducer and microthermocouple, allowing direct calculation of burn rate as a function of pressure. The result shows that the burn rate equation of PBX-1 explosive can be expressed as r = (2.16±0.55) p^1.08±0.06 with the pressure exponent n＞1, indicating that the burn rate is sensitive to pressure. Over the pressure range 10−100 MPa the burn rate displays exponent dependence on the pressure. In contrast, PBX-1 exhibits erratic burn behaviors with pressures grater than 100 MPa and burn rate rises sharply. The analysis demonstrates that the physical deconsolidation of PBX-1 explosive at high pressure is the main factor, which physically disrupts the sample and results in burn specific surface area increasing over 100 times. PBX-1 explosive has potential tendency of enhancing the reaction violence by convective burning mechanism.
- explosive,
- burn rate,
- pressure,
- specific surface area

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References(16)

References

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