Investigation on combustion reaction evolution model of charge with mass inertia constraint via non-shock ignition

PAN Chuanyu; HUANG Xilong; LI Ping; LI Tao; FU Hua; SHANG Hailin

doi:10.11883/bzycj-2024-0404

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PAN Chuanyu, HUANG Xilong, LI Ping, LI Tao, FU Hua, SHANG Hailin. Investigation on combustion reaction evolution model of charge with mass inertia constraint via non-shock ignition[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0404

Citation:

PAN Chuanyu, HUANG Xilong, LI Ping, LI Tao, FU Hua, SHANG Hailin. Investigation on combustion reaction evolution model of charge with mass inertia constraint via non-shock ignition[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0404

Citation:

PAN Chuanyu, HUANG Xilong, LI Ping, LI Tao, FU Hua, SHANG Hailin. Investigation on combustion reaction evolution model of charge with mass inertia constraint via non-shock ignition[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0404

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Investigation on combustion reaction evolution model of charge with mass inertia constraint via non-shock ignition

doi: 10.11883/bzycj-2024-0404

National Key Laboratory of Shock Wave Physics and Explosive Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, Sichuan, China

Received Date: 2024-10-24
Rev Recd Date: 2024-12-04

Available Online: 2024-12-04

Abstract

Abstract

To develop an engineering model based on the physical mechanism of the non-shock initiation reaction of structural charge, which can be used to describe the reaction evolution process and quantify the reaction intensity for evaluating weapons and ammunition safety. Considering the cavity expansion volume, a constrained charge combustion reaction evolution model was established in this paper, with fracture toughness and reaction pressure as the main parameters based on the main control mechanism of charge reaction crack propagation, which can describe the combustion gaseous product pressurization and shell constraint strength during combustion evolution. Relevant details for the control model establishment process were given. The model reliability of confined charge reaction combustion evolution was verified via the experiments of PBX-3 (87% HMX) explosive combustion reaction evolution under mass inertial confinement. The mass velocity time was recorded by PDV (photonic Doppler velocimetry) transducers, the pressure-time profiles were recorded via pressure transducers, and the experimental process was captured via a high-speed camera. The experimental results were compared with calculated results from the control model proposed in this work. The results show that the reaction pressurization process calculated via the model is roughly consistent with the pressure-increasing trend in the experiment (calculated by the mass velocity). The control model considering the structural venting effect can reflect the competition mechanism between combustion gas pressurization and venting in the pressure-increasing process, and the relationship between the pressure-increasing trend and the vent coefficient is in line with the mechanism analysis expectation. The results can support deepening the understanding of the accidental explosive combustion reaction evolution mechanism.
- non-shock ignition,
- combustion evolution,
- mass inertia constraint,
- model verification,
- burning crack.

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References(24)

References

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