High Power Laser and Particle Beams, Volume. 36, Issue 1, 011003(2024)

Analysis of thermal safety impact of airflow on the process of femtosecond laser processing explosive charge

Junying Wu, Fude Zheng, Yule Yao, Jiaxi Liu, and Lang Chen
Author Affiliations
  • State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
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    Figures & Tables(12)
    Schematic diagram of the physical model of the ablation of explosive charge by femtosecond laser under the action of tangential airflow
    Schematic diagram of calculation model of the ablation of explosive charge by femtosecond laser under the action of tangential airflow
    Velocity distribution of flow field in air under the action of unilateral airflow at different incidence angles
    Temperature-time curves at the monitoring points on the surface of the explosive under the action of 45° unilateral airflow
    Velocity distribution of flow field in the air domain under the action of bilateral airflow at different incidence angles
    Distribution of flow field without the action of external airflow
    Distribution of ablative gas products in the air domain under the action of 45° bilateral airflow
    Temperature distribution of flow field in air under the action of 45° bilateral airflow
    Temperature distribution in the non-ablated area of HMX under the action of 45° bilateral airflow
    Temperature-time curves of monitoring points under the action of bilateral airflow at different incidence angles
    • Table 1. Kinetic parameters of multi-step thermal decomposition reaction of HMX

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      Table 1. Kinetic parameters of multi-step thermal decomposition reaction of HMX

      explosivereaction stepE/(kJ·mol−1)Z/s−1Q/(kJ·kg−1)
      HMX12047.99×1020−42
      22211.41×1021−252
      31862.61×1016559
      41431.60×10125620
    • Table 2. Physical properties of HMX

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      Table 2. Physical properties of HMX

      density/(kg·m−3)specific thermal capacity/(J·kg−1·K−1)thermal conductivity/(W·m−1·K−1)absorption coefficient/m−1reflectioncoefficientthermal diffusion coefficient/(m2·s−1)
      1 90510500.3451.434×1060.0901.72×10−7
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    Junying Wu, Fude Zheng, Yule Yao, Jiaxi Liu, Lang Chen. Analysis of thermal safety impact of airflow on the process of femtosecond laser processing explosive charge[J]. High Power Laser and Particle Beams, 2024, 36(1): 011003

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    Paper Information

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    Received: Aug. 7, 2023

    Accepted: Dec. 8, 2023

    Published Online: Mar. 21, 2024

    The Author Email:

    DOI:10.11884/HPLPB202436.230256

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