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Experimental study on burning behaviors and thermal radiative penetration of thin-layer burning

Journal of Thermal Analysis and Calorimetry, ISSN: 1588-2926, Vol: 130, Issue: 2, Page: 1153-1162
2017
  • 24
    Citations
  • 0
    Usage
  • 4
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    24
    • Citation Indexes
      24
  • Captures
    4

Article Description

The thin-layer burning platform was constructed to study the thin-layer burning behaviors. The thermal radiative penetration and the temperature distribution of heptane for different layer depths were tested. Pool size and initial fuel thickness were changed in the experiment. The experimental results indicate that the thickness of the isothermal layer gradually increases after ignition and then keeps stable because of the absorbed thermal radiation feedback. For the thin-layer burning, the burning rate is related to the heptane thickness. For thermal radiation feedback dominating the burning, the thin-layer burning rate decrease is mainly caused by the penetrated thermal radiation. Furthermore, the infrared absorption selectivity of heptane is demonstrated by thermal radiation penetration. It is found that the incident thermal radiation can be simply separated into two parts: one part can be absorbed, while the other cannot. Firstly, the thermal radiative penetration observes the Beer laws and the average heptane-absorbed coefficient is approximately 0.493 mm. On the other hand, the non-absorption part accounts for 26% of the whole incident thermal radiation feedback. Based on the experimental data, a semi-empirical model is developed to calculate the thermal radiative penetration at different thickness levels.

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