Comparison between actual and simulated smoke for smoke detection certification in aircraft cargo compartments using the CFD method

During flight tests for certification of smoke detection systems in aircraft cargo compartments, simulated smoke is often used instead of real smoke. Previous research has noted various differences between simulated and real smoke but few studies have investigated the differences in the transport and detection of the two smoke types. This report compares real and simulated smoke using computational fluid dynamics with numerical models for the two types of smoke. The numerical models were developed in the Fire Dynamics Simulator of the National Institute of Standards and Technology and validated through experimental data. The detection properties and transport properties of simulated and real smoke were evaluated quantitatively. The smoke types were compared at the same quantity and at the same release rate. The experimental results showed that during the early stage of smoke generation the numerical values of light transmission in simulated smoke are between 10% to 20% lower than those in real smoke, making simulated smoke easier to detect. In airworthiness verification of aircraft cargo smoke detection, the equivalence between simulated smoke and real smoke should be taken into account.

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  • Accession Number: 01765596
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 22 2021 5:18PM