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A Study on the Oxygen Consumption Rate and Explosion Energy of Combustible Wood Dust in Confined System - Part I: Quantification of Explosion Energy and Explosive Efficiency

밀폐계 가연성 목재분진의 폭발에너지와 산소소모율에 관한 연구 - Part I: 폭발에너지의 정량화 및 폭발효율

  • Received : 2016.04.06
  • Accepted : 2016.08.08
  • Published : 2016.08.31

Abstract

A dust explosion is a phenomenon of strong blast wave propagation involving destruction which results from dust pyrolysis and rapid oxidation in a confined space. There has been some research done to find individual explosion characteristics and common physical laws for various dust types. However, there has been insufficient number of studies related to the heat of combustion of materials and the oxygen consumption energy about materials in respect of dust explosion characteristics. The present study focuses on the relationship between dust explosion characteristics of wood dust samples and oxygen consumption energy. Since it is difficult to estimate the weight of suspended dust participating in explosions in dust explosion and mixtures are in fuel-rich conditions concentrations with equivalent ratios exceeding 1, methods for estimating explosion overpressure by applying oxygen consumption energy based on unit volume air at standard atmospheric pressure and temperature are proposed. In this study an oxygen consumption energy model for dust explosion is developed, and by applying this model to TNT equivalent model, initial explosion efficiency was calculated by comparing the results of standardized dust explosion experiments.

Keywords

confined system;maximum explosion pressure;equivalent ratio;explosion energy;explosion efficiency

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Acknowledgement

Supported by : 기초전력연구원, 한국연구재단