| The microscale combustion characteristics of W type delay composition wereinvestigated in this thesis. The change rules of the combustion rate with the columndiameter and density were achieved through lots of experiments. The results show that thecombustion rate decreased with the increase in density when the column diameterremained the same. When the density kept unchanged, the combustion rate decreased withthe decrease in column diameter. Quenching would happen when the column diameter wasreduced to a certain value. The critical diameter varied with the density. When the densitywas 4.08g·cm-3, the critical diameter for stable combustion in thick wall was 1mm. Basedon the equation of energy conversation and the equation of mass conservation, anone-dimensional combustion model was advanced to investigate the effect of the scale onthe characteristics of micro-combustion. A heat loss parameter K, i.e. the ratio of thequantity of heat loss to the quantity of heat generation, was introduced to the model.Theoretical analysis of the model revealed the relation between the theoretical combustionrate and the heat loss parameter K. It was demonstrated that the value of heat lossparameter K increased with the decrease in the column diameter. The value of theparameter K indicated directly the combustion stability of micro combustion. Combustionbecame more unstable as the value of the parameter K increased. Based on theone-dimensional model, a two-dimensional model was established.
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