Fae Fuel Detonation Characteristics Of Gas Clouds

The detonation characteristics of several FAE fuel spray in air, such as PO(propylene oxide), hydrocarbon C5-C6 and pentylene has been studied in this paper. Main contents as follows:(1) Making use of the vertical shock tube, the detonation parameters of several fuel are measured, such as critical initiation energy, detonation velocity, detonation pressure. The results indicates that the critical initiation energy of hydrocarbon C5-C6 is higher than the others and the excessive fuel and increasing initiation energy have no over the contribution to enhance the detonation intensity.(2) Improving the sooted-foil technique, the detonation cellular structures of several fuel-air mixtures are studied respectively under the normal pressure and negative pressure. Evident imprints are gained and the relationship among detonation cell size and initial pressure, equivalence ratio, initiation energy is too obtained. The experimental results show that when the initiation energy gets higher enough, there are the secondary celluar structures in the main celluar structures. In additon, we found that the detonation cell size of hydrocarbon will diminish with increasing of its degree of unsaturation.The detonation cell size of the fuel indicates its detonation sensitivity. Smaller is the cell size, higher is the mixture's detonation sensitivity. Contrarily, the situation is opposite.(3) The detonation mechanism of FAE fuel investigated. The detonation limit mechanism is studied firstly, the dynamics process of detonation of the hydrocarbon is analyzed, and the detonation mechanism of fuel spray in air is concluded. Final, the propagation process of detonation wave in the gas-liquid phase have been studied according to above analysis.