壓力振蕩環(huán)境下偏二甲肼液滴的燃燒特性
[Abstract]:The experimental system of droplet combustion in pressure oscillation environment was designed, and the experimental study of droplet combustion process under pressure oscillation environment was carried out, and the morphological characteristics of droplet combustion flame structure under pressure oscillation environment were analyzed. The model of droplet combustion under pressure oscillation environment is established. Based on the model, the effects of oscillation frequency, oscillation amplitude, the average pressure of combustion chamber and temperature on combustion characteristics are investigated. The results show that the combustion flame stability is significantly affected by the pressure oscillation environment, resulting in a variety of deformation and migration of flame morphology. Under the pressure oscillation environment, the repeated process of "shift-recovery" occurs continuously in the flame position of the droplet combustion, and this repeated state runs through the whole process of the droplet combustion. Increasing the oscillation frequency and amplitude intensifies the oscillation of the droplet combustion rate, but does not change its average value, so there is no obvious difference in the variation trend of droplet diameter under different frequencies and amplitudes. Increasing the average pressure of the combustor can obviously promote the combustion process and increase the combustion rate greatly. Increasing the temperature of combustion chamber can significantly promote the droplet combustion, make the droplet combustion rate and surface combustion flow rate increase rapidly, and do not aggravate the coupling of pressure oscillation and combustion rate.
【作者單位】: 裝備學(xué)院研究生院;裝備學(xué)院航天裝備系;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(91441123)
【分類號(hào)】:TK16
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