本文選題：微米鋁粉 + 最大爆炸壓力�。� 參考：《北京理工大學(xué)學(xué)報(bào)》2016年07期

【摘要】：采用20L球形爆炸裝置,對(duì)6種不同粒徑分布的微米鋁粉在不同濃度下的爆炸特性進(jìn)行了實(shí)驗(yàn)研究,考察了濃度和粒徑對(duì)鋁粉爆炸特性的影響規(guī)律,并分析了其爆炸產(chǎn)物的表面特征.結(jié)果表明,鋁粉的最大爆炸壓力、壓力上升速率和爆炸指數(shù)隨鋁粉濃度的增加呈拋物線變化,在最適爆炸濃度(copt=500g/m3)時(shí)三者均達(dá)到峰值.隨著鋁粉粒徑的減小時(shí),最大爆炸壓力、壓力上升速率呈指數(shù)增加趨勢(shì),且在鋁粉粒徑小于10μm時(shí),其增幅更為顯著.爆炸過程中的鋁粉粉塵云的燃燒時(shí)間隨鋁粉濃度的增大呈指數(shù)規(guī)律衰減并趨于平緩,同時(shí)隨著鋁粉粒徑的減小而降低.
[Abstract]:By using 20L spherical explosive device, the explosion characteristics of six kinds of micron aluminum powder with different particle size distribution at different concentrations were studied experimentally, and the effects of concentration and particle size on the explosion characteristics of aluminum powder were investigated. The surface characteristics of the explosive products were also analyzed. The results show that the maximum explosion pressure, pressure rise rate and explosion index of aluminum powder vary in parabola with the increase of aluminum powder concentration, and reach the peak at the optimum explosion concentration of 500 g / m ~ (3). With the decrease of the particle size of aluminum powder, the maximum explosion pressure and the pressure rising rate increase exponentially, and the increase is more obvious when the particle size of aluminum powder is less than 10 渭 m. The combustion time of aluminum dust cloud decreases exponentially with the increase of aluminum powder concentration and decreases with the decrease of aluminum particle size.
【作者單位】： 中國礦業(yè)大學(xué)安全工程學(xué)院煤礦瓦斯與火災(zāi)防治教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51204169,51574230) 江蘇省自然科學(xué)基金資助項(xiàng)目(BK20131115)
【分類號(hào)】：TG146.21;O38
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本文編號(hào)：1923330