An experimental investigation of the breakup characteristics of secondary atomization of emulsified fuel droplet
An experimental investigation of the breakup characteristics of secondary atomization of emulsified fuel droplet
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DOI：
10.1016/j.energy.2009.08.021
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发表时间：
2010-02
期刊：
影响因子：
9
通讯作者：
Hirotatsu Watanabe;Yoshiyuki Suzuki;Takuji Harada;Y. Matsushita;H. Aoki;T. Miura
中科院分区：
文献类型：
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作者：
Hirotatsu Watanabe;Yoshiyuki Suzuki;Takuji Harada;Y. Matsushita;H. Aoki;T. Miura
采用单滴实验研究了乳化油滴二次雾化的破碎特性。在单液滴实验中，将悬浮在细金属丝上的乳化燃料液滴插入电炉中，然后使用高速摄像机观察二次雾化行为。在一定假设条件下，利用质量守恒和能量守恒方程，建立了微爆炸水蒸气生成量的数学模型。在所提出的模型中，可以通过使用微爆炸时的内部液滴温度历史来计算。结果，即使使用细陶瓷纤维，也会发生膨化和微爆炸。该模型表明，乳化油中约50-70wt%的水在微爆发生时瞬间转化为水蒸气。给出了微爆所需的水量。破裂时间与微爆发生前的温度密切相关。
In this study, the breakup characteristics of secondary atomization of an emulsified fuel droplet were investigated with a single droplet experiment. In the single droplet experiment, the emulsified fuel droplet suspended from a fine wire was inserted into an electric furnace, and then secondary atomization behavior was observed using a high-speed video camera. Moreover, a mathematical model to calculate the generated water vapor at micro-explosion was proposed by using the mass and energy conservation equations under some assumptions. In the proposed model, that can be calculated by using the inner droplet temperature history at micro-explosion. As a result, puffing and micro-explosion occurred even when the fine ceramics fiber was used. The proposed model showed that about 50–70wt% of water in the emulsified fuel changed to water vapor instantaneously at the occurrence of micro-explosion. The mass of water necessary for micro-explosion was shown. The breakup time was closely related to the superheat temperature just before the occurrence of micro-explosion.