Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8072218 | Energy | 2018 | 12 Pages |
Abstract
Puffing characteristics of BUT50 (50% n-butanol and 50% n-hexadecane by mass) were investigated using the droplet suspension technology under 638, 688 and 738â¯K. Experimental results showed that BUT50 underwent transient heating, fluctuation evaporation and equilibrium evaporation phases under all ambient temperatures. In the fluctuation evaporation phase, the fluctuation frequency of 738â¯K was higher than that of 638â¯K. (Dmax/D0)2 of 738â¯K was lower than that of 638â¯K. Easy bubble rupture led to high fluctuation frequency and low (Dmax/D0)2â¯at 738â¯K. Three turning points were found in transient temperature growth rate at 638 and 738â¯K. Four characteristic droplet temperatures were analyzed, including droplet temperatures at the start (T1) and end (T2) of transient heating phase, at (Dmax/D0)2 (T3) and at the end of total lifetime (T4). T2 was slightly lower and T3 was slightly higher than the boiling point of n-butanol. T4 was lower than the boiling point of n-hexadecane. Furthermore, the transient heating duration (tTH), fluctuation evaporation duration (tFE) and total lifetime (tTL) decreased with increasing ambient temperature. The reduction of tFE played an important role in the decrease of tTL. The percentages of tTH/tTL and tFE/tTL were stable with increasing ambient temperature.
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Energy (General)
Authors
Yu Zhang, Ronghua Huang, Yuhan Huang, Sheng Huang, Yinjie Ma, Shijie Xu, Pei Zhou,