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Effects of electric field on micro-scale flame properties of biobutanol fuel

View Article: PubMed Central - PubMed

ABSTRACT

With the increasing need of smaller power sources for satellites, energy systems and engine equipment, microcombustion pose a potential as alternative power source to conventional batteries. As the substitute fuel source for gasoline, biobutanol shows more promising characteristics than ethanol. In this study, the diffusion microflame of liquid biobutanol under electric field have been examined through in-lab experiment and numerical simulation. It is found that traditional gas jet diffusion flame theory shows significant inconsistency with the experimental results of micro scale flame in electric field. The results suggest that with the increase of electric field intensity, the quenching flow rate decrease first and increase after it reach its minimum, while the flame height and highest flame temperature increase first and drop after its peak value. In addition, it was also observed that the flame height and highest temperature for smaller tube can reach its maximum faster. Therefore, the interaction between microscale effect and electric field plays a significant role on understanding the microcombustion of liquid fuel. Therefore, FLUENT simulation was adopted to understand and measure the impacts of microflame characteristic parameters. The final numerical results are consistent with the experimental data and show a high reliability.

No MeSH data available.


Experimental microflame structure with flow rate 1.8 ml/h for tube 2.(a) 0 V; (b) 4000 V.
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f5: Experimental microflame structure with flow rate 1.8 ml/h for tube 2.(a) 0 V; (b) 4000 V.

Mentions: For both tube 1 and tube 2, the experimental microflame structure and temperature field of numerical simulation are shown in Figs 3, 4, 5, 6, respectively. TA refers to the temperature of the reference point, where is 2 mm away from the micro ceramic tube orifice center. Simulated values with different DC voltage are compared with experimental results based on their deviation of flame characteristics to quantify the impact. The comparison results are listed in Table 2. With the numerical simulation results of the flame characteristics, we found:


Effects of electric field on micro-scale flame properties of biobutanol fuel
Experimental microflame structure with flow rate 1.8 ml/h for tube 2.(a) 0 V; (b) 4000 V.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5016967&req=5

f5: Experimental microflame structure with flow rate 1.8 ml/h for tube 2.(a) 0 V; (b) 4000 V.
Mentions: For both tube 1 and tube 2, the experimental microflame structure and temperature field of numerical simulation are shown in Figs 3, 4, 5, 6, respectively. TA refers to the temperature of the reference point, where is 2 mm away from the micro ceramic tube orifice center. Simulated values with different DC voltage are compared with experimental results based on their deviation of flame characteristics to quantify the impact. The comparison results are listed in Table 2. With the numerical simulation results of the flame characteristics, we found:

View Article: PubMed Central - PubMed

ABSTRACT

With the increasing need of smaller power sources for satellites, energy systems and engine equipment, microcombustion pose a potential as alternative power source to conventional batteries. As the substitute fuel source for gasoline, biobutanol shows more promising characteristics than ethanol. In this study, the diffusion microflame of liquid biobutanol under electric field have been examined through in-lab experiment and numerical simulation. It is found that traditional gas jet diffusion flame theory shows significant inconsistency with the experimental results of micro scale flame in electric field. The results suggest that with the increase of electric field intensity, the quenching flow rate decrease first and increase after it reach its minimum, while the flame height and highest flame temperature increase first and drop after its peak value. In addition, it was also observed that the flame height and highest temperature for smaller tube can reach its maximum faster. Therefore, the interaction between microscale effect and electric field plays a significant role on understanding the microcombustion of liquid fuel. Therefore, FLUENT simulation was adopted to understand and measure the impacts of microflame characteristic parameters. The final numerical results are consistent with the experimental data and show a high reliability.

No MeSH data available.