柴油发动机燃料质量分布对乙醇燃烧的影响

2012 International Conference on Renewable Energy Research and Applications (ICRERA) Pub Date : 2012-11-01 DOI:10.1109/ICRERA.2012.6477397

S. Yamamoto, D. Sakaguchi, H. Ueki, M. Ishida

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引用次数: 3

摘要

用激光双焦点测速仪(L2F)测量了常压条件下柴油喷雾稠密区液滴的速度和大小。将测量得到的喷雾中燃油质量分布与3D-CFD软件KIVA-3V的模拟结果进行了比较。改变KIVA-3V程序中喷油器喷嘴附近喷雾液滴的径向速度，以再现测量的燃料质量分布。采用原KIVA-3V和修改后的KIVA-3V代码分别对四烷烃(C14H30)和乙醇质量为80%和20%的Et20进行了燃烧模拟。结果表明，在质量分布发生变化的情况下，热释放率和点火延迟时间的模拟结果基本保持不变。然而，在十四烷和Et20燃烧模拟中，使用原始KIVA-3V代码模拟的预测烟灰生成量与使用修改后的KIVA-3V代码模拟的预测烟灰生成量存在差异。

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Effect of fuel mass distribution on ethanol combustion in diesel engine

A laser 2-focus velocimeter (L2F) has been applied for measurements of velocity and size of droplets in the dense region of diesel fuel spray under the atmospheric pressure condition. The fuel mass distribution in the spray obtained by the measurement was compared with the one simulated by using 3D-CFD code KIVA-3V. The radial velocity of spray droplets near the injector nozzle in the KIVA-3V code was changed to reproduce the measured fuel mass distribution. The combustion simulations of tetradecane (C14H30) and Et20, which consists of 80% tetradecane and 20% ethanol by mass, were conducted by using both original and modified KIVA-3V codes. It was found that the simulation results of heat release rate and ignition delay period remained almost unchanged even though the mass distribution was changed. However, the predicted amount of soot formation simulated by using original KIVA-3V code was different from that simulated by using modified KIVA-3V code in both of tetradecane and Et20 combustion simulations.

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2012 International Conference on Renewable Energy Research and Applications (ICRERA)

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