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| 混合燃料中生物柴油掺混比例对发动机性能影响的研究 |
| Influence of mixing ratio of biodiesel in blended fuel on engine performance |
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| DOI： |
| 中文关键词: 柴油机 生物柴油 试验台架 燃烧过程 |
| 英文关键词:diesel engine biodiesel test bench combustion |
| 基金项目: |
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| 中文摘要: |
| 为了研究高原环境下生物柴油-乙醇-柴油混合燃料中生物柴油对柴油发动机性能的影响，选用纯柴油、B15E3(生物柴油体积分数为15%，乙醇体积分数为3%和柴油体积分数为82%)和B25E3(生物柴油体积分数为25%，乙醇体积分数为3%和柴油体积分数为72%)在柴油发动机YN30CR上进行试燃，在最大扭矩转速工况下比较3种燃料的燃烧性、经济性和排放性差异。结果表明: 燃烧混合燃料的发动机动力性下降，B25E3下降明显，缸内压力峰值下降1 MPa，压力升高率峰值下降0.14 MPa/°CA；燃烧B15E3和B25E3的瞬时放热率峰值较纯柴油低4.8%、5.6%；当量燃油消耗量低于纯柴油，燃油经济性有一定改善；中低负荷下，纯柴油当量燃油消耗量最高，B25E3的当量燃油消耗量低于B15E3，高负荷下，燃烧B25E3的当量燃油消耗量稍高于B15E3；燃用B15E3和B25E3后，碳烟排放低于燃烧纯柴油，B25E3改善幅度大于B15E3，随着负荷的增加，碳烟排放性的改善较为明显。 |
| 英文摘要: |
| In order to study the influence of biodiesel in biodiesel - ethanol - diesel fuel mixture on diesel engine performance in the plateau environment, pure diesel, B15E3 (volume fractions of biodiesel, ethanol and diesel 15%, 3% and 82%) and B25E3 (volume fractions of biodiesel, ethanol and diesel 25%, 3% and 72%) were chosen to try combustion in diesel engines YN30CR. Under the working condition of the maximum torque speed, combustibility, economy and emission differences of the three kinds of fuels were compared. The results showed that the engine power performance declined when burning blended fuel, the decrease was obvious when burning B25E3 the peak value of cylinder pressure dropped by 1 MPa, and the peak value of pressure rising rate dropped by 0.14 MPa/°CA. When burning B15E3 and B25E3, the peak value of instantaneous heat release rates reduced by 4.8% and 5.6% respectively compared with pure diesel, their equivalent fuel consumptions were lower than pure diesel, and the fuel economy improved. Under the low and middle load, the equivalent fuel consumption of pure diesel was the highest, and the equivalent fuel consumption of B25E3 was lower than that of B15E3. Under high load, the equivalent fuel consumption of B25E3 was slightly higher than that of B15E3. After burning B15E3 and B25E3, smoke emission was lower than pure diesel combustion, and B25E3 improved higher than B15E3. With the load increasing, the improvement of smoke emission was more obvious. |
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