| 何旭，刘卫国，高希彦，廖春明，杨德胜.Computational and experimental study on TR combustion system of diesel[J].,2008,(2):185-192 |
| Computational and experimental study on TR combustion system of diesel |
| 柴油机TR燃烧系统模拟与试验研究 |
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| DOI：10.7511/dllgxb200802006 |
| 中文关键词: diesel combustion chamber numerical simulation spray |
| 英文关键词: 柴油机 燃烧室 数值模拟 喷雾 |
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| 中文摘要: |
| A new combustion system applied in the 135-type diesel engine \_ TR(Three-Rapidity), was modified from deep cave ω combustion chamber with an oriented arc in the middle of chamber wall, and perfectly fit to a nozzle with orifices in conic section plus orifice in the center. Three-dimensional numerical simulation was completed and compared between TR combustion system and original 135 diesel engine combustion system in 50% load by STAR-CD. The results show that in TR combustion system, fuel ignition location is near TDC, and premix combustion proportion increases. The oriented arc, contracted cave and centric spray contribute to enhancing air flow, making more reasonable fuel distribution and forming more homogeneous mixture. The usage of air in chamber is effectively increased and heat loss from the chamber wall is obviously decreased. The cold start performance of the engine is also improved. A performance test on TR combustion system was made on a 135-type diesel engine. The results demonstrate that TR has better exhaust smoke than the original engine. At the low and moderate load, NO x emission of TR combustion system is less than the original system, but more in high load condition, which can be solved by delaying fuel spray timing. TR combustion has much potential to improve emission with less structural change of the original engine. |
| 英文摘要: |
| 一种应用在135柴油机上的新型燃烧系统TR(Three-Rapidity) 是由收口深坑ω形燃烧室改进而成 在壁面设置导向圆弧 并与带中孔的多孔喷嘴相匹配 应用STAR-CD软件对TR燃烧系统在50 负荷下的工作过程进行三维数值模拟 并与原机燃烧系统相比较 结果表明 TR燃烧系统的着火点控制在上止点附近 增加了预混合燃烧的比重 采用导向圆弧、缩口燃烧室和中孔喷射 气流运动更加剧烈 燃油空间分布合理 空气利用充分 减少壁面散热损失 并具有良好的冷启动性能 在135单缸柴油机上进行试验研究 和原机相比TR燃烧系统具有良好的烟度排放特性 NO x 排放在中小负荷低于原机排放 在高负荷则有所增加 可通过推迟喷油来解决 TR燃烧系统在降低柴油机排放方面具有较大的潜力 对原机结构改动较少 具有广阔的应用前景 |
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