• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Engines and Vehicles >Experimental and Numerical Investigation of the Maximum Pressure Rise Rate for an LTC Concept in a Single Cylinder CI Engine
【24h】

Experimental and Numerical Investigation of the Maximum Pressure Rise Rate for an LTC Concept in a Single Cylinder CI Engine

机译：单缸CI发动机LTC概念最大压力上升速率的实验性和数值研究

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In the foreseeable future, the transportation sector will continue to rely on internal combustion engines. Therefore, reduction of engine-out emissions and increase in engine efficiency are important goals to meet future legislative regulations and restricted fuel resources. One viable option, which provides lower peak temperatures and increased mixture homogeneity and thus simultaneously reduces nitric oxide as well as soot, is a low-temperature combustion (LTC) concept. However, this might result in an increase of unburnt hydrocarbon, carbon monoxide, and combustion noise due to early combustion phasing and lower engine efficiency. Various studies show that these drawbacks can be compensated by advanced injection strategies, e.g. by employing multiple injections. The aim of this work is to identify the optimum injection strategy, which enables a wide range of engine operating points in LTC mode with reduced engine-out emissions. To achieve this goal, experiments with variations in the maximum pressure rise rate, injection pressure, intake pressure, and the EGR-rate are carried out and analyzed. Numerical investigation is carried out by three dimensional (3D) computational fluid dynamics (CFD) simulations in CONVERGE software for several multiple injection strategy conditions. CFD could predict ignition delay, pressure rise and heat release rate of each injection and hence overall injection rate shaping combustion process with good accuracy.
机译：在可预见的未来，运输部门将继续依靠内燃机。因此，减少发动机排放和发动机效率的增加是满足未来立法法规和限制燃料资源的重要目标。一种可行的选择，可提供较低的峰值温度并增加混合均匀性，因此同时减少一氧化氮以及烟灰，是低温燃烧（LTC）概念。然而，这可能导致未燃烧的烃，一氧化碳和由于早期燃烧阶段和较低发动机效率导致的燃烧噪声增加。各种研究表明，这些缺点可以通过先进的注射策略来补偿，例如，如前所述。通过采用多次注射。这项工作的目的是识别最佳注射策略，可在LTC模式下实现广泛的发动机运行点，减少发动机排放减少。为了实现这一目标，进行了最大压力上升速率，注射压力，进气压力和EGR率的变化的实验和分析。数值调查由聚合软件中的三维（3D）计算流体动力学（CFD）模拟进行了几种多次注射策略条件。 CFD可以预测每次注射的点火延迟，压力升高和热释放速率，因此具有良好的精度燃烧过程的整体喷射率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号