• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>EAEC European automotive congress >INVESTIGATION OF THE SPRAY BEHAVIOUR OF ULTRAHIGH PRESSURE INJECTED ALTERNATIVE DIESEL FUELS
【24h】

INVESTIGATION OF THE SPRAY BEHAVIOUR OF ULTRAHIGH PRESSURE INJECTED ALTERNATIVE DIESEL FUELS

机译：超高压注入替代柴油燃料喷雾行为的研究

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

摘要

The need to reduce NO_x- and particulate emissions becomes more important for the development of modern diesel engines because of future exhaust emission standards. Furthermore current European legislations for CO_2 emission and the increasing shortage of fossil energy sources make it important to reduce the fuel consumption. Engine modifications, like the increasing of injection pressure can improve mixture formation and lead to an increasing homogenization of air/fuel mixture. The consequence can be a better combustion of air/fuel mixture and an increasing reduction of CO_2 emissions of diesel engines. A more homogeneous air/fuel mixture in combination with an exhaust gas recirculation reduces the particulate matter emissions and simultaneously the nitrogen oxide emissions. Furthermore the use of alternative fuels, extracted from biomass, has a high potential to reduce CO_2 emissions from their production up to combustion in the engine. So the employment of alternative fuels with simultaneous optimizing the mixture formation presents an important mean to reduce the emissions and the fuel consumption of modern diesel engines. In the project “Ultra High Pressure Injection of Alternative Diesel Fuels”, an injection system was build up which is able to inject alternative fuels with an injection pressure up to pInjection = 3,000 bar. Simultaneously a pressure chamber was used for diesel operation in which a chamber pressure and temperature level can be realized up to pChamber = 60 bar respectively TChamber = 200 °C. The paper presents results of the spray behaviour, which were measured in a pressure chamber with optical measuring devices (high-speed camera and Phase-Doppler- Anemometry, PDA) and conditions like an engine. To characterize the spray more detailed, optical laser measurement devices will be used to investigate the geometrical size of discrete droplets. A simultaneously carried out Computation Fluid Dynamics (CFD) simulation completes these investigations. The mean droplet size, which is derived from the laser optical investigations, gives information about the quality of the mixture formation and the involved combustion and emission formation. The paper presents the main results of the investigations and concludes with an outlook to ongoing research activities.
机译：由于未来的废气排放标准，减少NO_X和微粒排放的需要对现代柴油发动机的发展变得更加重要。此外，目前欧洲CO_2排放的立法和化石能源的不断缺乏缺乏使得减少燃料消耗很重要。发动机修饰，如进射压力的增加可以改善混合物形成并导致空气/燃料混合物的均匀化。结果可以是空气/燃料混合物的更好的燃烧，以及柴油发动机的CO_2排放的越来越大。一种更均匀的空气/燃料混合物与废气再循环组合降低了颗粒物质排放并同时氮氧化物排放。此外，从生物质中提取的替代燃料的使用具有很高的潜力，可以将来自其生产的CO_2排放减少到发动机中的燃烧。因此，通过同时优化混合形成的替代燃料的就业呈现了减少现代柴油发动机的排放和燃料消耗的重要意义。在项目“超高压注入替代柴油燃料”中，建立注射系统，能够注入替代燃料，注射压力直到探测器= 3,000巴。同时使用压力室用于柴油操作，其中腔室压力和温度水平可分别实现PChamber = 60巴，分别是Tchamber = 200℃。本文提出了喷射行为的结果，其在具有光学测量装置（高速摄像机和相位多普勒 - 水平测量，PDA）和像发动机的条件的压力室中测量。为了表征喷涂更详细，将使用光学激光测量装置来研究离散液滴的几何尺寸。同时进行的计算流体动力学（CFD）模拟完成了这些研究。源自激光光学研究的平均液滴尺寸提供了关于混合物形成的质量和所涉及的燃烧和发射形成的信息。本文提出了调查的主要结果，并在持续研究活动中结束。

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