...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Aerosol Science >Analysis of fractal particles from diesel exhaust using a scanning-mobility particle sizer and laser-induced incandescence
【24h】

Analysis of fractal particles from diesel exhaust using a scanning-mobility particle sizer and laser-induced incandescence

机译：使用扫描移动粒度仪和激光诱导的白炽灯分析柴油机废气中的分形颗粒

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The emission regulations for diesel particulate matter (PM) are becoming increasingly strict. The focus of regulations is turning to reducing the number of nanosized particles as well as the total mass. A more precise measurement technique for particle numbers and mass must be developed to meet these new regulations. In this study, a new method for estimating the mass weighted size distribution of diesel PM was investigated by measuring the size of primary particles and the number concentration distribution of particle aggregates. Time-resolved laser-induced incandescence was used for primary particle size measurement and a scanning-mobility particle sizer was used to quantify the number concentration of aggregates. The results from these two conventional measurement techniques were combined using fractal analysis formulas to relate the electrical mobility diameter, the number of primary particles per aggregate, primary particle size, and fractal dimension. This method, applied to single-cylinder diesel engine exhaust with various engine loads and injection pressures, successfully estimated the mass weighted size distribution of particle aggregates. The procedure is very simple and the estimations are comparable with those based on effective density, making this method a useful and reliable tool for estimating mass weighted size distribution of fractal particles such as diesel PM.
机译：柴油颗粒物（PM）的排放法规越来越严格。法规的重点转向减少纳米颗粒的数量以及总质量。为了满足这些新规定，必须开发一种更精确的颗粒数量和质量测量技术。在这项研究中，通过测量一次颗粒的尺寸和颗粒聚集体的数量浓度分布，研究了一种估算柴油机颗粒物质量加权尺寸分布的新方法。时间分辨的激光诱导的白炽度用于一次粒度测量，而扫描迁移率粒度仪用于量化聚集体的浓度。使用分形分析公式将这两种常规测量技术的结果进行组合，以关联电迁移率直径，每个聚集体中的初级粒子数量，初级粒径和分形维数。该方法应用于具有各种发动机负载和喷射压力的单缸柴油机排气，成功地估算了颗粒聚集体的质量加权尺寸分布。该过程非常简单，其估算值可与基于有效密度的估算值相媲美，从而使该方法成为估算分形颗粒（如柴油机PM）的质量加权尺寸分布的有用且可靠的工具。

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