In-cylinder wall temperature measurements using Thermographic Phosphors and Laser-induced Fluorescence Spectroscopy

使用热成像荧光粉和激光诱导荧光光谱测量缸内壁温度

• 批准号: 129883407
• 负责人: Professor Dr. Andreas Dreizler
• 金额: --
• 依托单位: Fachgebiet Reaktive Strömungen und Messtechnik (RSM)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/129883407?language=en
• 关键词: cylinder; wall; temperature; measurements; using

The goal of this proposal is to obtain precise measurements of wall temperatures inside internal combustion engines with high temporal and spatial resolution. For this purpose, an optical non-contact surface temperature measurement technique called phosphor thermometry is employed. This method takes advantage of thermographic phosphors, whose spectral properties change with temperature. Based on the results of the first period of proposal, in-cylinder wall temperatures are to be determined with high sampling rates in order to monitor surface temperatures of individual cycles. These measurements are complemented by spatially and temporally resolved flame visualizations. Therefore planar laser-induced fluorescence of the OH-radical is employed, which is well suited for flame front visualizations. By the use of high-speed-lasers and-cameras wall temperatures and flame-wall-interactions are detected simultaneously with a temporal resolution of one degree of crank angle. Besides the validation of numerical simulations, the results will improve the understanding of component thermal stress, instationary heat-losses and flame-quenching in the vicinity of walls, which partly accounts for primary production of pollutants.

该提案的目的是获得具有高时空和空间分辨率的内燃机内壁温的精确测量。为此，采用了一种称为磷光体温度计的光学非接触表面温度测量技术。该方法利用了热磷剂，其光谱特性随温度而变化。根据提案的第一阶段的结果，应以高采样速率确定缸内壁温度，以监测单个周期的表面温度。这些测量由空间和时间分辨的火焰可视化互补。因此，采用了平面激光引起的OH-RADICAL的荧光，非常适合火焰前可视化。通过使用高速激光器和胶囊壁温度和火焰壁之间的使用，同时检测到一个时间曲柄角度的时间分辨率。除了对数值模拟的验证外，结果还将改善对墙壁附近的组件热应力，机构热量和火焰的理解，这部分解释了污染物的主要产生。