Quantitative temperature imaging at elevated pressures and in a confined space with CH4/air laminar flames byfiltered Rayleigh scattering

• 来源期刊: 中国物理B（英文版）
• 关键词: filtered Rayleigh scattering high-pressure combustion simulator temperature measurement
• 年，卷（期）: 2020,（2）
• 页码范围: 354-360
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/ab5f00

摘要

Laminar methane/air premixed fl ames at different pressures in a newly developed high-pressure laminar burner are studied through Cantera simulation and filtered Rayleigh scattering (FRS). Different gas component fractions are obtained through the detailed numerical simulations. And this approach can be used to correct the FRS images of large variations in a Rayleigh cross section in different fl ame regimes. The temperature distribution above the fl at burner is then presented without stray light interference from soot and wall refl ection. Results also show that the extent of agreement with the single point measurement by the thermocouple is<6％. Finally, this study concludes that the relative uncertainty of the presented filtered Rayleigh scattering diagnostics is estimated to be below 10％in single-shot imaging.