首页   按字顺浏览 期刊浏览 卷期浏览 In-Situ Species, Temperature and Velocity Measurements in a Pulverized Coal Flame
In-Situ Species, Temperature and Velocity Measurements in a Pulverized Coal Flame

 

作者: WASEEMA. NAZEER,   LYLEM. PICKETT,   DaleR. TREE,  

 

期刊: Combustion Science and Technology  (Taylor Available online 1999)
卷期: Volume 143, issue 1-6  

页码: 63-77

 

ISSN:0010-2202

 

年代: 1999

 

DOI:10.1080/00102209908924193

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

A study of detailed species, velocity and temperature data of a pulverized coal flame is important to understanding the mechanisms which sustain the flame and lead to the formation of various pollutants such as NOx. The data can be particularly useful when compared to comprehensive combustion models which encapsulate the sub-models and processes of combustion. This data set contains in-situ axial and radial temperature, velocity and species concentrations for three swirl ratios of a pulverized coal flame located in a cylindrical, down-fired, 0.2 MWtreactor. Species measurements include CO, CO2, NO and O2. Velocity measurements were obtained using Laser Doppler Anemometry (LDA) and are summarized here after the method and results were reported in detail in a companion paper. The data show the change in structure of the coal flame as swirl is increased. At zero swirl the flame was located along a centerline jet, but as swirl increased, a recirculation zone was created which carried the combustion products up along the centerline of the reactor. Effluent NO was found to cone-late with the recirculation of products into the devolitilization zone and with the evidence of reduced mixing of fuel and secondary air at the primary tube outlet. Species measurements agreed with LDA results where concentration of O2were highest in the region of the secondary air jet. The species and temperature measurements are self consistent suggesting the data is accurate and will be useful when compared to combustion models.

 

点击下载:  PDF (664KB)



返 回