Disturbances in N2-CARS Gas Temperature Measurements in Pulverised Coal-Air-CH4 Flames

D. BRADLEY; M. LAWES; M. J. SCOTT

Makale detayları

Disturbances in N2-CARS Gas Temperature Measurements in Pulverised Coal-Air-CH4 Flames

Yazarlar:

D. BRADLEY | M. LAWES | M. J. SCOTT

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Engineering and Environmental Sciences 2003 Vol.27 Issue 1, pp.31-44

Belge Tipi:

Makale

Yayın Tarihi:

12/2002

Belge Dili:

Türkçe

Document ID (Org No.):

2000745149

Sıklık:

Üç Yıllık

eISSN:

1303-6157

pISSN:

1300-0160

Özet:

 

The application of nitrogen vibrational and rotational CARS  thermometry to flat, premixed, laminar, methane-air and  coal-methane-air flames has been investigated using a Nd:YAG and dye  laser system at a low pressure of 30.4 kPa.  Although the CARS  technique previously has been easily applied to lean and stoichometric  methane-air flames, it was found that, in rich methane-air and  coal-methane-air flames, C2 radicals produced by the laser and  flame strongly absorbed part of the fundamental band of the CARS  spectrum.  This imposed severe interference on the N2-CARS signal.   A quantitative investigation of the errors in temperature measurements  caused by the C2 absorption is presented.  It is suggested that the  effect of C2 on the CARS signal must be taken into consideration  before reliable temperature information can be obtained from rich  gas-air flames and coal-air flames.  In this study, a modified experimental and data analysis technique has been   applied successfully to eliminate the influences of C2 on the CARS   temperature measurements.

 

The application of nitrogen vibrational and rotational CARS  thermometry to flat, premixed, laminar, methane-air and  coal-methane-air flames has been investigated using a Nd:YAG and dye  laser system at a low pressure of 30.4 kPa.  Although the CARS  technique previously has been easily applied to lean and stoichometric  methane-air flames, it was found that, in rich methane-air and  coal-methane-air flames, C2 radicals produced by the laser and  flame strongly absorbed part of the fundamental band of the CARS  spectrum.  This imposed severe interference on the N2-CARS signal.   A quantitative investigation of the errors in temperature measurements  caused by the C2 absorption is presented.  It is suggested that the  effect of C2 on the CARS signal must be taken into consideration  before reliable temperature information can be obtained from rich  gas-air flames and coal-air flames.  In this study, a modified experimental and data analysis technique has been   applied successfully to eliminate the influences of C2 on the CARS   temperature measurements.

Makale detayları

Disturbances in N2-CARS Gas Temperature Measurements in Pulverised Coal-Air-CH4 Flames

Yazarlar: D. BRADLEY | M. LAWES | M. J. SCOTT

Yayıncı: TUBITAK

Dergi: Turkish Journal of Engineering and Environmental Sciences 2003 Vol.27 Issue 1, pp.31-44

Belge Tipi: Makale

Yayın Tarihi: 12/2002

Belge Dili: Türkçe

Document ID (Org No.): 2000745149

Sıklık: Üç Yıllık

eISSN: 1303-6157

pISSN: 1300-0160

Sayı

Yazarlar:

D. BRADLEY | M. LAWES | M. J. SCOTT

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Engineering and Environmental Sciences 2003 Vol.27 Issue 1, pp.31-44

Belge Tipi:

Makale

Yayın Tarihi:

12/2002

Belge Dili:

Türkçe

Document ID (Org No.):

2000745149

Sıklık:

Üç Yıllık

eISSN:

1303-6157

pISSN:

1300-0160