In-situ combustion measurements of CO{sub}2 using diode laser sensors near 2.0μm

摘要

High temporal resolution of CO{sub}2 and H{sub}2O measurement were made in a combusting field to realize an in-situ combustion diagnostics based on diode laser absorption sensors. HITRAN 98 and HITEMP database of high temperature CO{sub}2 and H{sub}2O were used to select their detection. 4878.193 cm{sup}(-1), 5008.101 cm{sup}(-1) and R(50) lines were selected to define H{sub}2O temperature and CO{sub}2 concentration. As a result, measured H{sub}2O temperature agreed with measurement with R-type thermocouple within standard deviation. CO{sub}2 concentration, however, showed large value than we expected.