Introduction: This Daemon will find infra-red emission and band intensities for combustion species such as CO2, CO, H2O etc. using the wide-band correlations (Siegel and Howell).

Instructions/Tips/Examples:

Q. What are the wavelengths at which there are prominent bands found in the infra-red region for the Species CO?

A. Select the mode wavelength. Choose the species CO from the choice menu. The list of prominant bands in the infra-red region are shown. To obtain the list in terms of wave numbers, click on the 'wave number' checkbox.

Q. Find the emission from a 100 cm long column of CO2, at a temperature of 2000 deg Farhenheit, and 100 kPa pressure for the 4.3 micron band.

A. Check the WaveLength checkbox. Choose CO2 as the species. Select (click on) 4.3 micron from the list. Input the temperature, pathlength, total and partial pressure in the given units. In this case the partial and total pressure are both 100 kPa. Click the 'calculate' button. The band intensity is 4511 W/m2.sr.

Q. Find the bandwidth and the black-body spectral intensity at the band center for the previous problem.

A. The bandwidth is 0.2622 mic. Hence i_b,lambda=i_l/A_l=4511/0.2622 W/m2.sr.mic.

Q. Find the band emittance for the same problem.

A. e_l=i_l/i_b=4511/62924 at this temperature and pressure.