The infrared characteristics of liquid rocket plume,in spectrum 2～5?μm,was calculated using integral method of radiation transfer equation.The absorption of air at sea level was considered.The temperature and mole fraction of components in the cylindrical plume vary in axial and radial directions.The absorption and emission of gaseous components: H_2O,CO_2,CO were considered in computation.The spectral transmission of gas were calculated by the SLG model and air by LOWTRAN7.0.The spectral radiation intensity... The infrared characteristics of liquid rocket plume,in spectrum 2～5?μm,was calculated using integral method of radiation transfer equation.The absorption of air at sea level was considered.The temperature and mole fraction of components in the cylindrical plume vary in axial and radial directions.The absorption and emission of gaseous components: H_2O,CO_2,CO were considered in computation.The spectral transmission of gas were calculated by the SLG model and air by LOWTRAN7.0.The spectral radiation intensity outgoing plume surface,and that after being absorbed by the air path of 0.88?km was calculated.By comparing,the results was basically accord with that in reference. |