Infrared Characterisation and Prediction of Aviation Turbine Fuel Plume
Abstract
Broad (3.7 μm - 4.8 μm) as well as narrow band (4.16 μm - 4.24 μm) mid wave infrared characterisation of plume has been reported here. Multiple angular measurements (azimuth) were carried out on a laboratory developed plume source with aviation turbine fuel (ATF) using thermal imaging systems. Correlation of IR prediction to experimental results is the key objectives of this study. As this narrow band covers the blue spike of plume, a comparison of the same with broad band plume contribution has been reported for the first time. Also, a model to simulate the IR radiation of two-dimensional parabolic jet was developed and used to predict spectral contribution from major hydrocarbon fuel combustion products (CO2 and H2O). In addition, it was found that the plume transmission characteristics extracted form imager measurements are qualitatively in agreement with prediction results.
- Fig 2: Thermocouple setup for plume temperature measurements
- Fig 3: Thermal profile along plume axis in broad- & narrow- bands
- Fig 4: Plume radiance profile along plume axis in Narrow & broad bands
- Fig 5: Thermal map of ATF plume in different aspect angles
- Fig 6: Comparison of the theoretically and experimentally obtained radiance profile
- Fig 7: Spectral radiance behaviour along jet axis centre line
- Fig 8: Axial transmission profile along the plume axis centre line
- Fig 9: Axial radiance distribution along the axis centre line
- Fig 10: Angular distribution of predicted Radiance vs. Experimental results (a) Narrow band (b) Broad band
- Table 1. Through Plume transmission for IR mapped Tc spot
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