Prediction of Test Cell Visible Emissions
Final rept. Jun-Nov 1976
AIR FORCE CIVIL ENGINEERING CENTER TYNDALL AFB FL
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A theoretical correlation between jet engine test cell plume opacity and Society of Automotive Engineers SAE engine smoke number SN was developed. Intermediate results provide soot loading at the exhaust plane of the engine, engine exhaust flow rates and test cell total air flow rate. The specific particle extinction coefficient which correlates light scattering properties with soot loading is the most difficult parameter to define. A value predicted from Mie theory is used for correlations close to the exhaust plane of the engine. At the exit plane of the exhaust stack agglomeration and scouring change the particle size distribution and individual particle density so that theoretical prediction is difficult. The value for specific particle extinction coefficient at the exhaust stack was chosen based on what little empirical data was available. When additional data becomes available, it should be possible to define this parameter more precisely.
- Jet and Gas Turbine Engines
- Air Pollution and Control