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Effects of Injection Pressure and Nozzle Geometry on Spray SMD and D.I. Emissions
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English
Abstract
A study was performed to correlate the Sauter Mean Diameter (SMD), NOx and particulate emissions of a direct injection diesel engine with various injection pressures and different nozzle geometry.
The spray experiments and engine emission tests were conducted in parallel using the same fuel injection system and same operating conditions. With high speed photography and digital image analysis, a light extinction technique was used to obtain the spray characteristics which included spray tip penetration length, spray angle, and overall average SMD for the entire spray. The NOx and particulate emissions were acquired by running the tests on a fully instrumented Caterpillar 3406 heavy duty engine.
Experimental results showed that for higher injection pressures, a smaller SMD was observed, i.e. a finer spray was obtained. For this case, a higher NOx and lower particulate resulted. For different nozzle geometry with the same injection duration and injection delivery, a rounded inlet nozzle gave a larger SMD than a sharp-edged inlet nozzle. The change in SMD between the two tips with injection pressure became smaller as the injection pressure increased. Also, a smaller hole size nozzle produced smaller droplet sizes and a smaller amount of particulate; but the trend of NOx depended on the injection pressure. A double injection strategy gave decreased SMD, reduced NOx, and lower particulate at the same time.
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Su, T., Chang, C., Reitz, R., Farrell, P. et al., "Effects of Injection Pressure and Nozzle Geometry on Spray SMD and D.I. Emissions," SAE Technical Paper 952360, 1995, https://doi.org/10.4271/952360.Also In
Emission Processes and Control Technologies in Diesel Engines
Number: SP-1119; Published: 1995-10-01
Number: SP-1119; Published: 1995-10-01
References
- Shimada, T. Shoji, T. Takeda, Y. “The Effect of Fuel Injection Pressure on Diesel Engine Performance,” SAE Paper No. 891919 1989
- Pierpont, D. A. Reitz, R. D. “Effects of Injection Pressure and Nozzle Geometry on D.I. Diesel Emissions and Performance,” SAE Paper No. 950604 1995
- Nishida, M. Nakahira, T. Komori, M. Tsujimura, K. Yamaguchi I. “Observation of High Pressure Fuel Spray with Laser Light Sheet Method,” SAE Paper No. 920459 1992
- Su, T. F. Farrell, P. V. Nagarajan, R. T. “Nozzle Effect on High Pressure Diesel Injection,” SAE Paper 950083 1995
- Dodge, L. G. Ryan, T. W. III Ryan, M. G. “Effects of Different Injector Hole Shapes on Diesel Sprays,” SAE Paper No. 920623 1992
- Nehmer, D. A. Reitz, R. D. “Measurement of the Effect of Injection Rate and Split Injections on Diesel Engine Soot and NOx Emissions,” SAE Paper No. 940668 1994
- Tow, T. C. Pierpont, D. A. Reitz, R. D. “Reducing Particulate and NOx Emissions by Using Multiple Injection in a Heavy Duty D.I. Diesel Engine” SAE Paper No. 940897 1994
- Timoney, D. J. Smith, W. J. “Correlation of Injection Rate Shapes with D.I. Diesel Exhaust Emissions,” SAE Paper No. 950214 1995
- Bower, G. R. Foster, D. E. “The Effect of Split Injection on Fuel Distribution in an Engine-Fed Combustion Chamber,” SAE Paper No. 930864 1993
- Shundoh, S. Komori, M. Tsujimura, K. Kobayashi, S. “NOx Reduction from Diesel Combustion Using Pilot Injection with High Pressure Fuel Injection,” SAE Paper No. 920461 1992
- Miyaki, M. Fujisawa, H. Masuda, A. Yamoamoto, Y. “Development of a New Electronically Controlled Fuel Injection System ECD-U2 for Diesel Engines,” SAE Paper No. 910252 1991
- El-Beshbeeshy, M. S. Hodges, J. T. Corradini, M. L. “Image Analysis of Diesel Sprays,” SAE Paper No. 921628 1992
- Gumprecht, R. O. Sliepcevich, C. M. “Scattering of Light by Large Spherical Particles,” J. Phys. Chem. 57 90 1953
- Kamimoto, T. Yokota, H. Kobayashi, H. “A New Technique for the Measurement of Sauter Mean Diameter in Droplets of Unsteady Dense Sprays,” SAE Paper No. 890316 1989
- El-Beshbeeshy, M. S. “Image Analysis of Sprays,” Department of Mechanical Engineering, University of Wisconsin-Madison 1992
- Reitz, R. D. Bracco, F. V. “Ultra-high-speed Filming of Atomizing Jets,” Physics of Fluids 22 6 1979
- Karasawa, T. Tanaka, M. Abe, K. Shiga, S. Kurabayashi, T. “Effect of Nozzle Configuration on the Atomization of a Steady Spray,” Atomization and Sprays 2 411 426 1992
- Greeves, G. Tullis, S. “Contribution of EUI-200 and Quiescent Combustion System Towards US94 Emissions,” SAE Paper No. 930274 1993