Jet-Jet and Jet-Wall Interactions of Transient Jets from Multi-Hole Injectors 1999-01-0513
Interactions between the jets in a multi-hole injector and between the jet and the wall may affect the fuel-air mixing processes in a direct-injection Diesel engine. These interactions are the subject of the investigation in this work. It is known that in the case of free jets, for a given total mass and momentum flow rate, increasing the number of holes would result in an increase in the mixing rate. In the case of a multi-hole injector in an engine, however, if the number of holes are increased beyond an optimum value, the interaction between the jets themselves may result in a reduced mixing. In the limit of increasing the number of holes, a hollow-cone jet would result. The fuel-air mixing in the hollow-cone jet is shown to be slower than in a multi-hole injector with an optimum number of holes. It is also shown that the walls do not appear to have a significant direct effect on the mixing rate as the characteristic time associated with mixing appears to be much shorter than that associated with momentum loss to the walls.
Citation: Abraham, J., Khan, A., and Magi, V., "Jet-Jet and Jet-Wall Interactions of Transient Jets from Multi-Hole Injectors," SAE Technical Paper 1999-01-0513, 1999, https://doi.org/10.4271/1999-01-0513. Download Citation
Author(s):
J. Abraham, A. Khan, V. Magi
Affiliated:
School of Mechanical Engineering, Purdue University, Department of Environmental Engineering and Physics, University of Basilicata, Italy
Pages: 14
Event:
International Congress & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Processes of Diesel Engine Combustion-SP-1444
Related Topics:
Diesel / compression ignition engines
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