Numerical simulation of the dynamics of a non-stationary liquid jet

A simple mathematical model of the dynamics of a non-stationary liquid jet (NSLJ) is presented to describe the injection of diesel fuel in a diesel engine, supplied under pressure to the combustion chamber. The proposed model describes the dynamics of the NSLJ as a motion of the center of mass of a...

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Bibliographic Details
Published in:Thermophysics and aeromechanics 2020-11, Vol.27 (6), p.811-824
Main Authors: Senachin, P. K., Kiryushin, I. I., Samarin, A. V., Senachin, A. P., Ulrich, S. A.
Format: Article
Language:English
Subjects:
Combustion chambers
Diesel engines
Diesel fuels
Dynamics
Liquid fuels
Mathematical models
Physics
Physics and Astronomy
Thermodynamics
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Summary:A simple mathematical model of the dynamics of a non-stationary liquid jet (NSLJ) is presented to describe the injection of diesel fuel in a diesel engine, supplied under pressure to the combustion chamber. The proposed model describes the dynamics of the NSLJ as a motion of the center of mass of a material point of variable mass based on the laws of Newton’s mechanics. In this case, the mass of the material point is made up of the mass of liquid fuel and air involved in the motion, taking into account the uneven distribution of fuel and air along the length of the NSLJ. Numerical modeling using new experimental data shows a satisfactory agreement between the theoretical and experimental results on the dynamics of the NSLJ development. The model allows optimizing the dynamics of NSLJ and mixing processes for specific sizes of the diesel combustion chamber on the basis of numerical modeling.
ISSN:0869-8643
1531-8699
DOI:10.1134/S0869864320060025