Computational studies of the fuel supply process of a diesel engine when it is powered by diesel fuel and biofuels
Abstract
One of the modern directions of achieving the required indicators of toxicity of exhaust gases of diesel engines is the use of mixed and emulsified biofuels. The article discusses the possibility of using rapeseed oil as fuel, as well as an emulsion of 70% rapeseed oil by volume with 30% ethanol. Computational studies of the flow of these fuels in the atomizer using the Ansys Fluent software package have been carried out. The stationary flow of the specified fuels into the sprayer of a diesel nozzle of the FDM-22 type manufactured by the Noginsk Fuel Equipment Plant with a sprayer of the Altai Precision Products Plant was simulated. The sprayer had five spraying holes with a diameter of 0.35 mm. At the same time, the pressure at the entrance to the design area was 51.5 MPa, and the back pressures were 0.1 and 8.9 MPa. It is noted that the emulsification of rapeseed oil with ethanol changes the properties of the fuel and the cavitation mode in the nozzle sprayer, which significantly affects the flow parameters in the sprayer. With both considered injection back pressures, the highest fuel flow velocity at the outlet of the spray hole is petroleum diesel fuel, the average is emulsion, and the lowest is rapeseed oil. With a back pressure of 0.1 MPa, the highest kinetic energy of turbulence at the outlet of the spray hole is noted for rapeseed oil, the average is for the emulsion, and the lowest is for diesel fuel. At a back pressure of 8.9 MPa, the kinetic energy of turbulence in the three fuels under consideration turned out to be commensurate, but its greatest value was noted for rapeseed oil.
About the Authors
Bowen Sa
Cera Turbo (Beijing) Sci & Tech Co., Ltd
China
China
Ph.D.
Vladimir A. Markov
BMSTU
Russian Federation
Russian Federation
Dr. Sc., professor
Sergey N. Devyanin
FSBEI HE RT SAU
Russian Federation
Russian Federation
Dr. Sc., professor
Andrey A. Savastenko
MADI
Russian Federation
Russian Federation
Ph.D., associate profe
Akbarjon A. Normurodov
BMSTU
Russian Federation
Russian Federation
postgraduate
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Review
Рецензент: М.Г. Шатров, д-р техн. наук, проф., МАДИ
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