Numerical Investigation of in-cylinder Tumble/swirl flow on mixing, turbulence, and combustion of Methane in SI engine Indian Institute of Technology Ropar

Format:

Book

Conference/Event

Author/Creator:

YADAV, Neeraj Kumar, author.

Contributor:

Maurya, Rakesh Kumar

Saxena, Mohit Raj

Conference Name:

SAE Powertrains, Fuels & Lubricants Meeting (2020-09-22 : Krakow, Poland)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2020

Summary:

In the present study, the in-cylinder flow motion tumble/ swirl are investigated in canted valve engine and their effect on the homogeneity, turbulence, and combustion of gasoline-like fuels (Methane and Methanol) using ANSYS. The study is focused on the effect of initial swirl and tumble on the charge preparation, turbulent kinetic energy, and combustion of fuel in spark ignition (SI) engine. The flow simulation was performed in ANSYS using hybrid mesh for cold flow simulation to study the tumble/swirl flow variation, and for combustion simulation, a 2d axisymmetric model was used with initial swirl and tumble ratio for exploring the effect on premixed combustion. The flow simulation was performed for full combustion cycle to see the variation of tumble with crank position and speed. The combustion simulation was performed only for compression and power stroke to save the computational time. It is found that the flow inside the cylinder play a major role in preparation of homogeneous charge. Tumble and swirl majorly affect the turbulence, and increase in the tumble motion shifts the peak combustion pressure for few crank angle degrees earlier. Turbulent kinetic energy increases rapidly for higher swirl and tumble as the disturbance gets amplified with higher flow variations. Thus, more energy is added to the flow at TDC because of vortices added in the flow due to tumble breakdown, which leads to better mixing and combustion

Notes:

Vendor supplied data

Publisher Number:

2020-01-2013

Access Restriction:

Restricted for use by site license