TY - JOUR
T1 - Prediction of in-cylinder turbulence for IC engines
AU - Celik, I.
AU - Yavuz, I.
AU - Smirnov, A.
AU - Smith, J.
AU - Amin, E.
AU - Gel, A.
N1 - Funding Information:
This work is sponsored by the US DOD Army Research Office (ARO) through the DEPSCoR Program under Grant No.: DAAH04-96-I-QI96. The discussions during various occasions by Drs. 1.M Kuhlman, S.W. Lewellen, and D.C Lewellen are also acknowledged.
PY - 2000
Y1 - 2000
N2 - This paper presents the preliminary results of some of a few of its kind efforts in large eddy simulation (LES) of engine flows to predict turbulent fluctuations, and the statistics of turbulence quantities inside IC engine cylinders. For this purpose, the well-known engine simulation code, KIVA, is used with special precautions to keep the numerical accuracy at a sufficiently high level, as well as using relatively fine grid resolution. The capabilities of this code are tested against benchmark cases, such as lid-driven cavity flow, and swirling and non-swirling free jet flows. It is then applied to a typical engine geometry under motored conditions. In particular, turbulence generated during the intake stroke, and the instabilities induced by a typical piston-bowl assembly are investigated. The computed velocity fluctuations, correlation coefficients and energy spectra of turbulent fluctuations are compared to experimental results. The predictions seem to extend well into the inertial range of turbulence and depict a good qualitative agreement with measurements. The results also shed light into the mechanisms by which turbulence may be generated by the piston-bowl assembly.
AB - This paper presents the preliminary results of some of a few of its kind efforts in large eddy simulation (LES) of engine flows to predict turbulent fluctuations, and the statistics of turbulence quantities inside IC engine cylinders. For this purpose, the well-known engine simulation code, KIVA, is used with special precautions to keep the numerical accuracy at a sufficiently high level, as well as using relatively fine grid resolution. The capabilities of this code are tested against benchmark cases, such as lid-driven cavity flow, and swirling and non-swirling free jet flows. It is then applied to a typical engine geometry under motored conditions. In particular, turbulence generated during the intake stroke, and the instabilities induced by a typical piston-bowl assembly are investigated. The computed velocity fluctuations, correlation coefficients and energy spectra of turbulent fluctuations are compared to experimental results. The predictions seem to extend well into the inertial range of turbulence and depict a good qualitative agreement with measurements. The results also shed light into the mechanisms by which turbulence may be generated by the piston-bowl assembly.
UR - http://www.scopus.com/inward/record.url?scp=0033720352&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033720352&partnerID=8YFLogxK
U2 - 10.1080/00102200008947269
DO - 10.1080/00102200008947269
M3 - Conference article
AN - SCOPUS:0033720352
SN - 0010-2202
VL - 153
SP - 339
EP - 368
JO - Combustion science and technology
JF - Combustion science and technology
IS - 1
T2 - MCS-99: 1st Mediterranean Combustion Symposium
Y2 - 20 June 1999 through 25 June 1999
ER -