This investigation deals with the EF7 (TC) engine, a dual fuel engine equipped with a turbocharger system, consequently with a high probability of knock inception. In this study, an operating cycle of the engine was simulated using KIVA-3V code. Some modifications were carried out on the KIVA method of calculating pressure in the intake port in order to simulate turbocharger pressure correctly. Auto-ignition and knock were then simulated using the auto-ignition integral model. The modified code and the simulation were verified using three different methods; in-cylinder average pressure, gas temperature of the exhaust port, and auto-ignition timing. The simulation results using the auto-ignition integral model, as compared with the experimental data, proved to be reasonably accurate. Following this validation, the effect of the knock phenomenon on the engine heat transfer through the walls was investigated. The simulations showed that the rate of heat transfer through the walls under knocking conditions is about 2.2 times higher than that under normal conditions. However, it was also shown that the total heat transfer increases about 15%.

References

References
1.
Worret
,
R.
,
Bernhardt
,
S.
,
Schwarz
,
F.
, and
Spicher
,
U.
,
2002
, “
Application of Different Cylinder Pressure Based Knock Detection Methods in Spark Ignition Engines
,”
SAE
Paper No. 2002-01-1668.
2.
Zhen
,
X.
,
Wang
,
Y.
,
Xu
,
S.
,
Zhu
,
Y.
,
Tao
,
C.
,
Xu
,
T.
, and
Song
,
M.
,
2012
, “
The Engine Knock Analysis—An Overview
,”
Appl. Energy
,
92
, pp.
628
636
.
3.
Chun
,
K. M.
, and
Kim
,
K. W.
,
1994
, “
Measurement and Analysis of Knock in a SI Engine Using the Cylinder Pressure and Block Vibration Signals
,”
SAE
Paper No. 940146.
4.
Ollivier
,
E.
,
Bellettre
,
J.
,
Tazerout
,
M.
, and
Roy
,
G. C.
,
2006
, “
Detection of Knock Occurrence in a Gas SI Engine From a Heat Transfer Analysis
,”
Energy Convers. Manage.
,
47
(
7–8
), pp.
879
893
.
5.
Grandin
,
B.
, and
Denbratt
,
I.
,
2002
, “
The Effect of Knock on Heat Transfer in SI Engines
,”
SAE
Paper No. 2002-01-0238.
6.
Rente
,
T.
,
Golovichev
,
V. I.
, and
Denbratt
,
I.
,
2001
, “
Effect of Injection Parameters on Auto-Ignition and Soot Formation in Diesel Sprays
,”
SAE
Paper No. 2001-01-3687.
7.
Amsden
,
A. A.
,
1993
, “
KIVA-3: A KIVA Program With Block-Structured Mesh for Complex Geometries
,” Los Alamos National Laboratory, Los Alamos, NM, Report No. LA-12503-MS.
8.
Gharehghani
,
A.
,
Mirsalim
,
M.
,
Jazayeri
,
A.
, and
Ghanbari
,
M.
,
2010
, “
Numerical Simulation of a New Dual Fuel (Diesel–Gas) D87 Engine With Multi-Dimensional CFD Model
,” CIMAC Paper No. 233.
9.
Shao
,
J.
, and
Rutland
,
Ch. J.
,
2015
, “
Modeling Investigation of Different Methods to Suppress Engine Knock on a Small Spark Ignition Engine
,”
ASME J. Eng. Gas Turbines Power
,
137
(
6
), p.
061506
.
10.
Amsden
,
A. A.
,
1997
, “
KIVA-3V: A Block-Structured KIVA Program for Engines With Vertical or Canted Valves
,” Los Alamos National Laboratory, Los Alamos, NM, Report No. LA-13313-MS.
11.
Amsden
,
A. A.
,
1999
, “
KIVA-3V, Release 2, Improvements to KIVA-3V
,” Los Alamos National Laboratory, Los Alamos, NM, Report No. LA-13608-MS.
12.
Rostampour
,
A.
,
2014
, “
Numerical Investigation of the Effect of Knock on Heat Transfer in a SI Engine
,” M.Sc. thesis, Iran University of Science and Technology, Tehran, Iran.
13.
Vavra
,
J.
,
Bohac
,
S. V.
,
Manofsky
,
L.
,
Lavoie
,
G.
, and
Assanis
,
D.
,
2012
, “
Knock in Various Combustion Modes in a Gasoline-Fueled Automotive Engine
,”
ASME J. Eng. Gas Turbines Power
,
134
(
8
), p.
082807
.
14.
Gharehghani
,
A.
,
2010
, “
CFD Modeling of Dual Fuel Engine Combustion With KIVA-3V
,” M.Sc. thesis, Amirkabir University of Technology, Tehran, Iran.
15.
Douaud
,
A. M.
, and
Eyzat
,
P.
,
1978
, “
Four-Octane-Number Method for Predicting the Anti-Knock Behavior of Fuels and Engines
,”
SAE
Paper No. 780080.
16.
Liu
,
H.
,
Wang
,
J.
,
Wang
,
J.
,
Wang
,
M.
, and
Yang
,
W.
,
2015
, “
Controlled SSCI With Moderate End-Gas Auto-Ignition for Fuel Economy Improvement and Knock Suppression
,”
ASME J. Eng. Gas Turbines Power
,
137
(
10
), p.
101508
.
17.
Karim
,
G. A.
,
2004
, “
A Dimensionless Criterion for Predicting the Onset of Knock in Spark Ignition Engines
,”
SAE
Paper No. 780080.
18.
Syrimis
,
M.
,
1996
, “
Characterization of Knocking Combustion and Heat Transfer in a Spark Ignition Engine
,” Ph.D. thesis, University of Illinois, Chicago, IL.
You do not currently have access to this content.