TY - JOUR
TI - Developing of a new comprehensive spark ignition engines code for heat loss analysis within combustion chamber walls
AU - Khalilarya Shahram
AU - Javadzadeh Mohammad
JN - Thermal Science
PY - 2010
VL - 14
IS - 4
SP - 1013
EP - 1025
PT - Article
AB - The objective of this work is to develop the existing a zero-dimensional  model named ODES to provide detailed insights into the internal process of  the modern high speed spark ignition engines. Therefore, it has been  concentrated on the development of new sub models for incorporation in an  extended form of ODES, as follows: - The existing semi-empirical combustion  model has been replaced by a new comprehensive model, which is based on the  turbulent flame speed in the combustion chamber. - The existing three wall  heat transfer model has been replaced by a new one in which, the combustion  chamber is divided in to three zones including cylinder head, cylinder wall,  and piston head. The steady-state heat transfer equation is solved through  finite difference method with replaced boundary and initial conditions. The  results gave the temperature distribution of combustion chamber walls. The  rate of heat losses from combustion chamber to the coolant is calculated by  using the mean temperature of each part. The code has been extensively  validated with respect to performance and heat transfer against experimental  results obtained on XU7JP spark ignition engine with two kinds of fuel,  gasoline and compressed natural gas and gave good agreement with available  experimental.