scholarly journals Developing of a new comprehensive spark ignition engines code for heat loss analysis within combustion chamber walls

2010 ◽  
Vol 14 (4) ◽  
pp. 1013-1025 ◽  
Author(s):  
Shahram Khalilarya ◽  
Mohammad Javadzadeh
Keyword(s):  
Combustion Chamber ◽  
Heat Loss ◽  
Spark Ignition ◽  
Spark Ignition Engines ◽  
Loss Analysis

Thermophysical Properties of Working Substance and Heat Transfer in a Hydrogen Combustion Engine

2003 ◽  
Author(s):  
T. Shudo ◽  
H. Oka
Keyword(s):  
Heat Transfer ◽  
Combustion Chamber ◽  
Heat Loss ◽  
Thermophysical Properties ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Spark Ignition ◽  
Hydrogen Combustion ◽  
Spark Ignition Engine ◽  
Combustion Engines

Hydrogen is a clean alternative to fossil fuels for internal combustion engines and can be easily used in spark-ignition engines. However, the characteristics of the engines fueled with hydrogen are largely different from those with conventional hydrocarbon fuels. A higher burning velocity and a shorter quenching distance for hydrogen as compared with hydrocarbons bring a higher degree of constant volume and a larger heat transfer from the burning gas to the combustion chamber wall of the engines. Because of the large heat loss, the thermal efficiency of an engine fueled with hydrogen is sometimes lower than that with hydrocarbons. Therefore, the analysis and the reduction of the heat loss are crucial for the efficient utilization of hydrogen in internal combustion engines. The empirical correlations to describe the total heat transferred from the burning gas to the combustion chamber walls are often used to calculate the heat loss in internal combustion engines. However, the previous research by one of the authors has shown that the widely used heat transfer correlations cannot be properly applied to the hydrogen combustion even with adjusting the constants in them. For this background, this research analyzes the relationship between characteristics of thermophysical properties of working substance and heat transfer to the wall in a spark-ignition engine fueled with hydrogen.

Modifications to Quasi-Dimensional Burning Model of Spark Ignition Engines

2009 ◽  
Author(s):  
M. R. Modarres Razavi ◽  
A. Hosseini ◽  
M. Dehnavi
Keyword(s):  
Heat Transfer ◽  
Combustion Chamber ◽  
Numerical Solution ◽  
Taylor Expansion ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Spark Ignition Engines ◽  
Algebraic Functions ◽  
Spark Plug ◽  
Burning Model

The way in which position of spark plug affects combustion in a spark ignition engine can be analyzed by using two-zone burning model. The purpose of this paper is to extract correlations to simulate the geometric interaction between the propagating flame and the general cylindrical combustion chamber. Eight different cases were recognized. Appropriate equations to calculate the flame area (Af), the burned and the unburned volume (Vb & Vu) and the heat transfer areas related to the burned and unburned regions were derived and presented for each case using Taylor expansion in order to replace numerical solution with trigonometric algebraic functions.

Geometry of Spherical Flame Propagation in a Disc-Shaped Combustion Chamber

1970 ◽  
Vol 12 (2) ◽  
pp. 146-149 ◽  
Author(s):  
W. J. D. Annand
Keyword(s):  
Combustion Chamber ◽  
Flame Propagation ◽  
Digital Computer ◽  
Combustion Process ◽  
Spark Ignition ◽  
Spark Ignition Engines ◽  
Flat Surfaces ◽  
Spherical Flame ◽  
Spherical Flame Propagation ◽  
Approximate Procedure

In performing synthesis or analysis of the combustion process in spark-ignition engines by digital computer, it is necessary to know the enflamed volume, the flame front area, and the area of the chamber surface in contact with the enflamed material, as functions of flame travel distance. This Note examines the case of spherical flame propagation in a disc-shaped chamber, with origin at any point on one of the flat surfaces. An ‘exact’ method of computation is outlined, and a simple approximate procedure, giving high accurary for this particular case, is described.

Quantitative Systems for Measuring Knock

1972 ◽  
Vol 186 (1) ◽  
pp. 575-583 ◽  
Author(s):  
V. Arrigoni ◽  
G. Cornetti ◽  
B. Gaetani ◽  
P. Ghezzi
Keyword(s):  
Combustion Chamber ◽  
Spark Ignition ◽  
Spark Ignition Engines ◽  
Pressure Oscillations ◽  
First Results

Two methods for measuring quantitatively the knock intensity in spark ignition engines are described. The measurements are based on the detection of either pressure oscillations in the combustion chamber or the engine head vibrations due to knock. Some first results are reported.

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