Advanced Simulation Methodologies for Hydrogen Combustion Engines

2021 ◽  
Vol 14 (4) ◽  
pp. 46-51
Author(s):  
Avnish Dhongde ◽  
Patrick Recker ◽  
Harsh Sankhla ◽  
Lukas Virnich
Keyword(s):  
Hydrogen Combustion ◽  
Combustion Engines

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.

Evaluation of Heat Transfer Models With Measurements in a Hydrogen-Fuelled Spark Ignition Engine

2010 ◽  
Author(s):  
Joachim Demuynck ◽  
Sebastian Verhelst ◽  
Michel De Paepe ◽  
Henk Huisseune ◽  
Roger Sierens
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Thermodynamic Model ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Hydrogen Combustion ◽  
Spark Ignition Engine ◽  
Combustion Engines ◽  
Combustion Properties ◽  
Transfer Models

Hydrogen-fuelled internal combustion engines are still investigated as an alternative for current drive trains because they have a high efficiency, near-zero noxious and zero tailpipe greenhouse gas emissions. A thermodynamic model of the engine cycle enables a cheap and fast optimization of engine settings for operation on hydrogen. The accuracy of the heat transfer sub model within the thermodynamic model is important to simulate accurately the emissions of oxides of nitrogen which are influenced by the maximum gas temperature. These emissions can occur in hydrogen internal combustion engines at high loads and they are an important constraint for power and efficiency optimization. The most common models in engine research are those from Annand and Woschni, but they are developed for fossil fuels and the heat transfer of hydrogen differs a lot from the classic fuels. We have measured the heat flux and the wall temperature in an engine that can run on hydrogen and methane and we have investigated the accuracy of simulations of the heat transfer models. This paper describes an evaluation of the models of Annand and Woschni with our heat flux measurements. Both models can be calibrated to account for the influence of the specific engine geometry on the heat transfer. But if they are calibrated for methane, they fail to calculate the heat transfer for hydrogen combustion. This demonstrates the models lack some gas or combustion properties which influence the heat transfer process in the case of hydrogen combustion.

scholarly journals The Risk of Hydrogen Explosion an a Submarine Part 3 Production of Hydrogen Mixes

2017 ◽  
Vol 58 (1) ◽  
pp. 1-12
Author(s):  
Ryszard Kłos
Keyword(s):  
High Risk ◽  
Hydrogen Combustion ◽  
Combustion Engines ◽  
Production Of Hydrogen ◽  
Technical Issues ◽  
High Risk Project

Abstract This series of articles presents the problems associated with the conduction of a high-risk project aimed at modernising the hydrogen combustion engines on a submarine. The article describes technical issues connected with obtaining hydrogen-air mixes.

scholarly journals On the applicability of empirical heat transfer models for hydrogen combustion engines

2011 ◽  
Vol 36 (1) ◽  
pp. 975-984 ◽  
Author(s):  
J. Demuynck ◽  
M. De Paepe ◽  
H. Huisseune ◽  
R. Sierens ◽  
J. Vancoillie ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Hydrogen Combustion ◽  
Combustion Engines ◽  
Transfer Models

New Heat Transfer Equation Applicable to Hydrogen-Fuelled Engines

2002 ◽  
Author(s):  
T. Shudo ◽  
H. Suzuki
Keyword(s):  
Heat Transfer ◽  
Transfer Equation ◽  
Hydrogen Combustion ◽  
Combustion Engines ◽  
Heat Transfer Equation ◽  
Gas Velocity ◽  
Hydrocarbon Combustion ◽  
Rate Of Heat Release ◽  
Experimental Values ◽  
New Equation

Equations to describe heat transfer from burning gas to a combustion chamber have been empirically derived from hydrocarbon combustion engines. Previous research has analyzed the applicability of the equations to hydrogen combustion and showed that they calculate a lower cooling loss than experimental values. By focusing on the gas velocity term in the heat transfer equation and investigating replacement terms to better fit to hydrogen combustion, a new equation including rate of heat release in the gas velocity term is proposed. It is shown that the new equation is more applicable to hydrogen combustion than the widely used Woschni’s equation.

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