Effects of Spark Advance, A/F Ratio and Valve Timing on Emission and Performance Characteristics of Hydrogen Internal Combustion Engine

Abstract

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A Comparative Study of NOx Computation Methods Coupled to Quasi-Dimensional Models in SI Engines

“…Development of robust, computationally-efficient, physicsbased modeling tools can greatly aid the design/analyses and optimization of current and next-generation engines using various fuels such as natural gas and other fuel-additive blends. Several authors have studied various aspects of performance and emissions of traditional fuels and fuel-blends both experimentally and numerically [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Experimental studies are useful in validating and calibrating numerical models.…”

“…NO x computations coupled to quasidimensional models serve as important design/analyses tools. These NO x computations are conducted using equilibrium assumptions [10][11][12][13][14], or finite-rate chemistry using the extended Zeldovich mechanism for NO x formation with several simplifying assumptions [5][6]. This approach is referred to as simplified finite-rate chemistry in this work.…”