scispace - formally typeset
Search or ask a question
Author

Jyh-Yuan Chen

Bio: Jyh-Yuan Chen is an academic researcher from University of California, Berkeley. The author has contributed to research in topics: Combustion & Ignition system. The author has an hindex of 23, co-authored 71 publications receiving 1626 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: This work proposes a methodology for the formulation of a gasoline surrogates based on the intrinsic qualities of the fuel chemical behavior, and identifies a candidate surrogate containing four components.
Abstract: The numerical study of engine combustion requires the coupling of advanced computational fluid dynamics and accurate chemical kinetic models. This task becomes extremely challenging for real fuels. Gasoline is a mixture of hundreds of different hydrocarbons. Detailed modeling of its chemistry requires huge numbers of species and reactions and exceeds present numerical capabilities. Consequently, simpler surrogate mixtures are adopted to approximate the behavior of the real fuels. Large kinetic models for surrogates are developed to characterize their chemistry, but these models still contain thousands of species and reactions and can usually only be used for simulating simple homogeneous systems. For multidimensional engine applications, they must be reduced. In this work, we propose a methodology for the formulation of a gasoline surrogates based on the intrinsic qualities of the fuel chemical behavior. Using the proposed procedure, a candidate surrogate containing four components has been identified to ...

259 citations

Book
26 May 2011
TL;DR: In this article, the authors present a review of transport equations and properties of combustion engines and demonstrate the limits of flammability of certain types of fuel, including the minimum energy required for combustion.
Abstract: Preface.- Nomenclature.- Fuel.- Thermodynamics of Combustion.- Chemical Kinetics.- Review of Transport Equations and Properties.- Ignition Phenomena.- Premixed Flames.- Non-Premixed Flames (Diffusion Flames).- Droplet Evaporation and Combustion.- Emissions.- Premixed Piston IC Engines.- Diesel Engines.- Labs.- Properties of Fuels.- Properties of Air at 1 atm.- Properties of Ideal Combustion Gases.- Elementary Reaction Mechanisms.- Summary of Limits of Flammability.- Minimum Ignition Energy.- Antoine Equation.- Flash Points for Common Fuels.- Properties of Some Alcohol Fuels and Ammonia

205 citations

Journal ArticleDOI
TL;DR: In this article, a model for the simulation of turbulent jet diffusion flames based on the One-dimensional Turbulence (ODT) model is presented, which is based on a mechanistic distinction between reaction and diffusion, implemented by the direct solution of unsteady boundary-layer reaction-diffusion equations and turbulent advection in a time-resolved simulation on a 1D domain.

125 citations

Journal ArticleDOI
TL;DR: In this article, the authors examined intermediate temperature heat release (ITHR) in homogeneous charge compression ignition (HCCI) engines using blends of ethanol and n-heptane.

88 citations

Journal ArticleDOI
TL;DR: In this article, the authors investigated the feasibility of simultaneous species and temperature measurements in turbulent dimethyl ether flames, using line-imaged Raman/Rayleigh scattering of the major species H 2, O 2, N 2, CO, CO 2, H 2 O, C 2 H 6 O and laser induced fluorescence of CO.

74 citations


Cited by
More filters
Journal ArticleDOI
TL;DR: While the book is a standard fixture in most chemical and physical laboratories, including those in medical centers, it is not as frequently seen in the laboratories of physician's offices (those either in solo or group practice), and I believe that the Handbook can be useful in those laboratories.
Abstract: There is a special reason for reviewing this book at this time: it is the 50th edition of a compendium that is known and used frequently in most chemical and physical laboratories in many parts of the world. Surely, a publication that has been published for 56 years, withstanding the vagaries of science in this century, must have had something to offer. There is another reason: while the book is a standard fixture in most chemical and physical laboratories, including those in medical centers, it is not as frequently seen in the laboratories of physician's offices (those either in solo or group practice). I believe that the Handbook can be useful in those laboratories. One of the reasons, among others, is that the various basic items of information it offers may be helpful in new tests, either physical or chemical, which are continuously being published. The basic information may relate

2,493 citations

01 Mar 1987
TL;DR: The variable-order Adams method (SIVA/DIVA) package as discussed by the authors is a collection of subroutines for solution of non-stiff ODEs.
Abstract: Initial-value ordinary differential equation solution via variable order Adams method (SIVA/DIVA) package is collection of subroutines for solution of nonstiff ordinary differential equations. There are versions for single-precision and double-precision arithmetic. Requires fewer evaluations of derivatives than other variable-order Adams predictor/ corrector methods. Option for direct integration of second-order equations makes integration of trajectory problems significantly more efficient. Written in FORTRAN 77.

1,955 citations

Journal ArticleDOI
TL;DR: In this paper, five types of models applied to HCCI engine modelling are discussed in the present paper, and specific strategies for diesel-fuelled, gasoline-fined, and other alternative fuelled combustion are also discussed.

1,068 citations

Journal ArticleDOI
TL;DR: A detailed overview of recent results on alcohol combustion can be found in this paper, with a particular emphasis on butanols and other linear and branched members of the alcohol family, from methanol to hexanols.

676 citations

Journal ArticleDOI
TL;DR: The need and prospect of incorporating realistic fuel chemistry in large-scale simulations of combustion phenomena and combustor performance are reviewed in this paper, where skeletal reduction especially through directed relation graph, time-scale reduction based on the concepts of quasi-steady species enabled through computational singular perturbation, the lumping of isomers and of species with similar diffusivities; on-the-fly stiffness removal; the relative merits of implicit versus explicit solvers; and computation cost minimization achieved through tabulation and the judicious re-sequencing of the computational steps in arithmetic evaluations.

635 citations