Results 231 to 240 of about 639,212 (278)

TURBULENCE AND TURBULENT COMBUSTION IN SPARK-IGNITION ENGINES

Progress in Energy and Combustion Science, 1976
Publisher Summary The turbulent flow field in an engine plays an important role in determining its combustion characteristics and thermal efficiency. The details of the turbulence structure in the engine are needed for determining heat transfer rates, ignition delay times, minimum ignition energy, and the rate of mixing and burn-up of quench layers ...
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Aspects of turbulent combustion

15th Aerospace Sciences Meeting, 1977
A complete second-order closure program for the investigation of chemically reacting turbulent flowfields is being developed. Many of the turbulence models being used have been developed and tested during previous studies of a variety of incompressible and compressible shear flows.
A. VARMA, E. FISHBURNE, C. DONALDSON
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Control of Turbulence in Combustion

1989
Passive shear-flow control methods are being investigated to enhance turbulence for subsonic combustion. In this paper, two control methods are discussed. These methods were developed in subsonic nonreactlng flows and verified in subsonic combustion processes to avoid combustion Instabilities in a dump combustor.
K. C. Schadow, E. Gutmark, T. P. Parr, D. M. Parr, K. J. Wilson   +4 more
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Combustion Physics: Turbulent combustion modelling

Physics Bulletin, 1984
Turbulent combustion modelling as a major distinctive topic has been with us now for more than ten years. Increasingly it has attracted the interest of fluid dynamicists and applied mathematicians, groups without established interests in chemically reacting flows.
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In-cylinder motion and turbulent combustion

1999
The induction of air or an air/fuel mixture into the engine cylinder leads to a complex fluid motion. There can be an ordered air motion such as swirl, but always present is turbulence. The bulk air motion which approximates to a forced vortex about the cylinder axis is known as axial swirl, and it is normally associated with direct injection diesel ...
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Turbulent Spray Combustion

2017
Understanding turbulence is one of the most difficult topics in science and engineering. This is because turbulent spray combustion involves many areas of physics and chemistry which accompany a variety of mathematical challenges. Defining the various length and timescales existing in turbulent flow provides a better way to understand and characterize ...
Seong-Young Lee, Ahmed Abdul Moiz, Khanh D. Cung   +2 more
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Turbulent combustion modelling

Progress in Energy and Combustion Science, 1988
Abstract This paper attempts to review and discuss the current status of the art in turbulent combustion modelling. A description of our present physical and experimental knowledge of the structure of turbulent flames is presented first in order to help the further discussions of models on a physical basis.
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Microscales of turbulent combustion

Progress in Energy and Combustion Science, 1995
Abstract A novel approach leading to the microscales of complex turbulent flows is reviewed. The approach is illustrated in terms of the classical microscales proposed by Taylor, Kolmogorov, Oboukhov-Corrsin and Batchelor. A thermal mesomicroscale between the Kolmogorov and Batchelor scales, η θ =(η η 2 B ) 2 3 is
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Turbulent Combustion Modelling

1999
Turbulent combustion, or, more generally, turbulent reacting flows, is a phenomenon of importance in both nature and technology. For example, in nature, forest fires are an important aspect of the evolution of a forest ecosystem (see figure 8.1). In another example, the dispersion of man-made pollutants into the atmosphere and oceans, and subsequent ...
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Structure and Dynamics of Highly Turbulent Premixed Combustion

Progress in Energy and Combustion Science, 2021
Xinyu Zhao, Adam M. Steinberg, Peter Edward Hamlington   +2 more
exaly