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1 edition of Numerical model of high intensity confined hydrocarbon flames found in the catalog.

Numerical model of high intensity confined hydrocarbon flames

Numerical model of high intensity confined hydrocarbon flames

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Published in Haifa, Israel : Department of Aeronautical Engineering, Technion, Israel Institute of Technology, 1978 .
Written in English


Edition Notes

StatementH.A. Arbib ... [et al.].
SeriesT.A.E. [report] ; no. 322
Classifications
LC ClassificationsMLCM 83/4748 (T)
The Physical Object
Paginationii, 61 leaves : graphs ; 27 cm.
Number of Pages61
ID Numbers
Open LibraryOL4446612M
LC Control Number79108580

Numerical investigation of the flow and flame structure in an axisymmetric trapped vortex combustor Fuel, Vol. Large Eddy Simulation of turbulent flames in a Trapped Vortex Combustor (TVC) – A flamelet presumed-pdf closure preserving laminar flame speed. The mixing of fresh gas with recirculating combustion products and the stabilization of the methane flame are discussed in detail. The presented findings deliver important information for the understanding of confined jet flames operated with different fuels. The obtained data sets can be used for the validation of numerical simulations as well.

characterization of the flame model can be made using the models proposed by Thomas [12] and Moorhouse [13]. Apparently, when developing the effective emissive power of a flame it is vital to exclusively adopt a given methodology. Table 1 summarises the discrepancies in the flame height model based on Heskestad [11] and Thomas [12] for the zero.   The lower concentration limit of flammability of hydrocarbon-air mixtures has been studied experimentally and by numerical simulation. Simulation using a detailed mechanism of chemical reactions has shown that calculations results are in good agreement with experimental data on the effect of water vapor on the lean concentration limit of flammability of hydrocarbon mixtures with air.

Patankar, S. V., , Numerical Heat Transfer and Fluid Flow, 1st Edition, Hemisphere, Washington, DC. Rawson, S. A., , “An Experimental Investigation of the Influence of High Intensity Acoustics on Heat and Mass Transfer Rates from Spheres as Related to Coal-Water Slurry Fuel Combustion Enhancement,” M.S. thesis, The Pennsylvania. hydrocarbon in the flame. Also, high concentration of hydrocarbons injected at high rates tends to reduce the linearity of the flame. It can be seen that a high rate of sample injection (40 cc/min) is not always possible. For applications where the high sample injection rate is not satisfactory, the hydrocarbon analyzer provides for.


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Numerical model of high intensity confined hydrocarbon flames Download PDF EPUB FB2

COMBUSTION AND FLAME () A Numerical Model of High Intensity Confined Hydrocarbon Combustion H. ARBIB*, Y. GOLDMAN, J. GREENBERG, and Y. TIMNAT Department of Aeronautical Engineering, Technion--lsrael Institute of Technology, Haifa, Israel A computer program was developed for the solution of the set of elliptic nonlinear partial Cited by: Book review Full text access Combustion and Mass Transfer.

A textbook with multiple-choice exercises for engineering students: D. Spalding, Pergamon Press, Oxford,vii + pp., $ (Hardcover), $ (Softcover).

A numerical model of high intensity confined hydrocarbon combustion. Combustion and Flame38, (80) Cited by: Numerical Analysis of Exhaust Emission from an Aero Gas Turbine Combustor under Fuel-Rich Condition. A phalanx flame model for the combustion of composite solid propellants.

Analogue for High-Intensity Steady-Flow Combustion Phenomena. A numerical model of high intensity confined hydrocarbon combustion. Article. Dec ; [ 16] also utilised this technique for investigating high intensity confined hydrocarbon flames. Homogeneous Combustion (HC) and its variants (MILD, FLOX, CDC etc.) have emerged as attractive techniques to abate NOx emissions.

The underlying theory is the arrest of Damköhler number (Da) to values close to unity by intense dilution (internal or external) of the reactant main research problem addressed in this work is the attainment of HC with enriched oxidizers (X O 2.

A phalanx flame model for the combustion of composite solid propellants. Turbulent mass transfer and rates of combustion in confined turbulent flames. Symposium (International) on Combustion9 (1), DOI: /S(63) Analogue for High-Intensity.

Pressure measurements in the combustor are taken using three Kulite MIC high-intensity microphones mounted in semi-infinite line configurati 54 and cm downstream of the chokeplate.

Video images of the flame at speeds up to fps are captured using a Phantom v high-speed camera. Turbulent premixed hydrocarbon flames in the thin and distributed reaction zones regimes are simulated using both Direct Numerical Simulations (DNS) and Large Eddy Simulations (LES).

A series of DNS is performed to study the transition from the thin reaction zones regime to the distributed reaction zones regime. Differential diffusion effects, distributed burning, and local extinctions are. Direct Numerical Simulations (DNS) have been conducted to study the response of initially laminar spherical premixed methane–air flame kernels to successively higher turbulence intensities at five different equivalence ratios.

The numerical experiments include a species/step skeletal mechanism for methane oxidation and a multicomponent molecular transport model. The Damköhler number was ≤ Da ≤ 1, and the ratio of turbulent intensity to laminar burning velocity was 28 ≤ u′/SL ≤indicating the combustion occurs in the high-intensity.

Descriptions are provided for the basic kinetic model types of the chemical reactions used in combustion process investigations. The paper includes an extensive selection of global high-temperature gas-phase chemical reaction parameters. Consequently, a large proportion of numerical studies of hydrocarbon flames is confined either to simple and/or two-dimensional flows with full chemical kinetic schemes (see [12] and references.

This paper investigates the effect of hydrogen addition and swirl intensity and equivalence ratio on characteristics of premixed C3H8-air flame, in a model burner.

The numerical simulation is. This paper describes an experimental and numerical study of the emission of nitrogen oxides (NO x) from the lean premixed (LPM) combustion of gaseous fuel alternatives to typical pipeline natural gas in a high intensity, single-jet, stirred reactor (JSR).In this study, CH 4 is mixed with varying levels CO 2 and N x measurements are taken at a nominal combustion temperature of K.

The mean value of C2* and CH*, which indicated the reaction intensity in the hydrocarbon flames, decreased with decreasing pressure index for Φ ≤ 1, but increased with decreasing pressure index.

High Intensity Combustors - Steady Isobaric Combustion The present book offers specific knowledge on high intensity combustors and provides those who are interested in the area of fuel preparation and combustion, flow and heat transfer, and particularly in high temperature materials with a deep understanding of the fundamental physics.

confined swirling spray flames by vibrational anti-Stokes Raman spectroscopy, numerical models are the key step to improve design tools. However, the effects of individual hydrocarbons, hydrocarbon groups, and their ratio in blends on combustion processes are not To generate a high-intensity and coherent signal beam.

This numerical investigation quantifies the self-dilution in confined flames in terms of the inner diameter of furnace, and verifies correctly that the enhancement of self-dilution decreases the flame temperature and thereby, NOx emission.

Thus, this technique has a high potential to NOx reduction in confined flames. さらに表示 部分表示. Search Bibliography. Filter by: Year. select. Swirl has been commonly used for the stabilisation of high intensity combustion which acts as a source to improve flame stability, reduce combustion lengths, ensure minimum maintenance and extend life for the unit [9].

Unlike the jet flames, most significant effects of swirling flow are produced by recirculation.Email your librarian or administrator to recommend adding this book to your organisation's collection. Combustion Waves and Fronts in Flows. Premixed flames in large scales and high intensity turbulent flow.

J. Phys. Lett., 44, L-1–L Stability analysis of confined V-shaped flames in high velocity streams. Phys. Rev. E,   A numerical model was developed during the course of the study to simulate the flow and transport of the hydrocarbon pollutants in the groundwater of the study area with the passage of time.

The scenarios simulated indicate the do nothing approach will likely not achieve the target water quality within 50 years and neither would source removal.