2 edition of Modeling of laminar flames in mixtures of vaporized liquefied natural gas (LNG) and air found in the catalog.
Modeling of laminar flames in mixtures of vaporized liquefied natural gas (LNG) and air
Charles K Westbrook
by Dept. of Energy, Lawrence Livermore Laboratory, [Sringfield, Va., for sale by the National Technical Informaion Service] in [Livermore, Calif.]
Written in English
|Statement||Charles K. Westbrook,|
|Series||UCID ; 18540|
|Contributions||United States. Dept. of Energy, Lawrence Livermore Laboratory|
|The Physical Object|
|Pagination||10 p. :|
|Number of Pages||10|
Laminar flame speed S L is the propagation velocity of a laminar flame front into the unburned premixed gas. It depends on the fuel type, air-fuel ratio, temperature and pressure. It can be calculated with good approximation by kinetic mechanisms for various fuels (see Table , here GRI chemical reaction mechanism is used (Smith et laminar flame speed is maximal near. Report topics are: simulation of LNG vapor spread and dispersion by finite element methods; modeling of negatively buoyant vapor cloud dispersion; effect of humidity on the energy budget of a liquefied natural gas (LNG) vapor cloud; LNG fire and explosion phenomena research evaluation; modeling of laminar flames in mixtures of vaporized.
Different kinds of explosions are driven by the internal energy accumulated in compressed gas or superheated liquid. A well-known example of such an explosion is the burst of a vessel with pressure-liquefied substance, known as Boiling Liquid Expanding Vapor Explosion (BLEVE). Hot BLEVE accident is caused mainly by direct heating (pool fire or jet fire) of the steel casing at the vapor side of Author: Alon Davidy. laminar burning velocity and flammability limits state of the art research for biogas and biogas mixtures with other fuels, with the perspective of application as an ICEs fuel. LAMINAR BURNING VELOCITY Laminar burning velocity, also referred to as laminar flame speed, S .
Laminar burning velocity of liquefied petroleum gas (LPG) air mixtures at high temperatures is extracted from the planar flames stabilized in the preheated meso-scale diverging channel. The experiments were carried out for a range of equivalence Computational predictions of burning velocity and detailed flame structure were performed using Cited by: 1. LAMINAR FLAME SPEEDS OF SYNTHETIC GAS FUEL MIXTURES J. Natarajan, S. Nandula, T. Lieuwen, and J. Seitzman School of Aerospace Engineering Georgia Institute of Technology Atlanta, GA ABSTRACT Laminar flame speeds of H2/CO/CO2 mixtures have been measured over a range of fuel compositions, lean equivalence.
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Modeling of laminar flames in mixtures of vaporized liquefied natural gas (LNG) and air (Book, )  Get this from a library. Modeling of laminar flames in mixtures of vaporized liquefied natural gas (LNG) and air.
[Charles K Westbrook; United States. Analytical Correlations for Modeling the Laminar Flame Speed of Natural Gas Surrogate Mixtures. of the Italian Ther al Machines Engineering Association, ATI, SeptemberLecce, Italy Analytical Correlations for Modeling the Laminar Flame Speed of Natural Gas Surrogate Mixtures R.
Amirante1, E. Distaso1*, P. Tamburrano1 and R. D Cited by: 5. The present work reports the measurement of the laminar burning velocity of liquefied petroleum gas (LPG)–air mixtures at high temperatures using the planar flame propagation mode appearing in the preheated mesoscale diverging channel.
The experiments were carried out for a range of equivalence ratios, ≤ Φ ≤ The present data for LPG–air mixtures are reported for a temperature Cited by: The present work investigates the effect of adding small amounts of humidity on the inhibition of natural gas-air flames.
The inhibition is quantified by measuring and calculating the laminar burning velocities (S u) of premixed ames from a C 1-C 2 mechanism. The experimental apparatus consists of a Mache-Hebra burner, equipped with flow controllers and air purification by: laminar flame speed measurements were performed for various methane and natural gas surrogate blends with significant amounts of hydrogen at elevated pressures (up to 5 atm) and.
MODELLING OF PREMIXED LAMINAR FLAMES USING FLAMELET-GENERATED MANIFOLDS J. van Oijen and L. de Goey Eindhoven University of Technology, Dept. of Mechanical Engineering, PO BoxMB Eindhoven, The Netherlands Revised J Corresponding author: J. van Oijen E-mail: @ Telephone: + 31 40 Fax. natural gas, only a few papers deal with the laminar flame velocity of mixtures containing these species.
InLiao (21) reported some values about the laminar flame velocity of a Chinese natural gas (% (vol) CH4, % C2H6, % C3H8, % CO2, and % others). InHuang (22)Cited by: burning velocity from the flame speed and velocity of unburned gas measurements in closed vessel.
[Bradley and Hundey, ] used hot wire anemometer to measure the gas velocity ahead of the flame front in methane – air explosions. The flame speed may be measured using ionization probes or by flame Size: 1MB.
Laminar Premixed Flames • A premixed flame is self-sustaining propagation of a localized combustion zone at subsonic velocities. • We use the term deflagration in gasdynamics to define a premixed flame travelling at subsonic velocities. • Consider a premixed flammable mixture in a long tube, open at both ends, ignited from one end.
Also, laminar flame speed is often used to characterize the combustion of various fuel-oxidizer combinations. Therefore, the ability to model chemical kinetics and transport processes in these flames is critical to interpreting flame experiments and to understanding the combustion process itself.
Examples of the use of flame modelingFile Size: KB. numerical modeling with a detailed kinetic mechanism of a co-flow axis-symmetric laminar C2H4/air flame (experimentally studied in ) are presented.
Numerical methods The OpenFOAM® framework  is used to solve the usual gas-phase transport equations of continuity, momentum, energy and species mass fractions (not here reported) .File Size: KB.
Flame propagation was studied in methane-air-inert (He, Ar, N 2 or CO 2) mixtures with various initial pressures and compositions using pressure-time records obtained in a spherical vessel with central laminar burning velocities of CH 4-air and CH 4-air-inert mixtures obtained from experimental p(t) records of the early stage of combustion were compared with literature data and Cited by: Propagation of Laminar Flames in Wet Premixed Natural Gas-Air Mixtures Article (PDF Available) in Process Safety and Environmental Protection 76(2) May with 78 Reads.
used in the FLACS model for combustion. The model assumes that an explosion can be represented by many small flamelets, which can be considered laminar. velocity models are one of the three input parameters for this program and they are a function of the gas mixture, temperature, and Size: 1MB.
The purpose is to provide simple and workable expressions for modeling the laminar flame speed of practical fuels used in spark-ignition engines. Pure compounds, such as methane and propane.
The present work concerns the study of rich laminar premixed CH 4 /C 2 H 6 /C 3 H 8 /O 2 /N 2 flames operating at two equivalence ratios (ϕ = and ) and low pressure (80 Torr). In the case of the flame ϕ =the influence of pressure was studied between 80 and by: 3. Models for Land Based Liquefied Natural Gas Spills Washington, DC F d e r a l s E n e r g R e g u l a t o r y C o m m i s i n Office of Energy Projects January Docket No.
AD Recommended Parameters for Solid Flame Models for Land Based Liquefied Natural Gas Spills TABLE OF CONTENTS v density of LNG vapor, File Size: 1MB.
Modeling the Laminar Flame Speed of Natural Gas and Gasoline Surrogates An unified model with a single set of kinetic parameters has been proposed for modeling laminar flame velocities of several alkanes using detailed kinetic mechanisms automatically generated by the EXGAS by: 5.
The burning velocities of liquefied petroleum gas (LPG)−air and LPG−air−exhaust mixtures were calculated from pressure−time records obtained in a spherical vessel with central ignition, using a recent correlation based on the cubic law of pressure rise during the early stage of explosion.
The burning velocities of LPG−air mixtures with a variable fuel/oxygen ratio at ambient initial Cited by: In this paper, outwardly propagating spherical flames were employed to observe the laminar flame characteristics of the gaseous mixtures composed of simulated RE fuel (mixture of 75%.
The laminar burning velocity of liquefied petroleum gas (LPG) air mixtures at high temperatures is extracted from the planar flames stabilized in the preheated mesoscale diverging channel. The experiments were carried out for a range of equivalence ratios and mixture by: The reaction zone area is employed to calculate the laminar flame speed.
The initial temperature and pressure of fuel air mixtures are K and 1 atm. The laminar flame speeds of hydrogen/air mixture and natural gas/air mixture reach their maximum values and m/s when equivalence ratios equal to andby: Laminar flame speeds of natural gas-carbon monoxide-air mixtures are calculated by CHEMKIN II with GRI Mech over a large range of fuel compositions, equivalence ratios, and initial temperatures.
The calculated results of natural gas are compared with previous experimental results that show a good agreement. The calculated laminar flame speeds of natural gas-carbon monoxide-air mixtures Cited by: 1.