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3 edition of Ignition delay times of benzene and toluene with oxygen in argon mixtures found in the catalog.

Ignition delay times of benzene and toluene with oxygen in argon mixtures

Ignition delay times of benzene and toluene with oxygen in argon mixtures

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Published by National Aeronautics and Space Administration, For sale by the National Technical Information Service in [Washington, DC], [Springfield, Va .
Written in English

    Subjects:
  • Benzene.,
  • Toluene.

  • Edition Notes

    StatementAlexander Burcat, Christopher Snyder, and Theodore Brabbs.
    SeriesNASA technical memorandum -- 87312
    ContributionsSnyder, Christopher., Brabbs, Theodore A., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17100722M

    Here, this study reports the autoignition delay times of methyl butanoate in argon–air (i.e. Ar/O 2 = by mole) mixtures under thermodynamic conditions relevant to compression ignition engines, using a rapid compression machine (RCM). The ignition delay times were obtained for the compressed temperature range of – K and. Auto Ignition Temperature. Auto Ignition Temperature The Auto-Ignition Temperature - or the minimum temperature required to ignite a gas or vapor in air without a spark or flame being present - are indicated for some common fuels below.

    This book is opinionated. I have not hesitated to give my own opin­ ion of a program, or of the intelligence —or lack of it —of the pro­ posals made by various individuals. I make no apology for this, and can assure the reader that such criticism was not made with the ad­ vantage of hindsight. At one point, in writing this book, when. Experimental and modelling studies on the high‐temperature oxidation of benzene have been done to study the effect of argon dilution on its pre‐ignition thermochemical kinetics. The ignition delay times of stoichiometric C6H6/O2 mixtures are measured behind reflected shock waves at a total pressure of 4 bar with varying argon dilution (0–95%) for a wide range of temperatures (–

    The limiting oxygen concentration and flammability limits of gases and gas mixtures Isaac *A. Zlochower, * Corresponding author. Tel.: þ1 ; fax: þ1 E-mail address: [email protected] (I.A. Zlochower). Gregory M. Green. Pittsburgh Research Laboratory, National Institute for Occupational Safety and Health, Pittsburgh, PA. Ignition delay times {tau}{sub ign} were measured behind reflected shock waves in mixtures with air at {phi}= and at p=40 bar, over a temperature range of T= K and compared to numerical results using two different mechanisms.


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Ignition delay times of benzene and toluene with oxygen in argon mixtures Download PDF EPUB FB2

For benzene-oxygen-argon and toluene-oxygen-argon mixtures. Although ignition delay times are crude information and nonspecific of any distinct occurrence in the oxidation kinetics, ignition delay experiments are basic, highly repro- ducible, and Instrument independent.

Because of their positive properties and despite their drawbacks, ignition. The ignition delay times of benzene and toluene with oxygen diluted in argon were investigated over a wide range of conditions.

For benzene the concentration ranges were to percent fuel. Get this from a library. Ignition delay times of benzene and toluene with oxygen in argon mixtures. [A Burcat; Christopher A Snyder; Theodore A Brabbs.

start and end of ignition delay time T. Benzene mixture 11T5, K Figure 2. - Log of ignition delay time versus reciprocal reflected tem- perature for benzene mixtures B and C, outlining oxygen power de- pendence. also computed with reasonable success experimental ignition delay times measured behind a reflected shock wave for lean, stoichiometric, and rich benzene-oxygen-argon mixtures (Burcat, Snyder, and Brabbs, ).

The complete Emdee mechanism computes species profiles for the toluene oxidation which agree with experimental data measured at K. COMBUSTION AND FL () Calculation of the Ignition Delay Times for Methane-Oxygen-Nitrogen Dioxide-Argon Mixtures ALEXANDER BURCAT Department of Aeronautical Engineering, Teehnion-Israel Institute of Technology, Haifa, Israel The experimental ignition delay values of methane-oxygen-argon-nitrogen dioxide mixtures published re- cently are.

isomers of xylene (ortho- meta- and para-xylenes). For each compound, ignition delay times of hydrocarbon-oxygen-argon mixtures with fuel equivalence ratios from to 2 were measured behind reflected shock waves for temperatures from to K and pressures from to 9 bar.

The results show a similar reactivity for the three isomers. atm and for different benzene-oxygen-argon mixtures. Figure 1: Auto-ignition delay times of benzene in a shock tube.

Semi-log plot of experimental (symbols) and computed (lines) ignition delays as a function of temperature behind the reflected shock wave for different equivalence ratios at % of benzene (Da Costa et al., ).

1 10   Ignition delay times for n-dodecane/air and n-dodecane/21% O 2 /argon are shown in Fig. 4a and b. A pressure scaling of P − is found for the air experiments (for all data except the Shen et al.

40 atm air data at the lowest temperatures), and a scaling of P. Autoignition delay time measurements were performed for toluene/oxygen/argon mixtures at pressures of approximately and atm, temperatures of – K, oxygen mole fractions of   A.

Burcat, C. Snyder, and T. Brabbs, “Ignition Delay Times of Benzene and Toluene with Oxygen in Argon Mixtures,” NASA Technol. Memorandum (). Google Scholar Ignition delay times of cyclopentene-oxygen-argon mixtures were measured behind reflected shock waves.

Mixtures contained or 1 % of hydrocarbons for equivalence ratios ranging from to Reflected shock waves conditions were: temperatures from to.

Book Search tips Selecting this option will search all publications across the Scitation platform Selecting this option will search all publications for the Publisher/Society in context.

Ignition of Benzene–Oxygen–Argon and Benzene–Oxygen–Nitrogen Mixtures. Ignition delay times of benzene and toluene with oxygen in argon mixtures.

Investigation of laminar pressurixed flames for soot model validation using SV-CARS and LII. Kinetic modeling of soot formation with detailed chemistry and physics: Laminar premixed flames of c2 hydrocarbons. The rate constants for the reactions of OH radicals with benzene and toluene have been measured directly by a shock tube/pulsed laser-induced fluorescence imaging method at high temperatures.

The OH radicals were generated by the thermal decomposition of nitric acid or tert-butyl hydroperoxide. The derived Arrhenius expressions for the rate constants were k(OH + benzene) = × exp. The ignition of n-heptane, n-decane, n-dodecane, and n-tetradecane has been investigated in a heated shock tube.

n-Alkane/air mixtures at Φ =, and were studied in reflected shock experiments at 9−58 atm and − K. Ignition times were measured using a combination of endwall electronically excited OH emission and sidewall pressure measurements.

Pang G.A., Davidson D.F., Hanson R.K.: Experimental study and modeling of shock tube ignition delay times for hydrogen oxygen argon mixtures at low temperatures. Proc. Combust. Inst. 32, – () Article; Google Scholar. Burcat A., Snyder C., Brabbs T., Ignition Delay Times of Benzene and Toluene with Oxygen in Argon Mixtures, NASA Technical Memorandum, N ().

Breuer A., et al., Investigations of the Influence of Turbulence and Type of Fuel on the Evaporation and Mixture Formation in Fuel Sprays, 8th Periodic Report, IDEA (). Ignition delay times tted to indicated pressure (bottom - Ref. References [1] A. Burcat, C. Snyder, T. Brabbs, Ignition delay times of benzene and toluene with oxygen in argon mixtures, Tech.

Rep. TM, NASA (). [2] V. Vasudevan, on, R. Hanson, Shock tube measurements of toluene ignition times and OH. Ignition Processes in Hydrogen-Oxygen Mixtures U. MAAS and J. WARNATZ Physikalisch-Chemisches Institut der Universitiit Heidelberg, 1m Neuenheimer FeldHeidelberg, West Germany Ignition processes in the hydrogen-oxygen system were simulated by solving the corresponding conservation.

Shock Tube Study of Ignition Delay Characteristics of n -Nonane and n -Undecane in Argon 21 October | Energy & Fuels, Vol. 30, No. 11 Formulation of Surrogate Fuel Mixtures Based on Physical and Chemical Analysis of Hydrodepolymerized Cellulosic Diesel Fuel.the lowest auto-ignition temperature is not reached under the stoichiometric conditions, but for richer mixtures i.e.

between the stoichiometric concentration and the upper flammability limit [16]. Methane/air mixtures represent an exception to this rule: the lowest AIT of methane/air mixtures under 1 bar is.In this study, syngas combustion was investigated behind reflected shock waves in CO 2 bath gas to measure ignition delay times (IDT) and to probe the effects of CO 2 dilution.

New syngas data were taken between pressures of – atm and temperatures of – K.