Results 251 to 260 of about 11,383 (301)
Ignition-delay times in laser initiated combustion
Applied Optics, 1981 A single pulse from a TEA CO(2) laser is used to heat 1:7:14 mixtures of SF(6):CH(4):O(2) to temperatures near 1000 K. A short- or long-duration pulse (one-half the energy deposited in 0.25 or 0.82 microsec, respectively) from a second TEA CO(2) laser is used to ignite the mixture. At comparable values of absorbed energy from the second laser, ignition-
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Ignition delay in diffusive supersonic combustion
3rd Propulsion Joint Specialist Conference, 1967This paper deals with the study of the zone located near the injector exit of an idealized supersonic combustion burner using hydrogen as fuel. The ignition delay length is calculated considering a constant-pressure, free mixing layer, where fuel and oxidizer mix without appreciable concentration change or heat release resulting from chemical reactions,
I. DA-RIVA, J. L. URRUTIA
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Ignition Delay in Diesel Engines
SAE Technical Paper Series, 1967<div class="htmlview paragraph">The ignition delay in diesel combustion has been studied in a turbulent chamber engine. The criteria used to define the end of this period are the pressure rise and illumination due to combustion. The pressure rise delay is generally shorter and more reproducible than the illumination delay.
N. A. Henein, Jay A. Bolt
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Low-Temperature Hypergolic Ignition of 1-Octene with Low Ignition Delay Time
The Journal of Physical Chemistry A, 2020The attainment of the efficient ignition of traditional liquid hydrocarbons of scramjet combustors at low flight Mach numbers is a challenging task. In this study, a novel chemical strategy to improve the reliable ignition and efficient combustion of hydrocarbon fuels was proposed.
Haoqiang Sheng +4 more
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Experimental Investigation on the Ignition Delay Time of Plasma-Assisted Ignition
International Journal of Turbo & Jet-Engines, 2016AbstractThis paper investigates the ignition performances of plasma-assisted ignition in propane/air mixture. The results show that a shorter ignition delay time is obtained for the plasma ignition than the spark ignition and the average ignition delay time of plasma-assisted ignition can be reduced at least by 50%.
Yang Xiao +4 more
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Ignition Delay in a Diesel Engine
2009The ignition delay in a diesel engine is defined as the time interval between the start of injection and the start of combustion. This delay period consists of (a) physical delay, wherein atomisation, vaporization and mixing of air fuel occur and (b) of chemical delay attributed to pre-combustion reactions.
P. A. Lakshminarayanan, Yogesh V. Aghav
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Transactions of the American Institute of Electrical Engineers, 1951
IMPROPER PERFORMANCE of gun-type oil burners operating with from 5 to 15 gallons of oil per hour led to an investigation that pointed to ignition delay as the cause of malfunctioning. The delay referred to is the time interval occurring between application of voltage to the ignition transformer primary and the initiation of the spark discharge in the ...
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IMPROPER PERFORMANCE of gun-type oil burners operating with from 5 to 15 gallons of oil per hour led to an investigation that pointed to ignition delay as the cause of malfunctioning. The delay referred to is the time interval occurring between application of voltage to the ignition transformer primary and the initiation of the spark discharge in the ...
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A MEMS glass membrane igniter for improved ignition delay and reproducibility
Sensors and Actuators A: Physical, 2017Abstract A MEMS igniter with improved ignition characteristics and reproducibility is described. A glass wafer was selected as the igniter material for high membrane structural stability. To improve the reproducibility of the igniter, the membrane was designed to realize a flat surface and uniform thickness, which are essential factors for ...
Daeban Seo +3 more
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Ignition delay in multifuel mixtures
Combustion, Explosion, and Shock Waves, 2007Methods used to calculate the ignition delay (induction time) of combustible systems consisting of several individual fuels are discussed. A modification of the Arrhenius equation for multifuel mixtures is proposed, which improves the agreement between numerical and experimental data. The method proposed is analyzed by an example of two-fuel systems on
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Ignition delay characteristics of methane fuels
Progress in Energy and Combustion Science, 1994Abstract A comprehensive literature search and a series of shock-tube experiments were undertaken to determine the ignition delay times for mixtures of methane with ethane, propane or butane, and for a typical natural gas fuel. Ignition delay experiments were conducted at equivalence ratios of 0.45–1.25 for temperatures 1300–2000 K and pressures 3–15
L.J. Spadaccini, M.B. Colket
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