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Showing 1 to 18 of 18 for “"Constant-Volume-Combustion"”.
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Development of a constant-volume combustion apparatus for fuels research
… rapid compression machines and continuous flow combustion chambers, the decision was made to develop a constant volume combustion chamber (CVCC). This option provided the greatest potential for optical access. The development of the high pressure and temperature environment was to be achieved …
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Mass Rate of Combustion and Pressure Development in a Constant Volume Combustion Chamber
Made available in DSpace on 2014-12-05T19:15:52Z (GMT). No. of bitstreams: 1 0018167.pdf: 5012489 bytes, checksum: 6bf3b763cc66715220f8938a4767a1a2 (MD5) Previous issue date: 1956
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Investigation of Clean Diesel Combustion With Oxygenated Fuels in a Constant -Volume Combustion Chamber Using Forward Illumination Light Extinction Technique
… soot reduction performances at different diesel combustion modes. In the premixed combustion mode, the higher oxygen efficiency from TPME due to its molecular structure advantage contributes to the less soot generation. While at mixing controlled combustion mode, DBM oxygenated fuel has less soot …
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Investigation of Pulse Detonation Engines: the Effect of Variable Blockage Ratio on the Deflagration to Detonation Transition
<p>Detonation and constant volume combustion is well known to be thermodynamically more efficient than the typically utilized constant pressure. There have been numerous approaches of achieving detonation through deflagration-to-detonation transition most of which use evenly spaced obstacles with a …
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Investigation of Pulse Detonation Engines; Theory, Design and Analysis
<p>Detonation and constant volume combustion has been known to the scientific community for some time but only recently has active research been done into its applications. Detonation based engines have received much attention in the last two decades because of its simple design and potential …
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Experimental investigation on traversing hot jet ignition of lean hydrocarbon-air mixtures in a constant volume combustor
A constant-volume combustor is used to investigate the ignition initiated by a traversing jet of reactive hot gas, in support of combustion engine applications that include novel wave-rotor constant-volume combustion gas turbines and pre-chamber IC engines. The hot-jet ignition constant-volume …
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Modelling spherical flame propagation in a closed volume
The highly exothermic reaction of fuel combustion is the most common source of usable energy in the world. The fuel itself originates almost entirely from fossil fuels, such as crude oil and natural gas. The use of these fuels for energy production is under pressure in recent times due to …
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Laminar flame propagation in a stratified charge
… were separated by a soap bubble in a spherical constant volume combustion vessel. The richer mixture inside the bubble was ignited by a focused laser beam. The flame development was observed by Schlieren technique and flame speeds were measured by heat release analysis of the pressure data. An …
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A Five-Zone Model for Direct Injection Diesel Combustion
… including compression, fuel injection and combustion, and expansion processes. Empirical relationships were used to create a new mixing-limited zero-dimensional model of the diesel combustion process. During fuel injection five zones were created to model the reacting fuel jet: 1) liquid …
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Coupling of Chemical Kinetics with Computational Fluid Dynamics in a Three-Dimensional Engine Model
… simplified global reaction steps to simulate the combustion and pollutant formation inside the internal combustion engine. With the current interest in advanced combustion modes and injection strategies, this approach depends on arbitrary adjustment of model parameters that could reduce …
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Novel Ignition Approaches for Improved Hydrogen Ignition
… with varying dwell times. Experiments utilized a constant-volume combustion chamber (CVCC) with optical access, replicating compression-ignition engine conditions. Baseline environment: 23.8kg/m³ gas density, 21vol.% O₂, 1000K core temperature. Analysis methods: high-speed schlieren imaging, …
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Analysis of diffusion models in high speed reacting flow simulations
… of the simulation results. The High Speed Combustion and Detonation (HSCD) code was used to simulate a two dimensional reflected shock flow field in a reactive H2-O2 mixture. The goal was to evaluate the effect of diffusion on the flow field. The HSCD code was first validated with Cantera …
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Modification of an ignition quality tester and its use in characterizing middle distillate fuels
The Ignition Quality Tester ( IQTTM ) is a constant volume combustion chamber based device which is used to determine the derived cetane number of diesel fuel oils when used in conjunction with ASTM D6890. During a test, the fuel sample is injected into heated, pressurised gas where it combusts. …
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Effects of Fuel Molecular Structure and Composition on Soot Formation in Direct-Injection Spray Flames
… base fuel to produce a non-sooting flame in a constant volume combustion vessel at 1000 K, and a density of 16.6 kg/m3. A second fuel was then added incrementally to determine an incipient soot limit. Line-of-sight extinction measurements were used as the primary diagnostic tool to determine if …
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Combustion characteristics of synthetic gasoline in modern charge boosted GDI Engines
… followed by laminar ame speed experiments in a constant-volume combustion bomb apparatus in order to characterise the combustion behaviour of the blending components according to their characteristic chemical properties. A matrix of test fuels was established by splash blending the synthetic …
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Dynamics of nanoparticle combustion
… shock tube was used to ignite and measure the combustion behavior of the nano-aluminum suspension behind reflected shock waves. The burning time and particle temperatures were measured using optical diagnostics. In order to use pyrometry measurements for nano-aluminum particles, the emissivity …
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Advanced Ignition Strategies for Future Internal Combustion Engines with Lean and Diluted Fuel-Air Mixtures
… conditions for applications in future internal combustion engines. Various spark ignition strategies were deployed by controlling the spark discharge process via different spark ignition hardware configurations. Modulated spark discharge parameters, such as enhanced discharge power, prolonged …
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Traversing hot jet ignition delay of hydrocarbon blends in a constant volume combustor
… issued from a pre-chamber to a relatively long combustion chamber is experimentally investigated. The long combustion chamber represents a single channel of a wave rotor constant-volume combustor. The issued jet ignites the fuel-air mixture in the combustion chamber. Fuel-air mixtures are …