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Showing 1 to 20 of 24 for “"Rapid Compression Machine"”.
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Ignition study in rapid compression machine
… governs auto-ignition in spark-ignition (SI), compression-ignition (CI) and homogeneous charge compression-ignition (HCCI) engines. In this study, we measured ignition delay on the Rapid Compression Machine (RCM). RCM is a single-stroke device, which compresses uniform mixtures to engine-like …
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Autoignition measurements and modeling in a rapid compression machine
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Autoignition measurements for oxygenated fuels in a rapid compression machine
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1993.
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Rapid compression machine measurements of ignition delays for primary reference fuels
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1990.
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A study of diesel heat transfer distribution using a rapid compression machine
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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Ignition delay study of next generation alternative jet fuels in a rapid compression machine
… measuring the pressure trace of autoignition in rapid compression machine, ignition delay time is captured through the pressure derivative. Category A fuels represent conventional jet fuels. Three of the category A fuels of interest are Jet A(Jet A-2), the nominal commercial aviation fuel, …
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Data base generation and modeling of Homogeneous Charge Compression Ignition using a rapid compression machine
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.
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Study of lubrication oil ignition in a rapid compression machine under sporadic pre-ignition conditions
… The pre-ignition would produce extreme knock. A rapid compression machine (RCM) was used to simulate this scenario and determine if oil vapor can cause SPI, and if so, to relate the auto-ignition tendency to the oil properties. The RCM was used to measure the ignition delay of a cloud of oil …
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Autoignition and flame speed of premixed liquefied petroleum gas in a rapid compression machine: experimental results and reduced chemical kinetic mechanism
… in international markets. In this study, a rapid compression machine (RCM) was used to characterize the effects of variation in LPG fuel reactivity, equivalence ratio, and exhaust gas recirculation (EGR) on the autoignition and flame speeds of LPG/oxidizer/inert/EGR blends. Experiments were …
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Soot formation in direct injection spark ignition engines under cold-idle operating conditions
… injection spark ignition engines are growing rapidly in popularity, largely due to the fuel efficiency improvements in the turbo-downsized engine configuration that are enabled by direct injection technology. Unfortunately, direct injection spark ignition engines also emit higher …
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Effect Of Cetane Number And Volatility On Autoignition And Combustion Of Alternative Fuels And Their Surrogates
… combustion, performance, and emissions under compression ignition conditions to evaluate the operational capability of diesel engines fueled with alternative fuels.</p> <p>This dissertation covers a detailed investigation of the autoignition, combustion, and emission characteristics of …
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Detailed Kinetic Modelling of the Oxidation and Combustion of Large Hydrocarbons Using an Automatic Generation of Mechanisms
… simulation of auto-ignition of n-pentane in a rapid-compression machine shows good agreement with experimental results. Experimentally derived and numerically predicted ignition delays of n-heptane/air and n-decane/air mixtures in high-pressure shock tubes in a wide range of temperatures, …
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Efficient development and uncertainty propagation of aviation fuel chemical kinetic models
… presents a comprehensive methodology for the rapid development of reduced chemical kinetic mechanisms for jet fuels, with a focus on sustainable aviation fuels (SAFs). The framework is designed to balance model accuracy, computational efficiency, and experimental requirements for quick …
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Experimental and computational study of soot formation under diesel engine conditions
… charge composition and thermal state, a new rapid compression machine (RCM) was built to study the phenomenon. The RCM provides a well-controlled and uniform engine-like thermal environment, where mixing and chemistry are decoupled. Fuel-rich mixtures of n-butane and air were primarily used …
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The effect of fuel injection pressure and in cylinder temperature on igniton delay, combustion performance and emission
… release process during ignition delay periods. Rapid compression machine (RCM) was used to simulate actual phenomenon inside the combustion chamber. This study used of 5vol%, 10vol%, and 15vol% blending of palm oil methyl ester with a standard diesel as fuels in diesel engines called as B5, B10, …
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An approach of compartmentalisation in development of non-isothermal chemical reactor network models for the high speed simulation of iso-octane combustion
… kinetic model was also further validated using Rapid Compression Machine data. The current study also modified the methodology for developing a CRN in order to make the CRN more predictive as compared to previous studies. This was achieved by incorporating non-isothermal sub-models into the …
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On fuel selection in controlled auto-ignition engines : the link between intake conditions, chemical kinetics, and stratification
… can have on the high-load limit in a stratified Compression Auto-Ignition (CAI) engine. This was accomplished by first studying the validity of the current metrics that predict when the high-load limit is reached. Temperature and fuel concentration stratification, and the degree that they can be …
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Surrogate modeling of alternative jet fuels for study of autoignition characteristics
… compared with published data from experimental rapid compression machine (RCM) tests for conventional jet fuel. Evaluation of these surrogate models aids in identifying differences in chemical kinetics mechanisms, helping to establish model validity across operating conditions of interest. This …
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Knock mitigation on boosted Controlled Auto-Ignition engines with fuel stratification and Exhaust Gas Recycling
… engines. Experiments were first conducted on Rapid Compression Machine (RCM) to profile the ignition characteristic of the specific fuel used, and to explain the dilution effects of air and inert gas. Then the effect of fuel stratification and EGR were systematically examined on a production …
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Autoignition study of next generation aviation fuels and components
… specific conditions are further evaluated with rapid compression machine (RCM) experimental results and CHEMKIN chemical mechanism simulations. A newly constructed shock tube is also utilized to extend experimental temperature conditions to the negative temperature coefficient (NTC) regime and …
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