Measurement and Prediction of the Inert Gas Influence on Explosion Limits for Ethylene/Nitrogen/Air and Ethylene/Carbon-Dioxide/Air Mixtures at Elevated Pressures

Holtappels, Kai; Brinkmann, Christian; Dietlen, Siegmund; Schröder, V.; Stickling, J.; Schönbucher, Axel

doi:10.1002/1521-4125(200112)24:12<1263::aid-ceat1263>3.0.co;2-l

Cited by 3 publications

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“…An overview of these methods is presented in Figure 2. As demonstrated earlier, the laminar burning velocity depends on a series of factors such as the composition, initial temperature and pressure of the combustible gaseous mixture, the presence of inert or active additives, and the type of oxidant in which the combustion occurs [9,50,62].…”

Section: Laminar Burning Velocities Of H 2 -Enriched N-c 4 H 10 -Air ...mentioning

confidence: 90%

“…These differences can be observed even in the case of a mixture with the same composition that is studied using the same experimental technique (or the same vessel volume and shape) and under the same initial conditions. As demonstrated earlier, the laminar burning velocity depends on a series of factors such as the composition, initial temperature and pressure of the combustible gaseous mixture, the presence of inert or active additives, and the type of oxidant in which the combustion occurs [9,50,62].…”

Section: Effect Of the Mixture Equivalence Ratiomentioning

confidence: 90%

“…Therefore, new solutions to avoid these accidents are needed. In this sense, experimental and numerical investigations have been conducted on n-butane-air flames to determine their global combustion parameters, including ignition delay times [6][7][8], propagation parameters (peak explosion pressures, explosion times, maximum rates of pressure increase, and deflagration indexes) [9][10][11], as well as the laminar burning velocities [8,[12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

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The State of the Art of Laminar Burning Velocities of H2-Enriched n-C4H10–Air Mixtures

2023

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Currently, hydrogen-enriched n-butane blends present a real interest due to their potential to reduce emissions and increase the efficiency of combustion processes, as an alternative fuel for internal combustion engines. This paper summarises the recent research on laminar burning velocities of hydrogen-enriched n-C4H10–air mixtures. The laminar burning velocity is a significative parameter that characterises the combustion process of any fuel–air mixture. Accurately measured or computed laminar burning velocities have an important role in the design, testing, and performance of n-C4H10–H2 fuelled devices. With this perspective, a brief review on the influence of hydrogen amount, initial pressure and temperature, and equivalence ratio on the laminar burning velocity of hydrogen-enriched n-C4H10–air mixtures is presented. Hydrogen has a strong influence on the combustion of butane–air mixtures. It was observed that a parabola with a maximum at a value slightly higher than the stoichiometric ratio describes the variation in the laminar burning velocity of hydrogen-enriched n-butane–air mixtures with the equivalence ratio. An increase in initial pressure or hydrogen amount led to an increase in this important combustion parameter, while an increase in initial pressure led to a decrease in laminar burning velocity. Overall, these studies demonstrate that hydrogen addition to n-C4H10–air mixtures can increase the laminar burning velocity and flame temperature and improve flame stability. These findings could be useful for the optimisation of combustion processes, particularly in internal combustion engines and gas turbines. However, the literature shows a paucity of investigations on the laminar burning velocities of hydrogen-enriched n-C4H10–air mixtures at initial temperatures and pressures differing from those in ambient conditions. This suggests that experimental and theoretical investigations of these flames at sub-atmospheric and elevated pressures and temperatures are necessary.

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Section: Laminar Burning Velocities Of H 2 -Enriched N-c 4 H 10 -Air ...mentioning

confidence: 90%

Section: Effect Of the Mixture Equivalence Ratiomentioning

confidence: 90%