Plasma-assisted ignition for a kerosene fueled scramjet at Mach 1.8

Li, Fēi; Yu, Xilong; Tong, Yinggang; Shen, Yan; Chen, Jian; Chen, Lihong; Chang, Xinyu

doi:10.1016/j.ast.2012.10.005

Cited by 50 publications

(12 citation statements)

References 28 publications

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“…Among these, the "chemical effect" mainly means that the high-temperature arc formed by the plasma igniter ionizes the working medium gas flowing through the inner cavity of the igniter and generates a plasma containing a large amount of active particles to reduce the activation energy of the chemical reaction, enhance the rate of chemical reaction, and accelerate the progress of the chemical reaction. e "chemical effect" mainly depends on the type of active particles in the plasma jet, which depends, in turn, on the type of gas in the working medium and the discharge parameters [13].…”

Section: Introductionmentioning

confidence: 99%

Effects of Working Medium Gases on Emission Spectral and Temperature Characteristics of a Plasma Igniter

Chen

Bing

et al. 2019

Journal of Spectroscopy

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Ar, N2, O2, and N2-O2 mixture under different O2 components were separately used as the working medium gas of a plasma igniter to study the influence of working-medium-gas type and O2 concentration on emission spectral and temperature characteristics of a direct-current arc plasma igniter. The emission spectra of the plasma jet were also analyzed using the optical emission spectroscopy method, and the influence rule of working medium gas and O2 concentration on electron temperature and vibrational temperature of the plasma jet was calculated and analyzed. The experimental results show that the emission spectra of the plasma jet had significant differences when diverse working gases were used as the working medium of the igniter. With increasing O2 concentration in the working medium gas, the spectral line intensity of oxygen-containing particles in emission spectra of the plasma jet was significantly enhanced, and the spectral intensities of nitrogen-containing particles, NO molecular bands, the second positive system of N2C3∏u−B3∏g, and the first negative system of N2+B2∑u+−X2∑u+ were also enhanced obviously. Both electron and vibrational temperature of the plasma jet increased gradually with increasing O2 concentration in the working medium gas, and first increased and then decreased with increasing axial distance from the plasma jet.

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Section: Introductionmentioning

confidence: 99%

Effects of Working Medium Gases on Emission Spectral and Temperature Characteristics of a Plasma Igniter

Chen

Bing

et al. 2019

Journal of Spectroscopy

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“…Based on spark discharge, researchers have proposed a variety of multichannel spark ignition methods [6][7][8], which can increase ignition energy but result in the increased complexity and reduced reliability of the ignition system. Compared with the surface spark discharge ignition, the plasma jet ignition has a significant advantage in improving the spark penetration depth of the initial spark kernel [9][10][11]. However, the plasma jet igniter is based on the external gas source, which increases the complexity of the whole ignition system and becomes an obstacle to its application.…”

Section: Introductionmentioning

confidence: 99%

A Novel Way to Enhance the Spark Plasma-Assisted Ignition for an Aero-Engine Under Low Pressure

et al. 2018

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Finding a new ignition strategy for ignition enhancement in a lean-burn combustor has always been the biggest challenge for high-altitude, long-endurance unmanned aerial vehicles (UAVs). It is of great importance for the development of high-altitude, long-endurance aircraft to improve the secondary ignition ability of the aero-engine at high altitude where the ignition capability of the aero-engine igniter rapidly declines. An innovative ignition mode is therefore urgently needed. A novel plasma-assisted ignition method based on a multichannel discharge jet-enhanced spark (MDJS) was proposed in this study. Compared to the conventional spark igniter (SI), the arc discharge energy of the MDJS was increased by 13.6% at 0.12 bar and by 14.7% at 0.26 bar. Furthermore, the spark plasma penetration depth of the MDJS was increased by 49% and 103% at 0.12 bar and 0.26 bar, respectively. The CH* radicals showed that the MDJS obtained a larger initial spark kernel and reached a higher spark plasma penetration depth, which helped accelerate the burning velocity. Ignition tests in a model swirl combustor showed that the lean ignition limit was extended 24% from 0.034 to 0.026 at 25 m/s with 20 °C kerosene and 17% from 0.075 to 0.062 at 12 m/s with −30 °C kerosene maximally. The MDJS was a unique plasma-assisted ignition method, activated by the custom ignition power supply instead of a special power supply with an extra gas source. The objective of this study was to provide a novel multichannel discharge jet-enhanced spark ignition strategy which would help to increase the arc discharge energy, the spark plasma penetration depth and the activated area without changing the power supply system and to improve the safety and performance of aero-engines.

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“…В основном технологии плазменного поджига базируются на применении электрическо-го разряда высокой мощности для нагрева и ионизации смеси [Adamovich et al, 2009;Li et al, 2013]. Также определенных успехов удалось достичь при использовании микроволнового раз-ряда для воспламенения газообразного и жидкого топлива в скоростном потоке [Shibkov et al, 2009].…”

Section: Introductionunclassified

Numerical simulation of ethylene combustion in supersonic air flow

Firsov¹,

Yarantsev²,

Leonov³

et al. 2017

CRM

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В представленной работе обсуждается возможность упрощенного трехмерного нестационарного моделирования процесса плазменно-стимулированного горения газообразного топлива в сверхзвуковом потоке воздуха. Расчеты проводились в программном комплексе FlowVision. В работе выполнен анализ геометрии эксперимента и сделан вывод о ее существенной трехмерности, связанной как с дискретно-стью подачи топлива в поток, так и с наличием локализованных плазменных образований. Предложен вариант упрощения расчетной геометрии, основанный на симметрии аэродинамического канала и перио-дичности пространственных неоднородностей. Выполнено тестирование модифицированной k-ε модели турбулентности FlowVision (KEFV) в условиях сверхзвукового потока. В этих расчетах в области источ-ников тепла и инжекции топлива использовалась подробная сетка без пристеночных функций, а на уда-ленных от ключевой области поверхностях пристеночные функции были включены. Это позволило су-щественно уменьшить количество ячеек расчетной сетки. Сложная задача моделирования воспламенения углеводородного топлива при воздействии плазмы была существенно упрощена путем представления плазменных образований как источников тепла и использования одной брутто-реакции для описания горения топлива. На базе геометрии аэродинамического стенда ИАДТ-50 ОИВТ РАН с помощью моде-лирования в программном комплексе ПК FlowVision проведены калибровка и параметрическая оптими-зация подачи газообразного топлива в сверхзвуковой поток. Продемонстрировано хорошее совпадение экспериментальной и синтетической теневой картины потока при инжекции топлива. Проведено моде-лирование потока для геометрии камеры сгорания Т131 ЦАГИ с инжекцией топлива и генерацией плаз-мы. В результате моделирования для заданного набора параметров продемонстрировано воспламенение топлива, что совпало с результатами эксперимента. Отмечена важность адаптации расчетной сетки с по-вышением пространственного разрешения в области объемных источников тепла, моделирующих зону электрического разряда. Достигнуто удовлетворительное качественное совпадение распределений давле-ния, полученных в моделировании и эксперименте.Ключевые слова: горение в сверхзвуковом потоке, компьютерное моделирование, разряд постоян-ного тока, плазменно-стимулированное горение Работа выполнена при финансовой поддержке программы ЦАГИ-РАН.

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Plasma-assisted ignition for a kerosene fueled scramjet at Mach 1.8

Cited by 50 publications

References 28 publications

Effects of Working Medium Gases on Emission Spectral and Temperature Characteristics of a Plasma Igniter

Effects of Working Medium Gases on Emission Spectral and Temperature Characteristics of a Plasma Igniter

A Novel Way to Enhance the Spark Plasma-Assisted Ignition for an Aero-Engine Under Low Pressure

Numerical simulation of ethylene combustion in supersonic air flow

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