Effects of ignition parameters on combustion process of a rotary engine fueled with natural gas
Effects of ignition parameters on combustion process of a rotary engine fueled with natural gas
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点火参数对天然气转子发动机燃烧过程的影响
DOI：
10.1016/j.enconman.2015.06.055
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发表时间：
2015-10
影响因子：
10.4
通讯作者：
Zhu Yuejin
中科院分区：
文献类型：
--
作者：
Fan Baowei;Pan Jianfeng;Liu Yangxian;Zhu Yuejin
以天然气为燃料的侧进气转子发动机是一种新型、清洁、高效的能源系统。本文对一台天然气侧进气转子发动机在不同点火位置和点火时刻下的性能、燃烧和排放特性进行了数值研究。使用多维软件ANSYS Fluent进行模拟。在此基础上，通过编写动网格程序和选择详细的反应机理，建立了三维动态模拟模型。基于化学反应动力学的三维动态模拟模型也得到了实验数据的验证。同时，进一步研究了点火运行参数与缸内流场的耦合作用对燃烧过程的影响。仿真结果表明，为提高燃烧效率，后置火花塞应位于滚流区后部，点火提前角应适当提前。这主要是由于尾部火花塞位于滚流区的后部，因为它不仅允许燃烧室后部的燃料无延迟地燃烧，而且还允许滚流加速火焰传播。同时，随着点火正时的提前，点火正时和滚流消失正时之间的时间增加，这导致用于提高燃烧率的滚流效应时间增加。然而，这种改进的燃烧的缺点是NO排放量略有增加。在计算条件下，当情况C的后火花塞方案与50 °CA（BTDC）的点火正时相结合时，与原发动机的火花塞位置和点火正时相比，其峰值压力增加了27.4%。在计算条件下，考虑到NO排放的有限增加，该点火分配方案是最佳的。该研究为确定不同工况下的最佳点火位置和点火时刻提供了理论依据。
The side-ported rotary engine fueled with natural gas is a new, clean, efficient energy system. This work aims to numerically study the performance, combustion and emission characteristics of a side-ported rotary engine fueled with natural gas under different ignition positions and ignition timings. Simulations were performed using multi-dimensional software ANASYS Fluent. On the basis of the software, a three-dimensional dynamic simulation model was established by writing dynamic mesh programs and choosing a detailed reaction mechanism. The three-dimensional dynamic simulation model, based on the chemical reaction kinetics, was also validated by the experimental data. Meanwhile, further simulations were then conducted to investigate how to impact the combustion process by the coupling function between ignition operating parameter and the flow field inside the cylinder. Simulation results showed that in order to improve the combustion efficiency, the trailing spark plug should be located at the rear of the tumble zone and the ignition timing should be advanced properly. This was mainly caused by the trailing spark plug being located at the rear of the tumble zone, as it not only allowed the fuel in the rear of combustion chamber to be burnt without delay, but also permitted the acceleration of the flame propagation by the tumble. Meanwhile, with advanced ignition timing, the time between ignition timing and the timing of the tumble disappearance increased, which led to an increase of the tumble effect time used to improve the combustion rate. However, the drawback of this improved combustion was the slight increase in NO emissions. Under the computational condition, when the trailing spark plug scheme of case C coupled with an ignition timing of 50 °CA (BTDC) was compared with the spark plug location and the ignition timing of the original engine, it showed a 27.4% increase in the peak pressure. Taking the limited increase of NO exhaust into consideration it was the best ignition allocation scheme under the computational condition. This study provided a theoretical foundation for the determination of best ignition position and ignition timing under different working conditions.
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影响因子：
4.4
作者：
Bin Yang;S. Pope
通讯作者：
Bin Yang;S. Pope
DOI：
10.1016/j.proci.2006.08.088
发表时间：
2007
期刊：
--
影响因子：
--
作者：
N. Kawahara;E. Tomita;Kenta Hayashi;M. Tabata;Kouhei Iwai;Ryoji Kagawa
通讯作者：
N. Kawahara;E. Tomita;Kenta Hayashi;M. Tabata;Kouhei Iwai;Ryoji Kagawa
DOI：
10.4271/841017
发表时间：
1984-08
期刊：
SAE transactions
影响因子：
--
作者：
T. Muroki
通讯作者：
T. Muroki
影响因子：
10.4
作者：
İsmail Altın;Atilla Bilgin
通讯作者：
İsmail Altın;Atilla Bilgin
影响因子：
10.4
作者：
J. Arroyo;F. Moreno;M. Muñoz;C. Monné
通讯作者：
J. Arroyo;F. Moreno;M. Muñoz;C. Monné