Sensitivity of dual fuel engine combustion and knocking limits to gaseous fuel composition
Sensitivity of dual fuel engine combustion and knocking limits to gaseous fuel composition
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DOI：
10.1016/s0196-8904(03)00150-x
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发表时间：
2004-02
影响因子：
10.4
通讯作者：
M. Selim
中科院分区：
文献类型：
--
作者：
M. Selim
分别测量并呈现使用柴油和三种气体燃料两种燃料运行的双燃料发动机的燃烧噪声、爆震和点火极限数据。使用的气体燃料是液化石油气、纯甲烷和压缩天然气混合物。燃烧期间的最大压力上升率表示为燃烧噪声的量度，爆震和点火极限表示为爆震和点火故障开始时的扭矩输出。对双燃料发动机的实验研究揭示了不同设计和操作条件下所有气体的燃烧、爆震和点火极限所产生的噪声。里卡多 E6 柴油版发动机经过改装，可使用柴油和经过测试的气体燃料双燃料运行，并在整个工作过程中使用。发动机完全计算机化，气缸压力数据、曲轴转角数据和发动机工作变量都存储在PC中以供离线分析。对于使用三种气体燃料运行的双发动机，分别研究了发动机转速、负载、引燃喷射角、引燃燃料量和压缩比对燃烧噪声、爆震扭矩、热效率和最大压力的影响。研究发现，燃烧噪声、爆震和点火极限与气体燃料的类型以及发动机的设计和运行参数有关。
Combustion noise, knock and ignition limits data are measured and presented for a dual fuel engine running on dual fuels of Diesel and three gaseous fuels separately. The gaseous fuels used are liquefied petroleum gas, pure methane and compressed natural gas mixture. The maximum pressure rise rate during combustion is presented as a measure of combustion noise, and the knocking and ignition limits are presented as torque output at the onset of knocking and ignition failure. Experimental investigation on the dual fuel engine revealed the noise generated from combustion, knocking and ignition limits for all gases at different design and operating conditions. A Ricardo E6 Diesel version engine is converted to run on dual fuel of Diesel and the tested gaseous fuel and is used throughout the work. The engine is fully computerized, and the cylinder pressure data, crank angle data and engine operating variables are stored in a PC for off line analysis. The effects of engine speeds, loads, pilot injection angle, pilot fuel quantity and compression ratio on combustion noise, knocking torque, thermal efficiency and maximum pressure are examined for the dual engine running on the three gaseous fuels separately. The combustion noise, knocking and ignition limits are found to relate to the type of gaseous fuels and to the engine design and operating parameters.