A method to determine ignition delay times for Diesel surrogate fuels from combustion in a constant volume bomb: Inverse Livengood-Wu method

作者：Reyes M^*; Tinaut F V; Andres C; Perez A

来源：Fuel, 2012, 102: 289-298.

DOI：10.1016/j.fuel.2012.07.041

• Auto-ignition time
• Ignition delay
• Diesel surrogate
• Chemiluminescence
• Livengood-Wu method

In this work a method to determine the ignition delay of Diesel surrogate fuels using data from a constant volume combustion bomb is presented. The studied fuels are n-heptane (a common PRF) and a mixture of 50% of n-heptane and 50% of toluene (in mass) because both fuels have been proposed as Diesel fuel surrogates under HCCI. There are different concepts of spontaneous ignition times in engines or other devices. Auto-ignition times are experimentally obtained in a constant volume combustion bomb or in compression ignition engines, for variable conditions of pressure and temperature. In this work they are obtained in a combustion bomb using four different criteria (pressure, mechanical vibrations, OH* and CH* chemiluminescence emissions). The paper describes an original approach based on an inverse Livengood-Wu method to obtain the ignition delays (as a function of pressure and temperature) from the auto-ignition times. The obtained expressions for the fuels and their mixtures are compared with those of other authors with a reasonable agreement.

• 出版日期2012-12