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The effect of diluent on flame structure and laminar burning speeds of JP-8/oxidizer/diluent premixed flames

机译：稀释剂对JP-8 /氧化剂/稀释剂预混火焰的火焰结构和层流燃烧速度的影响

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Experimental studies have been performed to investigate the flame structure and laminar burning speed of JP-8/oxidizer/diluent premixed flames at high temperatures and pressures. Three different diluents including argon, helium, and a mixture of 14% CO_2 and 86% N_2 (extra diluent gases), were used. The experiments were carried out in two constant volume spherical and cylindrical vessels. Laminar burning speeds were measured using a thermodynamics model based on the pressure rise method. Temperatures from 493 to 700 K and pressures from 1 to 11.5 atm were investigated. Extra diluent gases (EDG) decrease the laminar burning speeds but do not greatly impact the stability of the flame compared to JP-8/air. Replacing nitrogen in the air with argon and helium increases the range of temperature and pressure in the experiments. Helium as a diluent also increases the temperature and pressure range of stable flame as well as the laminar burning speed. Power law correlations have been developed for laminar burning speeds of JP-8/air/EDG and JP-8/oxygen/helium mixtures at a temperature range of 493-700 K and a pressure range of 1-10 atm for lean mixtures.
机译：已经进行了实验研究，以研究高温高压下JP-8 /氧化剂/稀释剂预混火焰的火焰结构和层流燃烧速度。使用了三种不同的稀释剂，包括氩气，氦气以及14％CO_2和86％N_2（额外的稀释气体）的混合物。实验在两个恒定体积的球形和圆柱形容器中进行。使用基于压力升高方法的热力学模型测量层流燃烧速度。研究了493至700 K的温度和1至11.5 atm的压力。与JP-8 /空气相比，额外的稀释气体（EDG）会降低层流燃烧速度，但不会极大地影响火焰的稳定性。在实验中，用氩气和氦气代替空气中的氮气会增加温度和压力范围。氦作为稀释剂还会增加稳定火焰的温度和压力范围以及层流燃烧速度。已经开发出幂律相关性，以用于JP-8 /空气/ EDG和JP-8 /氧气/氦气混合物的层流燃烧速度，温度范围为493-700 K，稀薄混合物的压力范围为1-10 atm。

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