RP-3航空煤油模拟替代燃料的着火延迟特性

Ignition Delay Characteristics of a Surrogate Fuel for RP-3 Kerosene

关键词:  RP-3航空煤油  模拟替代燃料  点火延迟时间  化学激波管  影响因素

Key words:  RP-3 kerosene  Surrogate fuel  Ignition delay time  Chemical shock tube  Influence factor

摘要:

为了获得一种新的国产RP-3航空煤油模拟替代燃料的着火延迟特性，在化学激波管中完成了初始压力分别为0.1MPa与0.3MPa，当量比分别为0.5，1.0与1.5，着火温度为1000~1700K条件下该模拟替代燃料着火延迟时间的试验测试，分析了初始压力与当量比对该模拟替代燃料着火延迟时间的影响规律，并与相应工况条件下RP-3航空煤油的着火延迟特性进行了对比分析。结果表明，不同工况条件下，该模拟替代燃料的着火延迟时间的对数与着火温度的倒数呈线性关系；其着火延迟时间随当量比的降低或着火温度、初始压力的升高逐渐缩短；相同工况条件下，该模拟替代燃料的着火延迟时间与RP-3航空煤油的着火延迟时间吻合较好。

Abstract:

In order to gain the ignition delay characteristics of a new surrogate fuel for RP-3 kerosene， the ignition delay times of this surrogate fuel at the initial pressures of 0.1MPa and 0.3MPa， equivalence ratios of 0.5， 1.0， 1.5， and the ignition temperature range of 1000K~1700K， were experimentally tested in a chemical shock tube. The effects of the initial pressure and equivalence ratio on the ignition delay time of this surrogate fuel were investigated and compared with the ignition delay characteristics of RP-3 kerosene under corresponding working conditions. The results show that the correlation for the logarithm of the ignition delay time of this surrogate fuel and the reciprocal ignition temperature is linear under different conditions. At the same time， with the equivalence ratio decreasing or the ignition temperature and initial pressure increasing， the ignition delay time of this surrogate fuel is shortened. Furthermore， the ignition delay time of this surrogate fuel is agreed well with that of RP-3 kerosene under the same conditions.