A liquid fuel laminar diffusion flame burner for soot studies at high pressures

多年来，人们对烟尘的形成机理进行了广泛的研究，但仅建立了大气火焰中烟尘形成过程的非常广泛的特征。希望减少或消除来自燃烧源的碳烟颗粒排放，显然需要更好地了解其在燃烧过程中的形成和氧化。尽管在高压下运行的燃烧装置中有很大一部分使用液体燃料，但关于液体燃料在高于大气压力的层流扩散火焰中的积灰行为，目前还没有报道。文献中报道的高压烟尘研究仅限于对气态燃料(甲烷、乙烯、乙烷和丙烷)火焰的测量。气态燃料在非常有限的程度上模拟了液体燃料的行为，并且由于气态燃料的简单化学结构，不能捕捉例如分支和循环结构对烟尘倾向的影响。形成碳烟的液态碳氢燃料火焰的压力依赖性也可能对液体燃料的化学结构敏感。所要求的燃烧器系统将使在受控条件下进行高保真测量成为可能，以调查压力和燃料化学结构对液体碳氢燃料形成碳烟倾向的影响。

The mechanisms of soot formation have been investigated extensively over many years and only very broad features of the formation processes in atmospheric flames have been established. The hope of reducing or eliminating soot particulate emission from combustion sources clearly requires a better understanding of its formation and oxidation during the combustion process. Although, a significant portion of combustion devices that operate at high pressures use liquid fuels, there is no reported measurements on sooting behaviour of liquid fuels in laminar diffusion flames at pressures higher than atmospheric. High pressure soot studies reported in literature are limited to measurements on gaseous fuels (methane, ethylene, ethane, and propane) flames. Gaseous fuels mimic the behaviour of the liquid fuels to a very limited extent, and cannot capture the influences of, for example, branching and cyclic structures on sooting propensities due to the simple chemical structure of gaseous fuels. It is also possible that the pressure dependence of soot formation liquid hydrocarbon fuel flames could be sensitive to the chemical structure of the liquid fuel.  Requested burner system would make it possible to make high-fidelity measurements under controlled conditions to investigate the influence of pressure and fuel chemical structure on soot formation propensity of liquid hydrocarbon fuels.