Aircraft emissions contribute to global climate change and regional air pollution near airports. Understanding the formation and the transformation of emissions in the aircraft engine is essential to properly quantify the environmental impact and air pollution. However, precise investigation of chemical process in the turbine is challenging because of the complexity of the transformation process in the complex flow relating to the moving blade at high temperature and high pressure. We present here, the first published model study of 3D chemical formations inside a high-pressure turbine and first time to compare three numerical solutions (1D, 2D and 3D calculations) of transformation of trace species inside an aircraft engine. The model has simulated the evolution of principal precursor pollutant gases (NO_x and SO_x) and other species (hydrogen, oxygen species and carbon oxides). Our results also indicated strong dissimilarities in chemical transformations of 3D calculations. In comparing the three solutions, the results obtained showed that the difference of mole fractions of species can be under predicted by 75% between 1D and 2D calculations and in the comparison of 2D and 3D calculation, the under predicted difference may be 90%.

飞机排放物导致全球气候变化和机场附近的区域空气污染。了解飞机发动机排放物的形成和转变对于正确量化环境影响和空气污染至关重要。但是，由于高温和高压下与动叶片相关的复杂流动中的转换过程非常复杂，因此涡轮机中化学过程的精确研究具有挑战性。我们在这里展示的是首次发表的关于高压涡轮机内部3D化学形成的模型研究，并且是首次比较飞机发动机内部微量物质转化的三种数值解法（1D，2D和3D计算）。该模型模拟了主要前体污染物气体（NO _x和SO _x）以及其他物质（氢，氧和碳氧化物）。我们的结果还表明，在3D计算的化学转换中存在很大的差异。在比较这三种溶液时，获得的结果表明，在一维和二维计算之间，物种的摩尔分数差异可以低估75％；而在2D和3D计算的比较中，低估差异可能为90％。