吸热型液体碳氢燃料在主动冷却通道内的高温热裂解结焦是目前高超音速发动机运行中存在的严重问题之一。项目在对液体燃料结焦途径全面分析的基础上，重点针对与流场耦合作用最强、机理复杂且不明确、抑制技术尚不成熟的非催化结焦过程，采用模型构建、数值模拟和实验验证多种研究手段，围绕结焦母体形态划分、沉积及附壁反应机制的模型化、积碳的多场耦合影响及其定量模拟、多场耦合计算方法的优化和建立等关键科学问题和内容，构建用于描述固相沉积、气相吸附、附壁反应等复杂行为的理论计算模型。同时，将构建的核心模型与目前通用的燃料裂解基元反应动力学、湍流流动等模型结合，建立可实现非催化积碳过程模拟和预测的数值分析平台，通过与模化实验结果的对比、验证和优化，对冷却通道内的非催化积碳影响机制及其与空间裂解反应场之间的耦合作用进行准确的把握和分析，为发动机积碳防治技术的开发提供有效的指导。

Pyrolytic Coking of endothermic hydrocarbon fuels in the regenerative cooling channels is one of the serious problems during the running process of modern supersonic aircrafts. Based on the comprehensive analysis of coking ways of liquid hydrocarbon fuels, the researches in this project are focused on the non-catalytic coking process, which is strongly coupled with turbulent flow, with more complex mechanism and without effective inhibition technology at present. Using the research methods combining the theoretical analysis, numerical modeling and principle experiments, several key contents will be researched in this project, which includes: the morphological classification of coking precursor, modeling of deposition and wall surface reaction, simulation of multiple coupling effects on coking process and modification of coupling calculation method for multi-field. After that, the project will develop the numerical models of particle deposition, gas phase adsorption and wall surface reaction. Furthermore, the developed models will be implanted into the whole computation code combined with the detail pyrolytic reaction kinetics and turbulence model, and then the simulation and prediction platform of non-catalytic coking process will be built up. Based on the comparisons with the theoretical experiments and accuracy optimization for the developed models, the pyrolytic coking mechanism and its coupling function with the reaction flow field can be illuminated. The fundamental research results in this project are helpful to the development of pyrolytic coking inhibition technology in the regenerative cooling channels.