液体火箭发动机高频燃烧不稳定数值模拟基础模型  

Fundamental models for numerical simulation of high frequency combustion instability in liquid rocket engine

作　　者：洪春涛 陈钱 HONG Chuntao;CHEN Qian(School of Aeronautics and Astronautics,Sun Yat-sen University,Shenzhen 518107,China)

机构地区：[1]中山大学航空航天学院,广东深圳518107

出　　处：《火箭推进》2025年第1期17-33,共17页Journal of Rocket Propulsion

基　　金：广东省基础与应用基础研究基金(2024A1515010712)。

摘　　要：液体火箭发动机高频燃烧不稳定问题是液体火箭发动机中重要的复杂问题之一,数值模拟在研究该问题时具有一定优势。液体火箭发动机高频燃烧不稳定数值模拟涉及较多基础模型,为了合理应用现有基础模型并进行进一步发展,从喷雾模型与蒸发模型、湍流模型与亚格子模型、燃烧模型、热物性模型这4个方面对其相关研究进行梳理。结果表明,离散相模型尽管能获得较好效果,但离实现液体火箭发动机高频燃烧不稳定全过程解析所需的喷雾模拟还有较大差距,后续研究中需通过在数值模拟中更好地融入流动不稳定性理论来准确模拟喷雾过程自身的非定常特性,通过离散相模型的气液双向耦合或VOF-DPM模型来准确模拟喷雾过程对扰动的响应。湍流建模中尽管经济性高的URANS方法在工程设计上有一定的价值,但LES方法能更准确地捕捉非线性压力振荡对非定常湍流的影响,后续研究中RANS/LES混合方法也应得到进一步的应用。EBU-Arrhenius模型能初步满足湍流-化学反应相互作用建模的要求,但燃烧细节的模拟不足;后续研究中可采用考虑详细化学反应动力学机理的燃烧模型,以更准确地捕捉非线性压力振荡对非定常燃烧释热的影响。目前大多研究都考虑了真实流体热物性,后续研究中还需探索适用于亚临界、跨临界和超临界等环境下所有流体状态的热物性统一处理方法。High frequency combustion instability of liquid rocket engine is one of the important complex issues in liquid rocket engine and numerical simulation has a unique advantage to study this problem.The numerical simulation of high frequency combustion instability of liquid rocket engine involves many fundamental models.In order to apply the existing fundamental models reasonably and develop them further,a review of related research is neccessary.The review includes four aspects:spray model and evaporation model,turbulence model and subgrid model,combustion model and thermophysical property model.The results show that although the discrete phase model can achieve good results,there is still a big gap between the spray simulation required for the analysis of the whole process of high frequency combustion instability in liquid rocket engines.In the subsequent research,the unsteady characteristics of the spray process itself should be accurately simulated by better integrating the flow instability theory into the numerical simulation,and the response of the spray process to the disturbance should be accurately simulated by the gas-liquid bidirectional coupling of the discrete phase model or the VOF-DPM model.In turbulence modeling,although URANS method with high economy has certain application value in engineering design,LES method can more accurately capture the influence of nonlinear pressure oscillation on unsteady turbulence,and RANS/LES mixed method should also be further popularized and applied in subsequent research.The EBU-Arrhenius model can initially meet the modeling requirements of turbulence-chemical reaction interaction,but the simulation of combustion details is insufficient.Combustion model considering detailed chemical reaction kinetics can be used in subsequent studies to more accurately capture the effect of nonlinear pressure oscillations on heat release from unsteady combustion.At present,most studies have considered the thermophysical properties of real fluids.In the follow-up studies,it is necessa

关 键 词：液体火箭发动机 高频燃烧不稳定 喷雾模型 湍流模型 亚格子模型 燃烧模型 热物性模型 

分 类 号：V434.1[航空宇航科学与技术—航空宇航推进理论与工程]