燃烧室性能数值模拟样例.docVIP

某型航空发动机燃烧室性能数值模拟 摘 要 关键词：燃烧室；温度场；；； Abstract This article is aimed at studying certain aero-engine, this type of combustion chamber is annular, in order to obtain satisfactory simulation results, considering calculation capacity of the computer, we have intercepted flame canister fan-shaped section with three heads as a computation model. We have used Gambit software to complete the combustion model, using Fluent software to simulate the peak load of this aero-engine combustion chamber flows and state, to conclude the flow field of combustion chamber typical section, the temperature field .Then the obtained results are analyzed. Analysis shows that the calculation results are acute, it also shows that the highest temperature of flame is in the axial position of the primary holes, the flame temperature on the primary holes began to fall after the highest temperature near the combustion chamber, in the field of outlet temperature, the highest temperature of export section is 1820K, the average temperature is 1342K, the distribution of the temperature is overall even. The average speed of combustion chamber exports is 128.99 m/s, these values match the annular combustion chamber combustion characteristics, it is visible that in some extent numerical simulation could actual response in the combustor liner airflow structure and burning process. These results provide valuable reference basis and data for the design, improvement, development and improvement of the combustion chamber in the future. Keywords: combustor; Numerical simulation; Velocity field; Temperature field 目 录 绪论 1 引言 1 1.2 航空发动机燃烧室的工作情况 2 1.3 燃烧室的研究方法 3 1.4 燃烧室数值模拟的现状和发展 4 1.5 数值分析在燃烧室模拟中的应用 5 1.6 本课题研究对象及内容 6 2 燃烧室数值模拟的数学模型及其数值解法 7 2.1 基本数学物理模型 7 2.1.1 基本控制方程 7 2.1.2 湍流模型 9 2.1.3 燃烧模型 9 2.1.4 辐射模型 13 2.1.5 微分方程组的通用形式 13 2.2 数值计算方法 14 2.2.1 三维气相燃烧流场的离散方程 14 2.2.2 离散化方程的求解 16 3 软件选择与模型建立 18 3.1 软件的选择 18 3.1.1 FLUENT软件 18 3.1.2 GAMBIT软件 18 3.2 燃烧模型的建立及网格划分 19 3.3 边界条件 20 4 模拟结