某型发动机喷油环流量仿真实验研究及其测试系统的设计与实现

【作者】 王飞；

【导师】 雷勇；

【作者基本信息】 西北工业大学 ， 信号与信息处理， 2007， 硕士

【摘要】 喷油系统是航空发动机燃烧室的关键组成部分之一，包括喷油环及喷嘴等核心部件，各部件的性能直接关系到燃烧室的性能。 本文前半部分在吸取国内外相关研究经验的基础上，采用数值模拟的方法对某型发动机喷油环内流场流量特性进行了初步分析：首先建立了喷油环内部流场计算模型，并针对所研究喷油环的结构特点和实际测试数据确定了合理的边界条件；然后分别采用了两种不同湍流模型——标准κ—ε模型和RNG κ—ε模型，对喷油环整环三维流场进行数值模拟计算，通过比较分析两种计算结果的差异，得出结论：在喷油环内流场数值模拟中，在对湍流模型的选择上，RNG κ—ε模型要优于标准κ—ε模型；最后又根据计算结果对环上单个喷嘴内部的流场特性及喷油环出口流量分布情况进行了分析，并与实际结果进行比较，分析了差异产生的原因。 后半部分对某型喷油环流量特性测试系统进行了详细设计：详细阐述了喷油环流量特性测试系统软件部分的开发流程，遵循软件工程的思想，将应用软件划分为若干功能模块，结合实际试验需要，分析了应用软件的各项需求，详细阐述了各功能模块的实现以及技术要点，展示了开发后的效果。更多还原

【Abstract】 The spraying system, including core components such as nozzle and nozzle-loop etc., is one of the most important components in aeroengine combustor, each component has immediate impact on the combustor’s performance.The fore part of this paper has simulated the interior 3-D flow field of nozzle-loop by numerical simulation method: First, the calculated model of the flow field is builded, and a logical boundary condition is confirmed according to its structure characteristic and actual test data. Then two different overfall models— standard k-e model & RNG k-ε model—are adopted to simulate the interior 3-D flow field, and conclusion that RNG k-ε model is better than standard k-ε model when simulating the interior 3-D flow field of nozzle-loop is educed by comparing and analyzing the difference between the two calculated result. At last, single nozzle’s interior flow trait and the flux distributing trait of nozzle-loop’s outflow flux are analysed.The second part has detailedly designed the flux trait testing system of the nozzle-loop: introduces the development flow of the testing system detailedly; aparts the application to several function modules following the software engineering thought; expatiates each module’s implementation and skill cruces detailedly etc..更多还原