【作者】 黄全军；

【导师】 刘顺隆；

【作者基本信息】 哈尔滨工程大学 ， 轮机工程， 2005， 硕士

【摘要】 燃气轮机具有效率高、体积小、重量轻、维护简单、运行可靠、自动化程度高、造价低等优点,因此广泛应用在航空工业、陆用发电、天然气输送、石油、铁路和造船工业中。而涡轮是燃气轮机将热能转变为机械能的一个重要部件,其气动特性的好坏直接影响着整个燃气轮机的效率。 随着计算流体力学的发展及计算机的发展,数值模拟涡轮内部的流场已经成为可能,应用数值模拟的方法可以对实验难以测量的参数进行预估,可以很精确的模拟出其内部的流场分布的特点,而不需要大量的实验,应用数值模拟的方法对涡轮的流场进行分析和研究,有利于提高工作的可靠性和经济性,因此数值模拟的方法是研究涡轮内部过程机制的一个重要手段。 本文针对某型涡轮的第一级稳态三维湍流的数值模拟进行了研究,利用Gambit软件建立涡轮的计算模型及其计算网格,并利用全三维数值模拟软件FLUENT 6.0涡轮内部流动进行了模拟,计算中采用标准k-ε双方程湍流模型和SIMPLE算法。通过对其结果的比较与分析,及其与实验结果的对比,得出了对单列的动叶和静叶计算结果与利用混合平面所计算出一级的结果的区别,得出了一些重要的结论。更多还原

【Abstract】 Gas turbine has the advantages of high efficiency, small volume, lightness, simple maintenance, good flexibility, high reliability of operation, high degree of automatism and low cost. At present , it is widely used in shipbuilding industry. but turbine is a important component of gas turbine which will change heat engine for machine engine, its stand or fall gas characteristic will directly affect the efficiency of a whole gas turbi ne.With the rapid development of computational fluid dynamics and computer, Numerical simulation of flow field in turbine has been possible, applying of numerical simulation can estimate the parameters which are not easy to measure from experiments, and exactly simulate the characteristic of flow field in turbine, and do not need many experiment .using numerical simulation method to analysis and research the flow field in turbine can improve reliability and reduce the cost. So numerical simulation method is a important means to research the inner mechanism of turbine.In this article, numerical simulation of three dimension steady outflow of the fist stair of some turbine model is studied. Fist ,according to the requirement of engineering software, using the software Gambit make computational model and computational grid of the turbine, then using the software Fluent 6. 0 simulate the inner flow in turbine. During computing standard k-ε couple equation turbulence model and SIMPLE arithmetic are applied. After comparing and analyzing their result, and comparing the result with experiment, we obtain difference between the result of single row moving cascade and the result of single row nozzle and the resultof one stair of turbine which computing with mixing plane, and we obtain some important conclusion.更多还原