Numerical Simulation Of Three-Dimensional Turbulence Flow In The Cascade Of Turbine

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.