Numerical Simulation Of Fluid Structure Interaction Of Steam-cooling Turbine Vane

Gas turbine has the advantages of efficient, small volume, lightness, simpleness of maintenance, good flexibility, high reliability of operation, high degree of automatization and low cost. At present it is widely used in aviation, power station, natural gas transportation, petroleum, railway and shipbuilding industry. For compact high efficiency turbines to operate at near stoichiometric inlet temperatures, the cooling of turbine blades is a critical issue. So far, many kinds of method of blade-cooling have been presented. And there is a new type of open-cooling project that using the air from compressor as cooling medium has many advantages. According to it, cooling air that comes from the high stage or exit of compressor flows through inside passages of turbine blades, then inject into the gas flow outsides. But air-cooling brings a series of additional loss. The most loss is the used cooling air has consumed a lot of compressing power. The result is falling efficiency of gas turbine.Therefore, naturally the new type of cooling medium is called to instead of air. It should provide better cooling efficient and less losses. As result, steam used as cooling medium meets the former demand. Compared to air, the need to product steam is just heat energy, thus the consumption of water pump and engine power is little. So the total loss of steam-cooling is less then air-cooling. So it is realizable that we could increase inlet gas temperature the mass flow of steam increased. In addition, because the press of steam isn't limited by compressor outlet press as air, the mass flow can be increased easily that weren't face problems in the aspect of internal flow loss.In this article, numerical simulation of three dimension steady outflow of the vane of some turbine model is studied. First, according to the requirement of engineering software, using the software Pro/E and ANSYS ICEM make computational model and computational grid of the vane. A thermal-field simulation is taken by the means of ANSYS CFX, by usingκ-εturbulence models. Introducing a Finite-Element-Based Control-Volume Method For Solving The Three-Dimensional Navier-Stokes Equations, and simply introducing Fully coupled Incompletion Lower Upper (ILU) technology and Algebraic Multi-grid method to solve the problem, at last we simply introduce how the characteristic translation in Fluid Structure Interaction technology.The present study numerically investigates a conceptual type of internal steam cooling vane with the impingement cooling technology on the basis of plane mode and concave model. A series of comparison investigations of temperature and heat transfer coefficient are received. Taking these results, a designed impingement cooling vane is designed, which works on the ANSYS workbench, and the conjugated heat transfer is studied by the means of ANSYS CFX Navier-Stokes code using K-εturbulence model for gas field and cooling field. The numerical results of the effects of cooling flow heat transfer in the vane are received to evaluate the damage of the vane during steady state operation conditions.