Prediction Of Particle Deposition Near Cooling Holes Of Turbine Blade

Gas turbine construction is a continuously improving and developing mechanical engineering industry,which is used in aviation,shipbuilding,heat power engineering.One of the most important gas turbine's criteria is efficiency.The main obstacle to increasing efficiency is the increase in temperature after the combustion chamber and at the turbine inlet.To overcome this question,it is necessary to improve the properties of the blade material,gas-dynamic and strength characteristics.One of these characteristics is the corrosion resistance of the turbine blades.This parameter is changed by doping and finding new materials,as well as by predicting and understanding the movement of corrosive substances,such as particles of the combustion products during fuel burning.Prediction of moving of the particles near the cooling holes of the blades is an important part on the way to the corrosion prevention.These predictions will help us find the fields of the surfaces that are subjected to severe erosion.Reducing the deposition will reduce the time spent cleaning the engine and increase the life of the hardware.As usual,the particles are deposited near the cooling holes,which interfere the normal operation of these elements,not providing proper cooling of the blade.In this paper,the motion of particles near the cooling holes is considered,the main purpose of this work is to predict the motion of particles near the cooling holes.The tasks that have been set and solved are presented below the literature of particle deposition were analyzed.The systematic process and analysis of modeling parameters are shown.After that,the solution is verified with an existing model.Various models of particle sticking and rebounding are presented,and then one of the model of sticking/rebound particles was modified,with the approach of comparing with experimental data,and applied in calculation softare.Calculations were made of the main physical parameters of the General Electric Energy Efficient Engine(GE-E3)turbine model with the cooling holes where calculation of the modified model sticking/rebounding of the particles was introduced into the program.The calculation of the physical parameters of the simplified model of the turbine blade with cooling holes with a change in the geometric parameters of the blade wall was made.Some suggestions are recommended for further research and development in this field.The geometry of the particle location was created.The flow characteristics were calculated when the particle was on the surface of the blade.The cooling efficiency in the presence of precipitation of particles on it was calculated.The relevance of this work is due to the need to increase the corrosion resistance of the turbine blade,it requires a mathematical explanation of the motion of particles near the surface of the blade.