Analysis of exhaust flow characteristics of power unit under different chimney outlet angles
The exhaust chimney is located at the end of the gas turbine exhaust system and plays a certain role in the drainage of the gas flow from the exhaust pipe.The flow resistance of exhaust system,temperature field distribution in ex-haust area and gas diffusion are affected by different exhaust chimney outlet angles.Therefore,it is of great significance to study the outlet angle of exhaust chimney to improve the flow characteristics of exhaust system.Taking a certain type of ship as the research object,this paper establishes a numerical model of the flow characteristics of the gas turbine inlet and ex-haust system,carries out the trend of the change of the exhaust flow characteristics with the external wind speed and direc-tion under different exhaust chimney angles,and further explores the influence of the chimney outlet Angle on the wall tem-perature distribution and exhaust diffusion under different wind speed and direction conditions.The influence of the chim-ney outlet Angle on the flow field and temperature field in the exhaust area is analyzed from multiple angles.The results show that under certain constraint conditions,the exhaust flow performance and the average temperature of the chimney wall are the best when the outlet Angle of the exhaust chimney is 45°.Moreover,there was no obvious diffusion of smoke near the deck,and no smoke suction at the inlet of the intake system.The research work in this paper provides ideas for the design of exhaust chimney structure under the requirement of waterproof gun,and has practical application value.
gas turbinechimney angleflow characteristicexhaust diffusion
万方数据
维普
