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Prediction of the Effects of the Rotating Speed on Blade Erosion Rate
In-won Kim(김인원),C.Palani Kumar(쿠마르),Tae-Hoon Song(송태훈),Kwon-Hee Lee(이권희),Tae-Choon Park(박태춘),Bong-Jun Cha(차봉준),Heuy-Dong Kim(김희동) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
In a gas turbine with wet compression system installed, erosion of compressor blades may occur due to fine water droplets hitting the surface. Numerical simulations are performed to study this phenomenon. The computational domain consists of a rotating plate on which four airfoil shaped blades are mounted. This is representative of a simultaneous experiment being performed. Sliding mesh method is used to incorporate rotary movement of the blades. Water is injected as spray using an impact-pin nozzle. Experimentally measured spray parameters like the flow rate, particle diameter, etc. are given as initial and boundary conditions in the simulations. Discrete Phase Model(DPM) is used to track the particles in the domain. Droplet parameters like average velocity, diameter and number of droplets hitting each cell on the blade surface are monitored. These parameters are then used in an empirical model to predict the rate of erosion on the surface. In this work, the effect of various blade rotational speed (rpm) on the blade erosion is reported.