| During the three-dimensional numerical simulation of gas turbine moisture separators, spraying provides necessary initial conditions for subsequent research on the efficiency characteristics, such as initial spray velocity, granularity, granularity distribution and spraying angle. Nozzle performance has great influence on engineering development of the moisture separator, which demands nozzle of favorite pulverization uniformity. For this purpose, several types of manpowered seawater pulverization chamber were designed in this thesis with simulation on the inner gas-granule flow field through RANS equation and DPM model .Based on that, numerical simulation was conducted on the former model through similarity theory and mechanism analysis was performed on the chamber, with project optimism used to choose better experimental model for subsequent experiment study.Lots of factors are involved in the design of man powered pulverization chamber. It needs more manpower and material resources as well as longer experimental period to understand the characteristic of different type of structure, so numerical simulation studying method has important meaning, in this thesis:1. Obtained numerical simulation results of three types of pulverization chamber flow field consisting of the gas phase and discrete phase. According to the numerical results, the ununiformity of velocity rose from the beginning and drop at some point until to the outlet cross section in the positive direction of z axis; however, the ununiformity of discrete phase concentration decreased in the same direction in the rough. The size of inlet stage and the velocity magnitude of the experimental stage had less influence on the ununiformity of velocity and discrete phase concentration.2. Obtained numerical simulation results of experimental model flow field consisting of gas phase and discrete phase through similarity theory.
|
PDF Full Text Request