Numerical Simulation of Impingement Cooling Double Chamber Model with Cross Coolant Hole Arrangements

摘要

Efficiency is one of the most important parameters in evaluating the performance of a gas turbine engine, by increasing the turbine inlet temperature which could increase the gas turbine cycle's efficiency. In order to increase the turbine inlet temperature significantly, an advanced cooling system needs to research and develop. Numerical simulation is performed in this study to impingement cooling enhancement on a double chamber model by changing the coolant hole arrangements. This investigation considers two hole arrangements cases: (1) a total of 18 holes uniformed distribution; (2) two different models with cross holes arranged. Results are exhibited as the surface the temperature distribution, adiabatic impingement cooling effectiveness and velocity contours. The averaged impingement effectiveness over the concave surface with cross hole arrangements are slightly higher than that uniformed distribution model, which the value is improved 16%. The results of this manuscript demonstrate that the coolant hole distribution is one of the most significant impingement cooling parameters over a concave surface.