냉각성능 향상을 위한 고압터빈 노즐의 막냉각홀 배치설계

Abstract

This study presented that the arrangement design of the film cooling hole was conducted to improve the cooling performance. For this end, the first stage nozzle vane of the E3(Energy Efficient Engine) was modeled based on the NASA report. Design variables were selected for the location of the streamwise direction, and the arrangement design was performed to decrease the average temperature and uniformity on the vane surface. For the efficient design, the injection region was applied for the cooling effect when RANS analysis was performed. At this time, a neural network model was constructed to correspond to the cooling flow rate for the location of the cooling hole. As a result, the cooling hole arrangement was obtained, which had an average temperature lower 10 K and uniformity improved by 6% on the vane surface.