CAJ | 학술논문

提高燃气轮机入口温度是提高其热效率和输出功率的有效措施，但目前燃气轮机进口的燃气温度已远超叶片材料的承受极限。为了降低燃气轮机叶片前缘的温度和提高温度的均匀性，对气膜冷却孔采用Cooling／Bleed （冷气喷射模型）模型，采用S－A（ Spalart－Allmaras）模型，对叶栅进行了三维数值模拟。模拟结果表明：除孔中心下游以外，降低倾斜角有助于降低前缘温度和提高温度的均匀性，另外吹风比越大效果越明显。
제고연기륜궤입구온도시제고기열효솔화수출공솔적유효조시，단목전연기륜궤진구적연기온도이원초협편재료적승수겁한。위료강저연기륜궤협편전연적온도화제고온도적균균성，대기막냉각공채용Cooling／Bleed （랭기분사모형）모형，채용S－A（ Spalart－Allmaras）모형，대협책진행료삼유수치모의。모의결과표명：제공중심하유이외，강저경사각유조우강저전연온도화제고온도적균균성，령외취풍비월대효과월명현。
To improve turbine inlet temperature is an effective measure to improve the thermal efficiency and the output power of the gas-turbine.A 3D numerical simulation,which is based on Cooling/Bleed (air-jet model) model and S-A ( Spalart-Allmaras) turbulent model,was carried out to reduce the temperature of the gas turbine blade leading edge and improve temperature uniformity.The results show that apart from the downstream hole center,reducing tilt angles will help to reduce the temperature at leading edge and improve temperature uniformity,especially in the case of high blow ratio.