인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Leakage flow at the SEV combustor liner and first-stage vane hub interface can degrade sealing, disrupt purge flows, and increase thermal loads on hot-gas-path components. This study numerically investigated the effects of coolant injection angle and blowing ratio (M) on leakage suppression and film-cooling performance in the secondary flow path of an F-class gas turbine using ANSYS CFX. The computational domain encompassed the main-flow passage, secondary flow path, seal-sheet structure, and a simplified vane leading-edge model. Sealing characteristics was analyzed via cross-sectional flow structures and temperature distributions, while cooling performance was evaluated using adiabatic film-cooling effectiveness on the liner endwall and vane hub. Under horizontal injection, coolant impinged on the vane hub, lost momentum, and allowed hot mainstream gas to recirculate into the secondary passage. Conversely, changing the injection angle to 30° effectively suppressed hot-gas ingestion, reducing the internal temperature by 300–400 °C. Furthermore, increasing the blowing ratio from 0.5 to 2.0 at a 30° angle strengthened fluidic sealing, lowering temperatures by roughly 300–500 °C. While the liner endwall achieved maximum cooling effectiveness at M = 1.0, the vane hub showed continuous improvement up to M = 2.0. Ultimately, combined optimization of injection angle and blowing ratio is essential for ensuring the thermal integrity of liner–vane interface components.
본문·목차
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.