Year: 2024
Type: article
Abstract: Through the CFD analysis, this paper studied the characteristics of swirl angles in a pre-swirl system, which includes radial receiver-holes.This research investigated the effect by varying only the swirl angle while maintaining throat area, and boundary conditions, and compared the design factors such as swirl ratio, discharge coefficient, and total temperature drop effectiveness.As the swirl angle increased within the range of 20 to 80 degrees, the swirl ratio at the nozzle exit decreased.Conversely, at the receiver-hole exit and the system exit, both increasing and decreasing trends in the swirl ratio were observed.Both the discharge coefficient of nozzle and total system increased as the swirl angle increased, however, at lower swirl angles, there was a difference in two discharge coefficients due to losses at the receiver-holes.The total temperature drop effectiveness decreased as the swirl angle increased.Through the results, this study proposed a suitable design swirl ratio range according to the design requirements of pressure and temperature for cooling the blades. 초 록반경방향 리시버홀을 포함하는 프리스월 시스템의 스월각에 따른 특성을 전산유체역학 해석을 통해 확인했다.프리스월러의 목면적과 경계조건은 일정한 상태에서 스월각만 변화시키며 그 영향을 파악했으며, 설계인자인 스 월비, 유량계수, 전온도 강하 효율을 비교했다.
Authors: Hyungyu Lee, Hyojun Yang, Jongseon Kim, Geonhwan Cho
Language: English
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4404193903