가스터빈 이차 냉각 유로에 적용되는 프리스월러 노즐의 분사 방식차이에 따른 시스템 특성 연구Comparative Study on a Tangential and Radial On-Board Injection Pre-swirl System of Gas Turbine Secondary Air System
- Other Titles
- Comparative Study on a Tangential and Radial On-Board Injection Pre-swirl System of Gas Turbine Secondary Air System
- Authors
- 김상욱; 이현규; 이정수; 김동화; 조진수
- Issue Date
- Feb-2018
- Publisher
- 한국유체기계학회
- Keywords
- Computational Fluid Dynamics(전산유체역학); Cooling System(냉각 시스템); Gas Turbine(가스 터빈); Pre-swirler(프리스월러); Radial On-Board Injection(반경 방향 분사 방식); Tangential On-Board Injection(접선 방향 분사 방식)
- Citation
- 한국유체기계학회 논문집, v.21, no.1, pp.19 - 26
- Indexed
- KCI
- Journal Title
- 한국유체기계학회 논문집
- Volume
- 21
- Number
- 1
- Start Page
- 19
- End Page
- 26
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/2727
- DOI
- 10.5293/kfma.2018.21.1.019
- ISSN
- 2287-9706
- Abstract
- Pre-swirler is classified into the Tangential On-Board Injection (TOBI) type and the Radial On-Board Injection (ROBI). The TOBI type has a spatial margin from the duct inlet to the pre-swirler inlet, it is possible to install an additional guide system that can create the pre-swirl effect, maximize system performance. Whereas, the ROBI type has the advantage of making the pre-swirl effect even when the installation space of the secondary cooling air system is insufficient. In this study, two types of the pre-swirl system performance were compared by selecting the ROBI type with the same swirl ratio and mass flow rate as the TOBI type. When the swirl ratio of two types were the same, the temperature drop was not significantly different, but the discharge coefficient of the ROBI type was 8.1% higher than the TOBI type. When the mass flow rate of the two types were the same, the temperature drop of the TOBI type was 13.8% higher than the ROBI type and the discharge coefficient of the TOBI type was 4.1% lower than the ROBI type.
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