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가스터빈 프리스월 시스템의 외기 온도와 터빈 부하 조건에 따른 탈설계점 특성 분석Off-design Characteristics for Ambient Air Temperature and Turbine Load of Gas Turbine Pre-swirl System

Other Titles
Off-design Characteristics for Ambient Air Temperature and Turbine Load of Gas Turbine Pre-swirl System
Authors
Park, HyunwooLee, JungsooCho, GeonhwanCho, Jinsoo
Issue Date
Dec-2019
Publisher
KOREAN SOC AERONAUTICAL & SPACE SCIENCES
Keywords
Ambient Air Temperature; Gas Turbine; Off-design; Pre-swirl System; Secondary Air System; Turbine Load
Citation
JOURNAL OF THE KOREAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, v.47, no.12, pp.881 - 889
Indexed
KCI
Journal Title
JOURNAL OF THE KOREAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES
Volume
47
Number
12
Start Page
881
End Page
889
URI
https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/11586
DOI
10.5139/JKSAS.2019.47.12.881
ISSN
1225-1348
Abstract
The pre-swirl system is the device that minimizes energy loss of turbine cooling airflow from the stationary parts into rotating parts. In this paper, an off-design analysis was conducted for the ambient air temperature and turbine load conditions. The discharge coefficient was constant for ambient air temperature and turbine load. However, adiabatic effectiveness was increased. This is due to the volume flow rate. The volume flow rate was increased at higher ambient temperature and higher turbine load. It means that the volume of cooling air was increased and the cooling performance of the air was improved. Consequently, adiabatic effectiveness increased by 30.46% at 100% turbine load compared to 20% turbine load. And increased by 18.42% at 55 degrees C ambient air temperature compared to -20 degrees C ambient air temperature.
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