Session: 32-06 Purge and Cooling Flows
Paper Number: 151746
Impact of the Stator-Side Swirler on Turbine Rim Sealing Effectiveness
An increase in turbine inlet air temperature (TIT) can affect the ingestion of hot mainstream into the wheel space between the stator and rotor disk, leading to thermal damage. Recent studies have suggested that reducing the difference in swirl (tangential velocity) between the main flow and the sealing flow can decrease such ingestion. A swirler mounted on the rotor-side increased the swirl within the wheel space and improved sealing effectiveness. Yet, a drawback of the rotor-side swirler is that work is expended to rotate the swirler on the rotor. Therefore, this paper reports on measurements of how a swirler installed on the stator-sides affects the swirl ratio and sealing effectiveness within the wheel space. The stator-side swirler increases the swirl ratio of the sealing flow and enhances the sealing effectiveness. Thus, the minimum sealing mass flow rate required for complete sealing is reduced. In addition, an aircraft incorporating a stator-side swirler has been analyzed. According to the analysis, the reduction in sealing mass flow rate results in cycle benefits such as increased turbine power and decreased specific fuel consumption (SFC). Therefore, the stator-side swirler effectively prevents hot gas ingestion into the wheel space while reducing the required sealing mass flow rate and enhancing turbine cycle benefits.
Presenting Author: Youngkuk Yoon Seoul National University
Presenting Author Biography: Youngkuk Yoon received Bachelor's, Master's, Doctoral's degrees in Department of Mechanical Engineering at Seoul National University in Republic of Korea. His research interests are the turbo machines, especially cavitation in turbo pump and preventing gas ingestion in turbine.
Authors:
Janghoon Kang Seoul National UniversitySung Jong Joo University of Oxford
Youngkuk Yoon Seoul National University
Geonhwan Cho Hanwha Aerospace
Seung Jin Song Seoul National University
Impact of the Stator-Side Swirler on Turbine Rim Sealing Effectiveness
Paper Type
Technical Paper Publication