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터보펌프 터빈 로터의 슈라우드 스플릿이 성능에 미치는 영향
이항기(Hanggi Lee),정은환(Eunhwan Jeong),박편구(Pyungoo Park),윤석환(Sukhwan Yoon),김진한(Jinhan Kim) 한국추진공학회 2013 한국추진공학회지 Vol.17 No.4
A blisk with rotor shroud is usually adopted in LRE turbine to maximize its performance. However it experiences the severe thermal load and resulting damage during engine stating and stop. Shroud splitting is devised to relieve the thermal stress on the turbine rotor. Structural analysis confirmed the reduction of plastic strain at the blade hub and tip. However, split gap at the rotor shroud entails additional tip leakage and results performance degradation. In order to assess the effect of shroud split on the turbine performance, tests have been performed for various settings of shroud split. For the maximum number of shroud splitting, measured efficiency reduction ratio was 2.65% to the value of original shape rotor.