부분분사 축류형 마이크로터빈에서의 성능예측 및 성능특성에 관한 연구 = Performance Characteristics and Prediction on a Partially Admitted Single-Stage Axial-Type Micro Turbine

다국어 초록 (Multilingual Abstract)

For axial-type turbines which operate at partial admission, a performance prediction model is developed. In this study, losses generated within the turbine are classified to windage loss, expansion loss and mixing loss. The developed loss model is compared with experimental results. Particularly, if a turbine operates at a very low partial admission rate, a circular-type nozzle is more efficient than a rectangular-type nozzle. For this case, a performance prediction model is developed and an experiment is conducted with the circular-type nozzle. The predicted result is compared with the measured performance, and the developed model quite well agrees with the experimental results. So the developed model could be applied to predict the performance of axial-type turbines which operate at various partial admission rates or with different nozzle shape.

참고문헌 (Reference)

1 "Un Tersuchungen uber den ventilationsverlust von Turbinenradern Mitteilungen aus dem Inst. fur thermische Turbomaschinen" 1960

2 "Theories for Predicting Partial-Admission Losses in Turbines J. of the Aerospace Sciences" 489-490, 1962

3 "Supersonic Turbines for Organic Fluid Rankine Cycles from 3kW to 1300kW" 1987vkilectureseries1987-09.

4 "Partial Steam Admission in an Axial Turbine Stage" 681-691, 1999

5 "Nonsteady Flow in the Partial Admission" 395-401, 1994

6 "J. of Eng. for Power" 341-348, 1968

7 "Influence of the Cross-Over Channel Geometry on the Flow Equalization in Partial-Admission Turbines" 49-54, 1998

8 "Experimental and Theoretical Investigations into the Nonuniform Flow of a Partial Admission Turbine with a Multistage Blading" 610-608, 1993

9 "Effects of Partial Admission on Performance of A Gas Turbine" 1949

10 "Design of Turbines for High energy fuel low power output applications" 1953

11 "Computation of Unsteady Flow Through Steam Turbine Blade Row at Partial Admission" 211 : 197-205, 1997

12 "Calculating the Windage Losses in a Turbine Stage" 19 : -11, pp.33-37.