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.

주제어

#부분분사   #축류형 동익   #마이크로터빈   #성능예측   #성능시험  

저자의 다른 논문

참고문헌 (14)

1. Robert C. Kohl, Howard Z. Herzig and Warren J. Whitney, 1949, 'Effects of Partial Admission on Performance of A Gas Turbine,' NACA Technical Note No. 1807 
2. Boulbin, F., Hetet, J. F. and Chesse, P., 1994, 'Nonsteady Flow in the Partial Admission,' VDI Berichte NR, 1109, pp. 395-401 
3. Bohn, D., Gier, J., and Ziemann, M., 1998, 'Influence of the Cross-Over Channel Geometry on the Flow FCqualization in Partial-Admission Turbines,' VGB PowerTech 2, pp. 49-54 
4. Skopek, J., Vomela, L., Tajc, L. and Polansky, J., 1999, 'Partial Steam Admission in an Axial Turbine Stage,' IMechE 1999 C557/077/99, pp. 681 -691 
5. Doyle, M. D. C., 1962, 'Theories for Predicting Partial-Admission Losses in Turbines,' J. of the Aerospace Sciences, pp. 489 -490 
6. Suter P., And Traupel, W., 1960, ' Un Tersuchungen uber den ventilationsverlust von Turbinenradern,' Mitteilungen aus dem Inst. fur thennische Turbomaschinen, No. 4 
7. Stenning, A. H., 1953, 'Design of Turbines for High energy fuel low power output applications,' MIT Dynamic Analysis and Control Lab., Rep. No. 79 
8. Balje, O. E. and Binsley, R. L., 1968, 'Axial Turbine Performance Evalustion Part A - Loss Geometry Relationships,' J. of Eng. for Power, pp. 341 -348 
9. Vemeau, A., 1987, 'Supersonic Turbines for Organic Fluid Rankine Cycles from 3kW to 1300kW,' VKI Lecture Series 1987-09 
10. Schlichting, H., 1979, 'Boundary-Layer Theory,' McGraw-Hill Inc., pp. 230 - 233 
11. Horlock, J.H., 1973, 'Axial Flow Turbine,' Robert E. Krieger Publishing Co., pp. 124-126 
12. Frolov, V. V. and Ignatevskii, E. A., 1972, 'Calculating the Windage Losses in a Turbine Stage,' Teploenergetika, Vol. 19, No. 11, pp. 3 3-37 
13. He, L., 1997, 'Computation of Unsteady Flow Through Steam Turbine Blade Row at Partial Admission,' Proc. Instn. Mech. Engrs., Vol. 211 Part A, pp. 197-205 
14. Bohn, D., Drexler, Chr. and Emunds, R., 1993, 'Experimental and Theoretical Investigations into the Nonuniform Flow of a Partial Admission Turbine with a Multistage Blading,' VGB Kraftwerkstechnik 73, No. 8, pp. 610-608 

이 논문을 인용한 문헌 (1)

1. Kim, Jae-Hwan 2007. "" 유체기계저널 = Journal of fluid machinery, 10(1): 91~96  원문보기 상세보기