Browse > Article
http://dx.doi.org/10.5139/JKSAS.2002.30.4.099

A Study of the One-Stage Axial Turbine Performance with Various Axial Gap Distances between the Stator and Rotor  

Kim, Dong-Sik (경상대학교 항공기계공학과 대학원)
Cho, Soo-Yong (경상대학교 항공기부품기술연구센터)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.30, no.4, 2002 , pp. 99-105 More about this Journal
Abstract
The performance test of an axial-type turbine is carried out with various axial gap distances between the stator and rotor. The turbine is operated at the low pressure and speed, and the degree of reaction is 0.373 at the mean radius. The axial-type turbine consists of ons-stage and 3-dimensional blades. The chord length of rotor is 28.2mm and mean diameter of turbine is 257.56mm. The power of turbo-blower for input power is 30kW and mass flow rate is $340m^3$/min at 290mmAq static-pressure. The RPM and output power are controlled by a dynamometer connected directly to the turbine shaft. The axial gap distances are changed from a quarter to three times of stator axial chord length, and performance curves are obtained with 9 different axial gaps. The efficiency varies about 8% of its peak value due to the variation of axial gap on the same non-dimensional mass flow rate and RPM, and experimental results show that the optimum axial gap is 1.6-1.9Cx.
Keywords
Axial-Type Turbine; Turbine Performance Test; Blade Axial Gap; Turbine Efficiency;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Cofer, J. I., Reiner, J. K. and Summer, W.J., “Advances in Steam Path Technology,"GER-3713D, 1993, pp.1-25.
2 홍용식, “가스터어빈 엔진 이론과응용," 청문각, 1983, pp.276-285.
3 Glassman, A. J., “Computer Code for Preliminary Sizing Analysis of Axial-Flow Turbines," 1992, NASA-CR-4430
4 Ramsden, K. W., "Axial Turbine DesignManual; TURB94-2, AnnexF," Cranfield University,1994
5 Cookson, R., "Short Cource Lecture Note:Turbine Design and Performance", CranfieldUniversity, 1995, pp.20-23.
6 TAXIG, "An Interactive Graphics System for the Design and Analysis of Axial flow Turbines, User Guide book Appendix F," 1995
7 Korakianitis, T., "Influence of Stator-Rotor Gap on Axial-Turbine Unsteady Forcing Functions,"1993, AIAA J., Vol. 31, No. 7, pp.1256-1264.   DOI   ScienceOn
8 김동식, 조수용, “회전부를 장착한 3차원 축류형 터빈 시험장치 개발”, 한국항공우주학회 춘계발표논문집, 2001, pp.178-1830
9 장범익, “축류형 3차원 터빈 블레이드의 설계기술에 관한 연구," 2001, 경상대학교 대학원 석사학위논문
10 Carter, A. F., Pratt, M. and Lenberr, F. K., “Analysis of Geometry and Design Point Performance of Axial Turbine," 1967, NASACR-CR-1181