- Volume 13 Issue 1
Experimental study on the flow field inside the nozzle for radial turbine was performed. At design point, the pressure is high and the Mach number is low at the pressure side of the nozzle inlet semi-vaneless space as the flow turns through the nozzle vanes. As the flow accelerates through the nozzle passage to the throat the pressure level at the pressure and suction sides becomes similar. The flow continued accelerating from the throat to the inlet of turbine wheel and the pressure field became uniform in the circumferential direction in the vaneless space. In high expansion ratio condition, strong favorable pressure gradient band region occurred just after the throat in the semi-vaneless space in the circumferential direction and the pressure became uniform in the circumferential direction after this band. In low expansion ratio condition, core flow acceleration is dominant after the throat and this non-uniform pressure field reached to the inlet of turbine wheel.
- Kano, F., Tazawa, N. and Fukao, Y., 1982, "Aerodynamic Performance of Large Centrifugal Compressors," ASME Journal of Engineering for Power, Vol. 104, pp. 796-804. https://doi.org/10.1115/1.3227346
- Krain, H., 1981, "A Study on Centrifugal Impeller and Diffuser Flow," ASME Journal of Engineering for Power, Vol. 688-696. https://doi.org/10.1115/1.3230791
- Yoshinaga, Y., Gyobu, I., Mishina, H., Koseki, F. and Nishida, H., 1980, "Aerodynamic Performance of a Centrifugal Compressor With Vaned Diffusers," ASME Journal of Fluids Engineering, Vol. 102, pp. 486-493. https://doi.org/10.1115/1.3240730
- Verdonk, G., 1978, "Vaned Diffuser Inlet Flow Conditions for a High Pressure Ratio Centrifugal Compressor," ASME Paper No. 78-GT-50.
- 강정식, 강신형, 2001, "원심압축기 채널디퓨저 내부의 압력 분포에 관한 연구" 대한기계학회논문집 B권, 제25권 제4호, pp. 507-513.
- Khalil, I. M., Tabakoff, W. and Hamed, A., 1976, "Losses in Radial Inflow Turbines," ASME Journal of Fluids Engineering, Sept., pp. 364-371. https://doi.org/10.1115/1.3448323
- Hashemi, S. G. R., Lemak, R. J. and Owczarek, 1984, "An Investigation of the Flow Characteristics and of Losses in Radial Nozzle Cascades," ASME Journal of Engineering for Gas Turbine and Power, Vol. 106, pp. 501-510. https://doi.org/10.1115/1.3239597
- 강정식, 임병준, 양재준, 안이기, 2009, "APU용 구심터빈의 공력리그시험" 대한기계학회 유체공학부문 춘계학술대회 논문집, pp. 348-353.
- Kang, J. S., Yang, J. J., Cha, B. J., Ahn, I. K. and Lee, D. S., 2009, "An Experimental Study of a Radial Inflow Turbine for an APU," ACGT2009-TS29, Tokyo, Japan.
- 강정식, 양재준, 차봉준, 안이기, 2008, "2500마력급 고온 터빈 성능시험실비의 개발" 제16회 지상무기 학술대회, pp. 181.
- Performance Analysis by CFD and Aerodynamic Design of 100kW Class Radial Turbine Using Waste Heat from Ship vol.35, pp.2, 2011, https://doi.org/10.5916/jkosme.2011.35.2.175