International Journal of Fluid Machinery and Systems

한국유체기계학회 (Korean Society for Fluid machinery)
권호 표지
DOI QR코드

DOI QR Code

Tip Clearance Losses - A Physical Based Scaling Method

  • Pelz, Peter F. (Chair of Fluid Systems Technology, Technische Universitat Darmstadt Darmstadt) ;
  • Karstadt, Sascha (Chair of Fluid Systems Technology, Technische Universitat Darmstadt Darmstadt)
  • 심사 : 2010.11.12
  • 발행 : 2010.12.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Tip clearance losses occur in every turbomachine. To estimate the losses in efficiency it is important to understand the mechanism of this secondary flow. Tip clearance losses are mainly caused by a spiral vortex formed on the suction side of the blade of a turbomachine, which induces a drag and also has an influence on the incident flow of the blades. In this paper a physical based scaling method is developed out of an analytical ansatz for the tip clearance losses. This scaling method is validated by measurements on an axial fan with five different tip clearances.

키워드

참고문헌

  1. Pelz, P. F., Heß, M.: “Scaling Friction and Inertia Losses for the Performance Prediction of Turbomachines,” In: 13th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC-13), Paper No.: 122, 2010.
  2. ISO 5136, 2003, “Acoustics - Determination of Sound Power Radiated into a Duct by Fans and Other Air-Moving Devices - In-Duct Method,” Berlin, Beuth Verlag.
  3. Karstadt, S., 2008, “Einfluss des Ringspalts auf die akustischen und aerodynamischen Kenndaten eines Ventilators,” Diploma thesis, Technische Universitat Darmstadt.
  4. Karstadt, S. et al., 2010, “The Influence of Tip Clearance on the Acoustic and Aerodynamic Characteristics of Fans,” Proceedings of ASME Turbo Expo 2010, Paper No.: GT2010-22082. https://doi.org/10.1115/GT2010-22082
  5. Prandtl, L., Betz, A., 1927, “Vier Abhandlungen zur Hydrodynamik und Aerodynamik,” Gottingen.