Indian Journal of Science and Technology

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Experimental Investigation on a Centrifugal Compressor by Means of Rectangular, Elliptical and Sloping Squealer Tips


Affiliations
1 Dept. of Mechanical Engineering, Mailam Engineering College, Villupuram–604 304, TamilNadu, India
2 Dept. of Mechanical Engineering, Annamalai University, Chidambaram-608 002, Tamil Nadu, India
 

The objective of the present investigation is to explore the possibility of using different types of squealers to improve the performance of centrifugal compressor. The following experiments are carried out to achieve the objectives: measurement of performance of the compressor with rectangular squealers, elliptical squealers and sloping squealers, impeller exit traverse with a pre-calibrated five hole probe for all configuration at three coefficients, viz ∅ = 0.28 (near design), ∅= 0.34 (above design) and ∅ = 0.18 (below design) and static pressure distribution on the shroud over the impeller at the above three flow coefficient. From the present investigation, it is concluded that sloping type squealer tip has beneficial effects in increasing energy co-efficient and efficiency of the compressor.

Keywords

Centrifugal Compressor, Spacers, Squealers, Tip Clearance, Performance Characteristics
User

  • Ameri AA, Rigby DL and Steinthorsson E (1998) Effect of Squealer Tip on Rotor Heat Transfer and efficiency. Trans. ASME J1. Turbomachinery. 120, 753-759.

  • Azad, Gm., Han SJ-C and Boyle RJ (2000) Heat Transfer and flow on the Squealer tip of a gas turbine blade. Trans. ASMEJ1. Turbomachinery. 122, 725-732.

  • Biba Yuri (2004) Inverse design of centrifugal compressor stages using a meanline approach. Intl. J. Rotating Machinery. 135, 146-157.

  • Cui Michael M (2005) Comparative study of unsteady flows in a transonic centrifugal compressor with vaneless and vaned diffusers. Intl. J. Rotating Machinery. 187, 86-98.

  • Heyes FJG, Hodson HP and Dailey GM (1992) The effect of blade tip geometry on the tip leakage flow in axial turbine cascade. Trans. ASME J1. Turbomachinery. 114, 643-651.

  • Krain H (1987) Experimental and theoretical analysis of centrifugal impeller flow. Proc. Inst. Mech. Engrs. Conf. Paper C270/87, 199-209.

  • Krain Harmut (2002) Unsteady diffuser flow in a transonic centrifugal compressor. Intl. J.Rotating Machinery. 86, 112-123.

  • Pampreen (1973) Tip leakage flow in Axial and centrifugal compressors. Trans. ASME J1. Turbomachinery. 113, 252-261.

  • Senoo and Ishida (1987) Deterioration of compressor performance due to tip clearance of centrifugal impellers. Trans. ASME J1. Turbomachinery. 109, 55-61.

  • Senoo (1981) on the pressure losses due to the tip clearance of centrifugal blower. Trans. ASME J1. Engg. for Power. 103, 271-278.

  • Shridhara (2001) Review: recent investigations on tip clearance effects in centrifugal compressors. Int. J1 Jet Engines & Turbomachines. 42, 309-315.


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  • Experimental Investigation on a Centrifugal Compressor by Means of Rectangular, Elliptical and Sloping Squealer Tips

Abstract Views: 569  |  PDF Views: 83

Authors

S. Senthil
Dept. of Mechanical Engineering, Mailam Engineering College, Villupuram–604 304, TamilNadu, India
N. Krishna Mohan
Dept. of Mechanical Engineering, Annamalai University, Chidambaram-608 002, Tamil Nadu, India

Abstract


The objective of the present investigation is to explore the possibility of using different types of squealers to improve the performance of centrifugal compressor. The following experiments are carried out to achieve the objectives: measurement of performance of the compressor with rectangular squealers, elliptical squealers and sloping squealers, impeller exit traverse with a pre-calibrated five hole probe for all configuration at three coefficients, viz ∅ = 0.28 (near design), ∅= 0.34 (above design) and ∅ = 0.18 (below design) and static pressure distribution on the shroud over the impeller at the above three flow coefficient. From the present investigation, it is concluded that sloping type squealer tip has beneficial effects in increasing energy co-efficient and efficiency of the compressor.

Keywords


Centrifugal Compressor, Spacers, Squealers, Tip Clearance, Performance Characteristics

References





DOI: https://doi.org/10.17485/ijst%2F2009%2Fv2i7%2F29493