Main Article Content
Abstract
The present paper reports measurement of periodic static pressures on the casing over the impeller of a low speed centrifugal compressor at different stage loadings and tip clearances. The periodic pressure data is acquired employing the technique called PLEAT. Experiments are carried out in a low speed centrifugal compressor with unshrouded impeller. Twelve holes are provided on the casing in which adapters are attached. A fast response pressure transducer, Kulite XCS-062 5pisd is inserted in the adapters. The pressure transducer measures pressure in terms of voltage. The voltage output is very low. The output voltage is amplified and converted to digital values for further processing of data. Sample results are presented and interpreted. From the measured static pressure, tip clearance flows can be easily identified. Effect of tip clearance and stage loading on tip clearance flows is highlighted.
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Article Details
References
- Engeda, A. and Rautenberg, M., "Comparisons of the Relative Effect of Tip Clearance on Centrifugal Impellers", ASME Journal of Turbomachinery, Vol.109, No.4, pp.545-549, 1987. https://doi.org/10.1115/1.3262146.
- Ishida, M., Ueki, H. and Senoo, Y., "Effect of Blade Tip Configuration on Tip Clearance Loss of a Centrifugal Impeller", ASME Journal of Turbomachinery, Vol.112, No.1, pp.14-18, 1990. https://doi.org/10.1115/1.2927412.
- Ishida, M. and Senoo, Y., "On Pressure Losses Due to the Tip Clearance of Centrifugal Blowers", ASME Journal of Engineering for Power, Vol.103, No.2, pp.271-278, 1981. https://doi.org/10.1115/1.3230717.
- Sitaram, N. and Shridhara, T. N., "Review: Recent Investigations on Tip Clearance Flows in Centrifugal Compressors", International Journal of Turbomachines and Jet Engines, Vol.17, No.1, pp.65-78, 2000. https://doi.org/10.1115/TJJ.2000.17.1.65.
- Ushasri, P. and Sitaram, N., "Effect of Tip Clearance in a Low Speed Centrifugal Compressor", ASME Paper No.FEDSM2005-77153, pp.1665-1672, 2005. https://doi.org/10.1115/FEDSM2005-77153.
- Yamada Kazutoyo.,Tamagawa Yusuke., Fukushima Hisataka., Furukawa Masato., IbarakiSeiichi and Iwakiri Ken-ichiro., "Comparative Study on Tip Clearance Flow Fields in Two Types of Transonic Centrifugal Compressor Impeller with Splitter Blades", ASME Paper No. GT2010-23345, pp.2053-2063, 2010. https://doi.org/10.1115/GT2010-23345.
- Kunte Robert., Schwarz Philipp., Wilkosz Benjamin., Jeschke Peter and Smythe Caitlin., Experimental and Numerical Investigation of Tip Clearance and Bleed Effects in a Centrifugal Compressor Stage with Pipe Diffuser", ASME Journal of Turbomachinery, Vol.135, No.1, pp.011005-01 to 011005-12, Paper No.TURBO -11-1099, 2012 https://doi.org/10.1115/1.4006318.
- Buffaz Nicolas and Trébinjac Isabelle., "Impact of Tip Clearance Size and Rotation Speed on the Surge Onset in a High Pressure Centrifugal Compressor", ASME Paper No.GT2012-68427, pp.2491-2500, 2012. https://doi.org/10.1115/GT2012-68427.
- Ju Wenying., Xu Shengli., Wang Xiaofang., Chen Xudong., Yang Shuhua and Meng Jigang., "Numerical Study on the Influence of Tip Clearance on Rotating Peak Energy Coefficient in an Unshrouded Centrifugal Compressor", ASME Paper No. GT2017 - 64452, V02DT46A025, 8 Pages, 2017. https://doi.org/10.1115/GT2017-64452.
- Sitaram, N., Govardhan, M. and Murali, K. V., "Effects of Stage Loading on Performance and Flow Field of a Centrifugal Compressor with Inlet Pressure Distortion", Journal of Aerospace Sciences and Technologies, Vol.67, No.3, pp.416-438, 2015.
- https://www.kulite.com/assets/media/2018/01/XCS-062.pdf
- Lakshminarayana, B., "Techniques for Aerodynamics and Turbulence Measurements in Turbomachinery Rotors", ASME Journal of Engineering for Power, Vol.103, No.2, pp.374-392, 1981. https://doi.org/10.1115/1.3230732.
References
Engeda, A. and Rautenberg, M., "Comparisons of the Relative Effect of Tip Clearance on Centrifugal Impellers", ASME Journal of Turbomachinery, Vol.109, No.4, pp.545-549, 1987. https://doi.org/10.1115/1.3262146.
Ishida, M., Ueki, H. and Senoo, Y., "Effect of Blade Tip Configuration on Tip Clearance Loss of a Centrifugal Impeller", ASME Journal of Turbomachinery, Vol.112, No.1, pp.14-18, 1990. https://doi.org/10.1115/1.2927412.
Ishida, M. and Senoo, Y., "On Pressure Losses Due to the Tip Clearance of Centrifugal Blowers", ASME Journal of Engineering for Power, Vol.103, No.2, pp.271-278, 1981. https://doi.org/10.1115/1.3230717.
Sitaram, N. and Shridhara, T. N., "Review: Recent Investigations on Tip Clearance Flows in Centrifugal Compressors", International Journal of Turbomachines and Jet Engines, Vol.17, No.1, pp.65-78, 2000. https://doi.org/10.1115/TJJ.2000.17.1.65.
Ushasri, P. and Sitaram, N., "Effect of Tip Clearance in a Low Speed Centrifugal Compressor", ASME Paper No.FEDSM2005-77153, pp.1665-1672, 2005. https://doi.org/10.1115/FEDSM2005-77153.
Yamada Kazutoyo.,Tamagawa Yusuke., Fukushima Hisataka., Furukawa Masato., IbarakiSeiichi and Iwakiri Ken-ichiro., "Comparative Study on Tip Clearance Flow Fields in Two Types of Transonic Centrifugal Compressor Impeller with Splitter Blades", ASME Paper No. GT2010-23345, pp.2053-2063, 2010. https://doi.org/10.1115/GT2010-23345.
Kunte Robert., Schwarz Philipp., Wilkosz Benjamin., Jeschke Peter and Smythe Caitlin., Experimental and Numerical Investigation of Tip Clearance and Bleed Effects in a Centrifugal Compressor Stage with Pipe Diffuser", ASME Journal of Turbomachinery, Vol.135, No.1, pp.011005-01 to 011005-12, Paper No.TURBO -11-1099, 2012 https://doi.org/10.1115/1.4006318.
Buffaz Nicolas and Trébinjac Isabelle., "Impact of Tip Clearance Size and Rotation Speed on the Surge Onset in a High Pressure Centrifugal Compressor", ASME Paper No.GT2012-68427, pp.2491-2500, 2012. https://doi.org/10.1115/GT2012-68427.
Ju Wenying., Xu Shengli., Wang Xiaofang., Chen Xudong., Yang Shuhua and Meng Jigang., "Numerical Study on the Influence of Tip Clearance on Rotating Peak Energy Coefficient in an Unshrouded Centrifugal Compressor", ASME Paper No. GT2017 - 64452, V02DT46A025, 8 Pages, 2017. https://doi.org/10.1115/GT2017-64452.
Sitaram, N., Govardhan, M. and Murali, K. V., "Effects of Stage Loading on Performance and Flow Field of a Centrifugal Compressor with Inlet Pressure Distortion", Journal of Aerospace Sciences and Technologies, Vol.67, No.3, pp.416-438, 2015.
https://www.kulite.com/assets/media/2018/01/XCS-062.pdf
Lakshminarayana, B., "Techniques for Aerodynamics and Turbulence Measurements in Turbomachinery Rotors", ASME Journal of Engineering for Power, Vol.103, No.2, pp.374-392, 1981. https://doi.org/10.1115/1.3230732.