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Development of state-of-the-art experimental technique to investigate temperature field in leakage flows of positive displacement machines.

Number: 110031

Author(s) : PATEL B., KOVACEVIC A., ALAM M. N., CHAROGIANNIS A.

Summary

Investigation of leakage flows in oil-free rotary positive displacement machines (PDMs) is necessary to get a real insight into attributes of leakage flows. Experimental study of heat transfer in the leakage flows of the oil-free positive displacement machines is challenging. The primary reason is complexities associated with actual machine running condition such as extremely small (micron-size) clearance gap, high speed of rotors, optical access of flows etc. Therefore, this study presents the development of state-of-the-art experimental setup using Planar Laser-Induced Fluorescence (PLIF) technique to visualize the temperature field in the clearance flows of rotary machines. This study considers Roots blower to implement PLIF technique because it provides relatively easy optical access. Besides, it is a good representative of PDMs. Selection criteria of optical glass, suitable tracer particles, Imaging camera, optical lenses and filters are investigated in detail. Pixel Intensity was found to be conformable in the clearance gap from recorded images of temperature field, thereby confirmed the efficacy of the flow visualization and instrumentation systems developed.

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Pages: 8

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Details

  • Original title: Development of state-of-the-art experimental technique to investigate temperature field in leakage flows of positive displacement machines.
  • Record ID : 30028405
  • Languages: English
  • Subject: Technology
  • Source: 2021 Purdue Conferences. 25th International Compressor Engineering Conference at Purdue.
  • Publication date: 2021/05
  • Document available for consultation in the library of the IIR headquarters only.

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