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Effect of Height Variation of Recirculating Casing Treatment on the Performance of a Turbocharger Compressor

재순환케이싱처리 높이변화가 터보차저 압축기의 성능에 미치는 영향

  • Received : 2015.02.08
  • Accepted : 2015.06.09
  • Published : 2015.08.01

Abstract

In this study, we investigate the performance variations of an automotive turbocharger compressor with respect to the height variation of the recirculating casing treatment (RCT). We use three RCT heights, namely 1.2 mm, 1.5 mm, and 1.8 mm. We vary the compressor speed from 90,000 to 150,000 rpm, and the flow rate from 0.015 kg/s to 0.08 kg/s. The calculation results of the total pressure ratio and isentropic efficiency showed good agreement with the performance data provided by the manufacturer within a 0.7 percent error. The results showed that the RCT heights of 1.2 mm, 1.8 mm, and 1.5 mm, in that order, exhibited a more uniform pressure distribution, higher pressure ratio, and wider operational range. As the number of revolutions per minute increased, we obtained typical characteristics of a compressor map having a narrower operational range in the region of higher pressure ratio.

자동차용 터보차저 원심압축기의 재순환케이싱처리(RCT)부의 높이변화가 압축기의 성능에 미치는 영향이 조사되었다. 연구대상 RCT 부의 높이는 1.2mm, 1.5mm, 1.8mm 의 세가지이며, 회전수 범위는 90,000 - 150,000 rpm, 유량 범위는 0.015 kg/s - 0.08 kg/s 이다. 전압력비와 등엔트로피 효율 비교 결과, 본 수치계산은 실제압축기의 성능 제원과 최대오차 0.7%의 범위 내에서 잘 일치하였다. 해석결과, RCT 부 높이 1.2mm, 1.8mm, 1.5mm 순서로 균일 압력분포, 높은 압력비, 넓은 작동범위를 얻었다. 이들 세가지 경우 모두, 회전수가 증가할수록 이들의 압력비는 높아지나 운전범위는 좁아지는 전형적인 압축기 맵의 특성을 보여주었다.

Keywords

References

  1. Japikse, D., 1996, Centrifugal Compressor Design and Performance, Concepts, Inc.
  2. Cheng, X. and Michael, M., 2005, "Development and Design of a Centrifugal Compressor Volute," Int. J. of Rotating Machinery, Vol. 3, pp. 190-196.
  3. Ayder, E., Van den Braembussche, R. and Brasz, J. J., 1993, "Experimental and Theoretical Analysis of the Flow in a Centrifugal Compressor Volute," ASME J. Turbomach., Vol. 115, No. 6, pp. 582-589. https://doi.org/10.1115/1.2929293
  4. Yin, J., 2009, "Optimization of Turbocharger Ported Shroud Compressor Stages," Proceeding of ASME Turbo Expo 2009: Power for Land, Sea and Air, GT2009-59248.
  5. Park, C. Y., Choi, Y. S., Lee, K. Y. and Yoon, J. Y., 2012, "Numerical Study on the Range Enhancement of a Centrifugal Compressor with a Ring Groove System," J. of Mech. Sci. & Tech., Vol. 26, No. 5, pp. 1371-1378. https://doi.org/10.1007/s12206-012-0320-z