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논문 기본 정보

자료유형
학술저널
저자정보
Yanbin Liu (Academy of Armored Force Engineering) Weilin Zhuge (Tsinghua University) Yangjun Zhang (Tsinghua University) Shuyong Zhang (National Key Laboratory of Diesel Engine Turbocharging Technology)
저널정보
한국유체기계학회 International Journal of Fluid Machinery and Systems International Journal of Fluid Machinery and Systems Vol.11 No.4
발행연도
2018.12
수록면
432 - 441 (10page)
DOI
10.5293/IJFMS.2018.11.4.432

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초록· 키워드

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Turbocharging is an important way to raise engine power density, save energy and reduce emission. Because turbocharger is driven by exhaust gas, energy utilization rate is a key factor for turbocharged engine performance. As a part transferring heat to mechanical energy, turbine efficiency decides exhaust gas energy utilization. Because of three-dimensional flow field distortion effect at outlet to exhaust manifold, turbine efficiency will be different from MAP when engine working. Influences by interaction in turbine system, turbine efficiency will decrease. So in order to evaluate turbine operating performance and design or select turbine more precisely, it is necessary to build a through-flow model for turbine which can consider three-dimensional flow field distortion effect.
Unsteady flow field distortion at outlet to turbine was analyzed and flow field interaction law between exhaust manifold and turbine was studied. On the basis, six typical flow field distortion models in an engine operation cycle were raised. Then influences six models on each flow stage in turbine were analyzed. Further, models for exhaust manifold and turbine were built separately. Difference between unsteady three-dimensional simulation result and that based on turbine system through-flow model was compared and analyzed. Research result illustrated that difference of turbine cycle efficiency was only 0.1% and difference of turbine cycle work was 0.3%. So it can be deduced that turbine system through-flow model can predict turbine operation performance precisely and help turbine system matching exactly.
#Engine #Turbine system #Through-flow model #Flow interaction #Distortion model #Flow loss model

목차

Abstract
1. Introduction
2. Analysis of flow distortion and influence law
3. Study of through-flow model for turbine system
4. Conclusion
References

참고문헌 (11)

참고문헌 신청
[단행본] - Nicholas C. Baines / / Fundamentals of Turbocharging / Concepts NREC google schola [기타자료] - Ricardo / 2010 / 2-Stage Turbocharger Matching for a Light Duty Diesel Engine / Josef Božek Research Center google schola [학위논문] - Byungchan Lee / 2009 / Dual-Stage Boosting Systems: Modeling of Configurations, Matching and Boost Control Options / University of Michigan google schola [보고서] - Yituan He / 2007 / Study on modulated two-stage turbocharging system for vehicle diesel engine google schola [기타자료] - Teng Cao / / A Low Order Model for Predicting Turbocharger Turbine Unsteady Performance / GT2014-25913 google schola

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