Research Papers: Gas Turbines: Turbomachinery

Steady State Engine Test Demonstration of Performance Improvement With an Advanced Turbocharger

[+] Author and Article Information
Harold Sun

ASME Member
Ford Motor Company,
2101 Village Road,
Dearborn, MI 48121
e-mail: hsun3@ford.com

Dave Hanna

Ford Motor Company,
2101 Village Road,
Dearborn, MI 48121
e-mail: dhanna@ford.com

Liangjun Hu

Ford Motor Company,
2101 Village Road,
Dearborn, MI 48121
e-mail: lhu4@ford.com

Eric Curtis

Ford Motor Company,
2101 Village Road,
Dearborn, MI 48121
e-mail: ecurtis@ford.com

James Yi

Ford Motor Company,
2101 Village Road,
Dearborn, MI 48121
e-mail: jyi1@ford.com

Jimi Tjong

Ford Motor Company,
1 Quality Way,
Windsor N9A 6X3, Canada
e-mail: jtjong@ford.com

1Corresponding author.

Contributed by the Turbomachinery Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received January 10, 2014; final manuscript received January 24, 2014; published online February 20, 2014. Editor: David Wisler.

J. Eng. Gas Turbines Power 136(7), 072601 (Feb 20, 2014) (7 pages) Paper No: GTP-14-1017; doi: 10.1115/1.4026611 History: Received January 10, 2014; Revised January 24, 2014

Heavy EGR required on diesel engines for future emission regulation compliance has posed a big challenge to conventional turbocharger technology for high efficiency and wide operation range. This study, as part of the U.S. Department of Energy sponsored research program, is focused on advanced turbocharger technologies that can improve turbocharger efficiency on customer driving cycles while extending the operation range significantly, compared to a production turbocharger. The production turbocharger for a medium-duty truck application was selected as a donor turbo. Design optimizations were focused on the compressor impeller and turbine wheel. On the compressor side, advanced impeller design with arbitrary surface can improve the efficiency and surge margin at the low end while extending the flow capacity, while a so-called active casing treatment can provide additional operation range extension without compromising compressor efficiency. On the turbine side, mixed flow turbine technology was revisited with renewed interest due to its performance characteristics, i.e., high efficiency at low-speed ratio, relative to the base conventional radial flow turbine, which is relevant to heavy EGR operation for future diesel applications. The engine dynamometer test shows that the advanced turbocharger technology enables over 3% BSFC improvement at part-load as well as full-load condition, in addition to an increase in rated power. The performance improvement demonstrated on an engine dynamometer seems to be more than what would typically be translated from the turbocharger flow bench data, indicating that mixed flow turbine may provide additional performance benefits under pulsed exhaust flow on an internal combustion engine and in the low-speed ratio areas that are typically not covered by steady state flow bench tests.

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Zellbeck, H., Ross, T., and Guhr, C., 2008, “New Methods for Proper Boosting Systems,” 29th International Vienna Motor Symposium, Vienna, Austria, April 24–25.
Nitta, J., Minato, A., and Shimazaki, N., 2011, “Performance Evaluation of Three-Stage Turbocharging System for Heavy-Duty Diesel Engine,” SAE Technical Paper No. 2011-01-0374. [CrossRef]
Uchida, H., Kashimoto, A., and Iwakiri, Y., 2006, “Development of Wide Flow Range Compressor With Variable Inlet Guide Vane,” R&D Review of Toyota CRDL, 41(3), pp. 9–14.
Fraser, N., Fleischer, T., and Thornton, J., 2007, “Development of a Fully Variable Compressor Map Enhancer for Automotive Application,” SAE Technical Paper No. 2007-01-1558. [CrossRef]
Mohtar, H., Chesse, P., Yammine, A., and Hetet, J. F., 2008, “Variable Inlet Guide Vanes in a Turbocharger Centrifugal Compressor: Local and Global Study,” SAE Technical Paper No. 2008-01-0301. [CrossRef]
Nikpour, B., 2004, “Turbocharger Compressor Flow Range Improvement for Future Heavy Duty Diesel Engines,” THIESEL 2004 Conference on Thermo- and Fluid Dynamic Processes in Diesel Engines, Valencia, Spain, September 7–10.
Fisher, F. B., 1988, “Application of Map Width Enhancement Devices to Turbocharger Compressor Stages,” SAE Technical Paper No. 880794. [CrossRef]
Yamaguchi, S., Yamaguchi, H., Goto, S., Hakao, H., and Nakamura, F., “The Development of Effective Casing Treatment for Turbocharger Compressors,” IMechE Seventh International Conference on Turbochargers and Turbocharging, London, May 17–18, pp. 23–32, Paper No. C602/008/2002.
Sakaguchi, D., Nagoshi, K., Tanimura, M., Ishida, M., and Ueki, H., 2010, “Effect of Guide Vane in Ring Groove Arrangement for a Small Turbocharger,” 10th Asian International Conference on Fluid Machinery, Kuala Lumpur, Malaysia, October 21–23, Vol. 1225, American Institute of Physics, Melville, NY, pp. 47–54. [CrossRef]
Barton, M. T., Mansour, M. L., Liu, J. S., and Palmer, D. L., 2004, “Numerical Optimization of a Vaned Shroud Design for Increased Operability Margin in Modern Centrifugal Compressors,” ASME Turbo Expo, Vienna, Austria, June 14–17, ASME Paper No. GT2004-54287. [CrossRef]
Sivagnanasundaram, S., Spence, S., Early, J., and Nikpour, B., 2010, “Investigation of Compressor Map Width Enhancement and the Inducer Flow Field Using a Shroud Bleed Slot,” IMechE 9th International Conference on Turbochargers and Turbocharging, London, May 19–20, pp. 147–160. [CrossRef]
Sun, H., Hu, L., Zhang, J., Hanna, D., Krivitzky, E., Larosiliere, L., Lai, M-C., Yang, C., 2014, “Switchable Dual-Port Casing Treatment Scheme for Enhanced Turbocharger Compressor Operating Range,” IMechE, Journal of Automobile Engineering, 228(3), pp. 235–244. [CrossRef]
Watson, N., and Janota, R. S., 1982, Turbocharging the Internal Combustion Engine, MacMillan, London.
Wallace, F. J., 1971, “A Systematic Approach to the Design of Radial Inflow and Mixed Flow Turbines,” NACA Report No. CP 1180.
Luddecke, B., Filsinger, D., and Ehrhard, J., 2012, “On Mixed Flow Turbines for Automotive Turbocharger Applications,” Int. J. Rotating Mach., 2012, p. 589720. [CrossRef]
Sun, H., Hanna, D., Zhang, J., Hu, L., Krivitzky, E. M., Larosiliere, L. M., and Baines, N. C., 2011, “Turbocharger,” U.S. Patent No. 2011/0173975 A1.


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Fig. 1

Compressor and turbine wheels are redesigned and optimized to fit into a production (donor) turbocharger

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Fig. 2

Flow field CFD visualization inside a compressor impeller with (a) and without choke slot (b) when it operates near choke condition; mechanism of active casing treatment (c)

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Fig. 3

Steady state flow bench test of advanced compressor with ACT (only the last three speed lines marked the choke slot switch points, and the surge slot remains open) versus base compressor

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Fig. 5

Comparison of steady state flow bench test: the new advanced mixed flow turbine versus radial flow donor turbine

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Fig. 4

Turbine speed ratio U/C varies during one cycle of a four stroke 6.7 l V8 diesel engine (GTPower simulation)

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Fig. 7

Comparison of steady state full load engine performance: the new advanced turbocharger versus conventional donor turbocharger

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Fig. 6

Part load steady state engine performances at 3 bar BMEP@1250 rpm: new advanced turbo versus donor turbo



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