Experimental investigation of piston heat transfer under conventional diesel and reactivity-controlled compression ignition combustion regimes

Abstract

The piston of a heavy-duty single-cylinder research engine was instrumented with 11 fast-response surface thermocouples, and a commercial wireless telemetry system was used to transmit the signals from the moving piston. The raw thermocouple data were processed using an inverse heat conduction method that included Tikhonov regularization to recover transient heat flux. By applying symmetry, the data were compiled to provide time-resolved spatial maps of the piston heat flux and surface temperature. A detailed comparison was made between conventional diesel combustion and reactivity-controlled compression ignition combustion operations at matched conditions of load, speed, boost pressure, and combustion phasing. The integrated piston heat transfer was found to be 24% lower, and the mean surface temperature was 25 °C lower for reactivity-controlled compression ignition operation as compared to conventional diesel combustion, in spite of the higher peak heat release rate. Lower integrated piston heat transfer for reactivity-controlled compression ignition was found over all the operating conditions tested. The results showed that increasing speed decreased the integrated heat transfer for conventional diesel combustion and reactivity-controlled compression ignition. The effect of the start of injection timing was found to strongly influence conventional diesel combustion heat flux, but had a negligible effect on reactivity-controlled compression ignition heat flux, even in the limit of near top dead center high-reactivity fuel injection timings. These results suggest that the role of the high-reactivity fuel injection does not significantly affect the thermal environment even though it is important for controlling the ignition timing and heat release rate shape. The integrated heat transfer and the dynamic surface heat flux were found to be insensitive to changes in boost pressure for both conventional diesel combustion and reactivity-controlled compression ignition. However, for reactivity-controlled compression ignition, the mean surface temperature increased with changes in boost suggesting that equivalence ratio affects steady-state heat transfer.

Keywords

Piston temperature heat flux thermocouples reactivity-controlled compression ignition wireless telemetry

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References

Kalghatgi

Hildingsson

Johansson

. Low NO_x and low smoke operation of a diesel engine using gasoline-like fuels. J Eng Gas Turb Power 2009; 132(9): 092803.

Najt

Foster

. Compression-ignited homogeneous charge combustion. SAE paper 830264, 1983.

Glewen

Heuwetter

Foster

Andrie

Krieger

. Analysis of deviations from steady state performance during transient operation of a light duty diesel engine. SAE Int J Eng 2012; 5(3): 909–922.

Shibata

Urushihara

. Auto-ignition characteristics of hydrocarbons and development of HCCI fuel index. SAE paper 2007-01-0220, 2007.

Hanson

Kokjohn

Splitter

Reitz

. Fuel effects on reactivity controlled compression ignition (RCCI) combustion at low load. SAE Int J Eng 2011; 4(1): 394–411.

Splitter

Hanson

Reitz

. High efficiency, low emissions RCCI combustion by use of a fuel additive. SAE Int J Fuel Lubr 2010; 3(2): 742–756.

Splitter

Hanson

Kokjohn

Reitz

. Reactivity controlled compression ignition (RCCI) heavy-duty engine operation at mid- and high-loads with conventional and alternative fuels. SAE paper 2011-01-0363, 2011.

Kokjohn

Hanson

Splitter

Reitz

. Fuel reactivity controlled compression ignition (RCCI): a pathway to controlled high-efficiency clean combustion. Int J Eng Res 2011; 12(3): 209–226.

Dempsey

Reitz

. Computational optimization of reactivity controlled compression ignition in a heavy-duty engine with ultra low compression ratio. SAE paper 2011-24-0015, 2011.

10.

Kokjohn

Hanson

Splitter

Kaddatz

Reitz

. Fuel reactivity controlled compression ignition (RCCI) combustion in light- and heavy-duty engines. SAE Int J Eng 2011; 4(1): 360–374.

11.

Grandin

Denbratt

Bood

Brackmann

Bengtsson

P-E

. The effect of knock on the heat transfer in an SI engine: thermal boundary layer investigation using CARS temperature measurements and heat flux measurements. SAE paper 2000-01-2831, 2000.

12.

Chang

Güralp

Filipi

Assanis

. New heat transfer correlation for an HCCI engine derived from measurements of instantaneous surface heat flux. SAE paper 2004-01-2996, 2004.

13.

Woschni

. Universally applicable equation for the instantaneous heat transfer coefficient in the internal combustion engine. SAE paper 670931, 1967.

14.

Kokjohn

Reitz

Splitter

Musculus

. Investigation of fuel reactivity stratification for controlling PCI heat-release rates using high-speed chemiluminescence imaging and fuel tracer fluorescence. SAE Int J Eng 2012; 5(2): 248–269.

15.

Bai

Vressner

Hultqvist

. Effect of turbulence on HCCI combustion. SAE paper 2007-01-0183, 2007.

16.

Enomoto

Furuhama

. Study on thin film thermocouples for measuring instantaneous temperature on surface of combustion chamber wall in internal combustion engine. Bull JSME 1985; 52(474): 680–687.

17.

LeFeurve

Myers

Uyehara

. Experimental instantaneous heat fluxes in a diesel engine and their correlation. SAE paper 690464, 1969.

18.

Overbye

Bennethum

Uyehara

Myers

. Unsteady heat transfer in engines. SAE paper 610041; SAE Trans 1961; 69: 461–494.

19.

Alkidas

. Heat transfer characteristics of a spark-ignition engine. T ASME: J Heat Trans 1980; 102: 189–193.

20.

Oude Nijeweme

Kok

JBW

Stone

Wyszynski

. Unsteady in-cylinder heat transfer in a spark-ignition engine: experiments and modeling. Proc IMechE, Part D: J Automobile Engineering 2001; 215: 747–760.

21.

Furuhama

Tada

Nakamura

. Some measurements of the piston temperature in a small type gasoline engine. Bull JSME 1964; 7(26): 422–429.

22.

Guralp

. Development and applications of a telemetry system for piston surface temperature measurement in a homogeneous charge compression ignition engine. MS Thesis, University of Michigan, Ann Arbor, MI, 2004.

23.

Furuhama

Enomoto

. Piston temperature of automobile gasoline engine in driving on the road. Bull JSME 1973; 16(99): 1385–1398.

24.

Assanis

Friedman

. A telemetry linkage system for piston temperature measurements in a diesel engine. SAE paper 910299, 1991.

25.

Hendricks

. Instantaneous heat flux measurements in internal combustion engines. PhD Dissertation, University of Wisconsin–Madison, Madison, WI, 2011.

26.

Miers

Anderson

Blough

Inal

. Impingement identification in a high speed diesel engine using piston surface temperature measurements. SAE paper 2005-01-1909, 2005.

27.

Weingartz

Anderson

Miers

. Determination of heat transfer augmentation due to fuel spray impingement in a high-speed diesel engine. SAE paper 2009-01-0843, 2009.

28.

Lee

Kauh

. Development of a multipiston temperature telemetry system using Bluetooth networks. Proc IMechE, Part D: J Automobile Engineering 2009; 220(2): 127–138.

29.

Barna

Brumm

Anderson

. An infrared telemetry technique for making piston temperature measurements. SAE paper 910051, 1991.

30.

IR Telemetrics. http://www.irtelemetrics.com/ (accessed 21 October 2012).

31.

Hendricks

Brossman

Ghandhi

. Instantaneous local heat flux measurements in a small utility engine. ASME paper ICES2009-76035, 2009.

32.

Lawton

. Effect of compression and expansion on instantaneous heat transfer in reciprocating internal combustion engines. Proc IMechE, Part A: J Power and Energy 1987; 201(3): 175–186.

33.

Beck

Blackwell

St Clair

. Inverse heat conduction: ill-posed problems. Hoboken, NJ: Wiley-Interscience, 1988.

34.

Walker

Scott

. One dimensional heat flux history estimation from discrete temperature measurements. Proc ASME Heat Trans Div 1995; 317(1): 175–181.

35.

Walker

Scott

. Evaluation of estimation methods for high unsteady heat fluxes from surface measurements. J Therm Heat Trans 1998; 12(4): 543–550.

36.

Hendricks

Ghandhi

. Estimation of surface heat flux in IC engines using temperature measurements: processing code effects. SAE Int J Eng 2012; 5(3): 1268–1285.

37.

Heywood

. Internal combustion engine fundamentals. New York: McGraw-Hill, Inc, 1988.

38.

Kar

Cheng

. Speciated engine-out organic gas emissions from a PFI-SI engine operating on ethanol/gasoline mixtures. SAE Int J Fuel Lubr 2010; 2(2): 91–101.

39.

Gatowski

Balles

Chun

Nelson

Ekchian

Heywood

. Heat release analysis of engine pressure data. SAE paper 841359, 1984.

40.

Medtherm Corporation. Coaxial surface thermocouple probes (Bulletin 500). Huntsville, AL: Medtherm Corporation, 2006.

41.

Chauvenet

. A manual of spherical and practical astronomy, vol. II (1st ed. 1863; Reprint of 18915th ed.). New York: Dover, 1960.

42.

Peirce

. Criterion for the rejection of doubtful observations. Astron J II 1852; 45: 161–163.

43.

Tikhonov

Aresenin

. Solutions of ill-posed problems. Washington, DC: V.H. Winston & Sons, 1977.

44.

Okabe

Boots

Sugihara

. Spatial tessellations: concepts and applications of Voronoi diagrams. New York: Wiley, 1992.

45.

Sibson

. A brief description of natural neighbor interpolation. In: Barnett

(ed.) Interpreting multivariate data. Chichester: John Wiley & Sons, 1981, pp.21–36.

46.

Splitter

Wissink

Hendricks

Ghandhi

Reitz

. Comparison of RCCI, HCCI, and CDC operation from low to full load. In: THIESEL 2012 conference on thermo- and fluid dynamic processes in direct injection engines, Valencia, 11–14 September 2012. Madison, WI: Engine Research Center, University of Wisconsin–Madison.

47.

Splitter

Hanson

Kokjohn

Wissink

Reitz

. Injection effects in low load RCCI dual-fuel combustion. SAE paper 2011-24-0047, 2011.