Abstract
This study presents a finite element heat-transfer model for the prediction of piston temperature distributions in a real time operation engine. The thermal boundary conditions are specified adequately in the model for various operations. The time-mean, area-averaged gas temperature and heat transfer coefficient could be obtained from the engine simulation. The ambient tremperatures along piston ring belt and skirt were estimated with a formula and the corresponding heat transfer coefficients were evaluated through equivalent thermal circuit analysis.
The model is also calibrated and the predicted and measured temperatures compared for the operating engine. The predictions are reasonable, providing confidence in the use of the simulation model.
Zusammenfassung
Diese Untersuchung stellt ein Finite-Elemente-Wärmeübertragungsmodell für die Berechnung der Temperaturverteilung eines Kolbens in einem Verbrennungsmotor vor. Die thermischen Randbedingungen wurden in diesem Model für verschiedene Arbeitsbedingungen aufgestellt. Die mittlere Gastemperatur und der Wärmeübergangskoeffizient wurden durch eine Simulation des Motors erhalten. Die Temperaturen entlang des Kolbenringes und des Kolbenrandes wurden mit einer Formel berechnet. Die entsprechenden Wärmeübergangskoeffzienten wurden durch eine äquivalente thermische Kreislaufanalyse erhalten. Das Modell wurde kalibriert und die berechneten Temperaturen des Verbrennungsmotors mit den gemessenen verglichen. Es wurde festgestellt, daß die Berechnungen vernünftig waren und somit das Simulationsmodell gut geeignet ist.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Abbreviations
- A :
-
area
- [H]:
-
heat convection matrix contributed by convection on the surface
- h :
-
heat transfer coefficient
- K :
-
thermal conductivity
- [K]:
-
heat conduction matrix
- l r ,l z :
-
direction cosines of a line
- M :
-
mass
- P :
-
gas pressure in cylinder
- {p}:
-
a vector of applied heat flow on the surface
- s :
-
the length of edge
- T :
-
temperature
- {T}:
-
a vector of temperature at grid points
- T p :
-
piston temperature calculated by cycle simulation
- T* p :
-
area-average piston crown temperature computed by finite element model
- r, z :
-
radial and axial direction
- X :
-
the length of heat transfer path
- θ :
-
crank angle
- -:
-
mean w.r.t. time
- amb :
-
ambient side
- E :
-
total number of element
- e :
-
elemente
- F :
-
fuel
- g :
-
gas
References
Pachornegg, S. J.: Heat flow in engine piston. SAE, 1967, paper No. 670928
Kruggel, O.: Calculation and measuring of piston temperatures of air-cooled two-stroke gasoline engine. SAE, 1971, paper No. 710578
Annand, W. J. D.; Ma, T. H.: Instantaneous heat transfer rates to the cylinder head surface of small compression-ignition engine. Proc. 1970–71, Instn. Mech. Engr. Vol. 185, 72/71
Tzoref, J.; Stotter, A.; Zvirin, Y.: Dynamic response of the temperature and stress fields in an I.C. engine piston. Int. J. Mech. Sci. 20 (1978) 581–592
Procknow, D. W.: Calculation and measurement of piston temperatures in a water-cooled two-stroke cycle gasoline engine. M.S. Thesis, M.E. Department, University of Wisconsin, Madison, 1978
Takahisa Hasebe et al.: Thermal measurement and analysis of engine components — part I, measurement and analysis of piston. Transaction of the Society of Automotive Engineers of Japan, 1983, No. 27, 55
Li, C. H.: Thermoelastic behavior of an aluminium diesel engine piston. SAE, 1986, paper No. 860163
Wallace, F. J.; et al.: Thermal barrier pistons and their effect on the performance of compound diesel engine cycles. SAE, 1983, paper No. 830312
Chiu, C. P.; Wu, H. W.; Ju, C. T.: Numerical solution for piston temperature distribution in a gasoline engine. Proc. of 4th Int. Conference in Applied Numerical Modeling, 1984, December, p. 62
Borman, G. L.; Myers, P. S.; Uyehara, O. A.: Engine simulation studies. Technical Report No. 11398, the Univ. of Wisconsin, March, 1972
Saugerud, O. T.; Saudsmark, N.: Strength analysis of thermal loaded engine components by two-dimensional and three-dimensional finite element model. SAE, 1979, paper No. 790820
Annand, W. J. D.: Heat transfer in the cylinders of reciprocating internal combustion engines. Proc. Inst. Mech. Engr. 1963, Vol. 177, No. 36, p. 973
Baker, A. J.: Finite Element Computational Fluid Mechanics. Hemisphere 1983
Incropera, F. P.; DeWitt, D. P.: Fundamentals of Heat Transfer. New York, Wiley & Sons 1981
Wu, H. W.; Chiu, C. P.: A Study of temperature distribution in a diesel piston — Comparison of analytical and experimental results. SAE, 1986, paper No. 861278
Monaghan, M. L.: Thermal stresses in the doxford piston. B.S.R.A., 1964, Report Ns. 53
Krieger, R.B.; Borman, G. L.: The computation of apparent heat release for internal combustion engines. ASME, 1966, paper 66-WA/DGP-4
Toshio, T.; Shoichi, F.: On the heat flow from the pistons in a farm type gasoline engine. Bulletin of JSME 7 (1964) No. 28
Woschni G.; Fieger, J.: Determination of local heat transfer coefficient at the piston of a high speed diesel engine by evaluation of measured temperature distribution. SAE, 1979, paper No. 790834
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Wu, H.W., Chiu, C.P. Computer diagnosis system for thermal analysis of engine piston. Wärme- und Stoffübertragung 24, 203–210 (1989). https://doi.org/10.1007/BF01625496
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01625496