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Abstract

Instantaneous heat flux at the surface of a cylinder head in a motored diesel engine has been measured, at various speeds, using a fast-response surface thermocouple. Heat flux during compression was found to be much larger than heat flux during expansion, the maximum heat flux occurred about 8° before top dead centre and there was a significant heat flux even when gas temperature and wall temperature were equal. During expansion, heat flowed from the surface to the gas even though the bulk gas temperature was greater than the surface temperature. These effects are predicted by solutions of the equation of thermal energy and are shown to be related to the volumetric rate of compression or expansion. A simple modification of Annand's equation gives good results and is recommended for general cycle calculations.

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References

Eichelberg

Some new investigations on old combustion engine problems. Engng, Lond., 1939, 148, 463 and 547.

Nusselt

Die Wärmeübergang in den Verbrennungskraftmaschinen. Z. Ver. dt. Ing., 1923, 67, 692 and 708.

Elser

Instationäre Wärmeübergang bei periodisch adiabater verdichtung turbulenter gase. Forsch. Ing. Westf., 1955, 121, 65.

Overbye

V. D.

Bennethum

J. E.

Uyehara

O. A.

Myers

P. S.

Unsteady heat transfer in engines. Trans. Soc. Automot. Engrs, NY, 1961, 69, 461.

Pflaum

Wärmeübergang bei dieselmaschinen mit und ohne aufladung. MTZ, 1961, 22, 70.

Annand

W. J. D.

Heat transfer in the cylinders of reciprocating internal combustion engines. Proc. Instn Mech. Engrs, 1963, 177(36), 973–990.

Woschni

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

Whitehouse

N. D.

Heat transfer in a quiescent chamber diesel engine. Proc. Instn Mech. Engrs, 1970–1, 185(72/71), 963–975.

Annand

W. J. D.

T. H.

Instantaneous heat transfer rates to the cylinder head surface of a small compression-ignition engine. Proc. Instn Mech. Engrs, 1970–1, 185(72/71), 976–987.

10.

Hassan

Unsteady heat transfer in a motored IC engine cylinder. Proc. Instn Mech. Engrs, 1970–1, 185(80/71), 1139–1148.

11.

Grasso

Evaluation of Annand's formulae for heat transfer: calculations in i.c. engines, 1983, pp. 49–52 (La Termotecnica, Gennaio).

12.

Rao

V. K.

Bardon

M. F.

Convective heat transfer in reciprocating engines. Proc. Instn Mech. Engrs, Part D, 1985, 199(D3), 221–226.

13.

Enomoto

Furuhama

Minakami

Heat loss to combustion chamber wall of 4-stroke gasoline engine. Bull. JSME, 1985, 28(238), 647–655.

14.

Lawton

Bore temperature and heat flux in a 40 mm gun barrel. Conference on Interior ballistics of guns, 1985, Proceedings 392, pp. 10–1, 10–12 (AGARD).

15.

Smith

G. D.

Numerical solution of partial differential equations: finite difference methods, 2nd edition, 1978 (Clarendon Press, Oxford).

16.

Bird

R. B.

Stewart

W. E.

Lightfoot

E. N.

Transport phenomena, 1960 (Wiley).

17.

Lyford-Pike

Heywood

J. B.

Thermal boundary layer thickness in the cylinder of a spark ignition engine. Int. J. Heat Mass Transfer, 1984, 27(10), 1873–1878.

Effect of Compression and Expansion on Instantaneous Heat Transfer in Reciprocating Internal Combustion Engines

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