Journal ArticleDOI
Effect of Compression and Expansion on Instantaneous Heat Transfer in Reciprocating Internal Combustion Engines
B Lawton
- Vol. 201, Iss: 3, pp 175-186
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TLDR
In this article, the surface heat flux at the surface of a cylinder head in a motored diesel engine was measured at various speeds using a fast-response surface thermocouple.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 w...read more
Citations
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Journal ArticleDOI
Parametric studies and optimisation of pumped thermal electricity storage
TL;DR: In this paper, a thermodynamic analysis is presented based on traditional cycle calculations coupled with a Schumann-style model of the packed beds, and results of an optimisation study are then given in the form of trade-off surfaces for roundtrip efficiency, energy density and power density.
Journal ArticleDOI
Critical evaluation of current heat transfer models used in CFD in-cylinder engine simulations and establishment of a comprehensive wall-function formulation
TL;DR: In this article, four of the most popular heat transfer formulations used in commercial and research CFD (computational fluid dynamics) codes are evaluated against available experimental data, using an in-house CFD model that has already been applied satisfactorily for the simulation of a spark-ignition and a diesel engine running under motoring conditions.
Journal ArticleDOI
Progress and prospects of thermo-mechanical energy storage—a critical review
Andreas V. Olympios,Joshua D. McTigue,Pau Farres-Antunez,Alessio Tafone,Alessandro Romagnoli,Yongliang Li,Yulong Ding,Wolf-Dieter Steinmann,Liang Wang,Haisheng Chen,Christos N. Markides +10 more
TL;DR: In this article, a review of the thermodynamic principles upon which these thermo-mechanical energy storage (TMES) technologies are based are discussed and a synopsis of recent progress in their development is presented, assessing their ability to provide reliable and cost-effective solutions.
Journal ArticleDOI
Local heat flux measurements in a hydrogen and methane spark ignition engine with a thermopile sensor
TL;DR: In this article, an experimental investigation of heat transfer inside a CFR spark ignition engine operated at a constant engine speed of 600 rpm is described. The heat flux is directly measured under motored and fired conditions with a commercially available thermopile sensor.
Journal ArticleDOI
A modified thermal wall function for the estimation of gas-to-wall heat fluxes in CFD in-cylinder simulations of high performance spark-ignition engines
TL;DR: In this paper, an alternative heat transfer model is proposed by the authors and tested on current production high specific power DISI turbocharged engines operated at full load and high revving speed, as demonstrated by their application to the well-known GM pancake engine test case.
References
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Proceedings ArticleDOI
A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine
Journal ArticleDOI
Second Paper: Instantaneous Heat Transfer Rates to the Cylinder Head Surface of a Small Compression-Ignition Engine:
W. J. D. Annand,T. H. Ma +1 more
TL;DR: In this article, measurements of instantaneous heat transfer rates from the working fluid to the cylinder head of a small open-chamber, four-stroke, compressionignition engine have been made at five points on the surface, using a new form of thin-film thermocouple.
Journal ArticleDOI
Thermal boundary layer thickness in the cylinder of a spark-ignition engine
TL;DR: In this paper, the thickness of the thermal boundary layers in the cylinder of a spark-ignition engine was measured throughout the complete operating cycle, and the results showed that the layers on the cylinder wall reached a maximum thickness of about 2 mm at the end of expansion.