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The Prediction of Heat and Mass Transfer During Compression and Expansion in I.C. Engines
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Abstract
The mathematical equations describing the momentum, energy and mass exchanges in non-firing engine cylinders are described and solved. Attention is confined to laminar flow in axi-symmetric cylinders. Pressure development and velocity prediction, for plane cylindrical combustion chambers, compare favourably with experimental measurements for compression] and expansion in motored engines. At engine speeds less than 100 rev/min the piston motion induces a toroidal vortex during compression whose direction is not reversed on expansion. Conductive heat transfer at higher engine speeds, 600-1000 rev/min, adequately describes the gas-wall heat-transfer. Flow patterns are also predicted for a diesel-type bowl in piston configuration.
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Chong, M., Milkins, E., and Watson, H., "The Prediction of Heat and Mass Transfer During Compression and Expansion in I.C. Engines," SAE Technical Paper 760761, 1976, https://doi.org/10.4271/760761.Also In
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