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Analysis of In-Cylinder Turbulent Air Motion Dependence on Engine Speed
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Abstract
In-cylinder cycle-resolved LDV measurements have been made in a diesel engine having a high-squish re-entrant combustion chamber with compression ratio of 21:1. The engine has been motored in the range of 1000 to 3000 rpm thanks to the use of self-lubricating seeding particles. Conventional ensemble-averaging and filtering techniques have been used for analyzing instantaneous velocity data obtained at two points along a diameter located in a horizontal plane at 5 mm below the engine head. The dependence of the mean motion and turbulence on engine speed has been evaluated. The effect of cut-off frequency selection on turbulence values has been also analyzed. Moreover, the Kolmogorov's -5/3 power domain has been investigated in detail by spectral analysis on the instantaneous velocity data.
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Citation
Corcione, F. and Valentino, G., "Analysis of In-Cylinder Turbulent Air Motion Dependence on Engine Speed," SAE Technical Paper 940284, 1994, https://doi.org/10.4271/940284.Also In
References
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