Efficiency of heat emission intensification in ring finned tracts of cooling of combustion chambers

The efficiency of heat emission intensification in ring finned tracts according to the criterion of maximum heat removal is considered. The known technique is used for solving equations of mathematical model of the heat-exchange device in the dimensionless form with respect to the case of a smooth ring channel. The constancy of the internal tube diameter, object length, coolant properties, and temperature fall between the wall and coolant are assumed as the restriction conditions of the problem. The dependence of the efficiency of heat emission intensification both on thermal-hydraulic characteristics of these tracts and on parameters of their finning (in the form of the correction coefficient for the finning factor) is found. The influence of the channel height, the finning pitch and the Bio number on the efficiency of heat emission intensification is evaluated in the analytical-computational way. The ranges of optimal values for these parameters are found according to the maximum value of the correction coefficient for the finning factor.

References

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