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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part D. Journal of Automobile Engineering >Subcooled boiling heat transfer modelling for internal combustion engine applications
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Subcooled boiling heat transfer modelling for internal combustion engine applications

机译：用于内燃机的过冷沸腾传热模型

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摘要

Any boiling-based strategy in developing cooling systems of internal combustion (IC) engines requires an accurate prediction of coolant-side heat transfer. The computational fluid dynamics (CFD) simulation incorporating subcooled boiling models is an effective approach for such analyses. However, most of the existing models are developed in some special flow and boiling conditions differing from that in IC engines, which inevitably leads to great discrepancies when they are directly applied to CFD analyses inside IC engine cooling galleries. A modified model with adjustable parameters is proposed based on the division description method in this paper. The predicted heat fluxes by different boiling models are compared against experimental data obtained in a cooling gallery simulator passage. The results indicate that a higher precision can be obtained by the modified model in predicting the boiling heat flux over a wide range of operating conditions as long as the parameters are accurately corrected. The performance of the modified model for practical IC engine applications is further assessed and the results show that the computational error is effectively reduced due to the incorporation of the modified model in the conjugate heat transfer simulation of the cylinder head and cylinder head cooling gallery.
机译：在开发内燃机（IC）冷却系统时，任何基于沸腾的策略都需要准确预测冷却剂侧的热传递。结合过冷沸腾模型的计算流体力学（CFD）模拟是进行此类分析的有效方法。但是，大多数现有模型是在某些不同于IC发动机的特殊流动和沸腾条件下开发的，当将它们直接应用于IC发动机冷却通道内的CFD分析时，不可避免地会导致很大的差异。基于划分描述方法，提出了一种参数可调的改进模型。将通过不同沸腾模型预测的热通量与在冷却通道模拟器通道中获得的实验数据进行比较。结果表明，只要正确地校正参数，修改后的模型就可以在较大的工作条件范围内预测沸腾热通量，从而获得更高的精度。进一步评估了修改后的模型在实际IC发动机应用中的性能，结果表明，由于将修改后的模型并入了汽缸盖和汽缸盖冷却通道的共轭传热模拟中，有效地减少了计算误差。

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