Development and verification of an in-flow water condensation model for 3D-CFD simulations of humid air streams mixing
Development and verification of an in-flow water condensation model for 3D-CFD simulations of humid air streams mixing
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DOI：
10.1016/j.compfluid.2018.02.032
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发表时间：
2018-05
影响因子：
2.8
通讯作者：
J. Serrano;P. Piqueras;R. Navarro;D. Tarí;Cesare Maria Meano
中科院分区：
文献类型：
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作者：
J. Serrano;P. Piqueras;R. Navarro;D. Tarí;Cesare Maria Meano
由不同温度和湿度的气流混合引起的体积流冷凝是一个热力学过程，需要很强的假设，计算量小。正确预测这一现象的模型的适用性最近得到了提高，部分原因是内燃机中采用了长路线废气再循环减排技术，以及进气与燃烧气体混合时产生的冷凝对涡轮增压器造成的损害。这项工作旨在揭示在商业3D-CFD代码中实现的冷凝模型，然后进行验证，检查实现的物理方程是否按预期运行。最后进行了实际应用，验证了该模型预测LR-EGR t型接头冷凝水的潜力。
Bulk flow condensation caused by the mixing of air streams at different temperatures and humidities is a thermodynamic process that requires strong assumptions to be calculated with low computational effort. The applicability of a model that correctly predicts this phenomenon has grown recently due in part to the deployment of the Long Route Exhaust Gas Recirculation emission reduction technique in combustion engines and the damage to the turbocharger caused by the condensation produced when the intake air is mixed with the combustion gases. This work is addressed to expose a condensation model that is implemented in a commercial 3D-CFD code and is then verified, checking whether the implemented physical equations are behaving as intended. Finally, a practical application is made, showing the potential of model to predict water condensation in a LR-EGR T-joint.