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Application of nanofluids in cooling of engine combustion components

机译：纳米流体在发动机燃烧部件冷却中的应用

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摘要

Nanofluids is a kind of high efficient strengthening heat-transfer medium on account of its high thermal conductivity. In this paper, Cu-water nanofluids was applied in the cooling of engine combustion components and the commercial CFD software STAR-CD was employed to perform the 3-D numerical simulation of engine cooling system with different concentration nanofluids. The flow field, the pressure field and the heat-transfer coefficient distribution on the wall was clearly revealed by the simulation. Compared with the water, Cu-water nanofluids can evidently enhance the heat-sinking capability of engine, and the enhancement was larger with increasing the concentration of nanoparticles. When the concentration was 5%, the heat dissipating capacity increased by 43.85%. With a remarkable enhancement on heat-transfer capability, the velocity of fluid in engine cooling jacket kept almost the same, and the total pressure reduction only increased by 7%, which can all be accepted.
机译：纳米流体由于其高导热率而成为一种高效的强化传热介质。本文将铜水纳米流体应用于发动机燃烧部件的冷却，并使用商用CFD软件STAR-CD对不同浓度的纳米流体对发动机冷却系统进行3-D数值模拟。通过仿真清楚地显示了壁上的流场，压力场和传热系数分布。与水相比，Cu-水纳米流体可以明显增强发动机的散热能力，并且随着纳米颗粒浓度的增加，其增强作用更大。当浓度为5％时，散热能力增加了43.85％。随着传热能力的显着提高，发动机冷却套中的流体速度几乎保持不变，总压降仅增加了7％，这是可以接受的。

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