Study on oscillating cooling effect of highly-intensified piston considering turbulence model difference

In order to study the effect of different turbulence model on highly-intensified piston oscillating cooling, the numerical calculations using RNG k-ε model, Realizable k-ε model and SST k-ω model respectively were made to simulate the flow process of oscillating cooling, and to predict the heat transfer effect. After comparison with experimental data, the simulation result shows that: The calculating results by RNG k-ε model and Realizable k-ε model are similar, but far away from the experimental data. Using SST k-ω model can simulate the flow oscillating movement accurately, and its heat transfer coefficient is consistent with the experimental data. With the increase of Reynolds number, the error of calculated heat transfer coefficient begins to increase, which illustrates that SST k-ω model has a higher accuracy with lower Reynolds numbers.