Numerical Simulation of a Semi-Confined Slot Turbulent Impinging Jet
Chen Qingguang(1), Xu Zhong(1), Zhang Yongjian(2)
(1, Xi'an Jiaotong University Xi'an 710049)
(2, Shandong University of Science and Technology Tai'an 271019)

Abstract: An RNG based k-ŠĆ model derived by Yakhot and Orszag is extended to the numerical simulation of a semi-confined slot turbulent impinging jet flow in order to assess the model's predictive capability for complex turbulence flows. Computational results, which involve the mean velocity profiles, the turbulent intensity profiles and the stream-function contours, are compared with those from the standard k-ŠĆ model and with the corresponding experimental data. It is shown that the RNG k-ŠĆ model is generally better than the standard k-ŠĆ model. However, to some extent, there are differences between all results predicted by the RNG k-ŠĆ model and the experimental data, especially for the turbulent intensity profiles in the near-wall region and further downstream the stagnation point. It means that, although achivements have been gained by RNG k-ŠĆ model in the prediction of some turbulent flows, modifications should be performed to the model for accurately simulating the slot impinging jet flow.
Keywords: turbulence model, slot impinging jet, numerical simulation.