OPTIMASI DIAMETER PANEL HONEYCOMB PADA LOW SPEED WIND TUNNEL TIPE TERBUKA UNTUK SARANA PEMBELAJARAN MENGGUNAKAN SIMULASI CFD

DAMANIK, APRI JENRIKO (2023) OPTIMASI DIAMETER PANEL HONEYCOMB PADA LOW SPEED WIND TUNNEL TIPE TERBUKA UNTUK SARANA PEMBELAJARAN MENGGUNAKAN SIMULASI CFD. S1 thesis, Universitas Mercu Buana Jakarta.

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Abstract

An open type low speed wind tunnel as a learning tool has been widely designed. However, from the evaluation results carried out by previous researchers, the open type low speed wind tunnel is still not optimal, because the turbulence intensity value is still relatively high to be used as a learning tool. This flow fluctuation is undesirable in aerodynamic experiments so it is necessary to add honeycomb panels. Many experiments have been conducted regarding the performance of honeycomb panels in reducing turbulence intensity. However, the results are still not optimal. Through various studies in experiments related to the performance of honeycomb panels in reducing turbulence intensity, no one has conducted simulations on the honeycomb diameter size, so there is no information regarding the resulting turbulence intensity. Based on these problems, this research is focused on optimizing the honeycomb panel diameter design to obtain the optimal honeycomb diameter size in order to obtain very small turbulence intensity results in an open type wind tunnel. The method used in this study is a numerical computational method in the form of CFD (Computational Fluid Dynamics). In this evaluation process, using a 2D design starting from the settling chamber to the diffuser was made based on the open type low speed wind tunnel design. The turbulence model used is (k-Omega Shear Stress Transport) k-ω SST with the porosity model used is the Van Winkle model to model the honeycomb panel in the settling chamber section. The total pressure of 30.93 Pa is set as the inlet and the flow rate is 10.26 kg/s as the outlet. The results of the turbulence intensity obtained through simulation in an open type wind tunnel without honeycomb panels is 0.48%, while those using honeycomb panels with a honeycomb hydraulic diameter of 0.01 m are 0.477%, for honeycomb hydraulic diameters of 0.00959 m are 0.476%, and for honeycomb hydraulic diameter of 0.009 m is 0.47703%. Through the data that has been obtained and then an optimization process is carried out, through this optimization process the best honeycomb diameter is obtained at the honeycomb hydraulic diameter (

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