Air Flow Around Bodies In Subsonic Wind Tunnel

Lim, Fong Kiaw (2009) Air Flow Around Bodies In Subsonic Wind Tunnel. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

In this study, air flow around bodies in a subsonic wind tunnel is investigated. The investigation focuses on drag force for two slightly different in percentage of camber for the streamlined body based on the existing NACA four-digit series airfoil model. In order to reduce the drag force to get a better performance of airfoil, the drag force was measured and determined through the subsonic wind tunnel test. Computational Fluid Dynamic was used to simulate the external flow analysis on the airfoils and then the prediction of the drag force to validate its simulation result with the experimental result. NACA 2412 and NACA 4412 airfoil geometry profiles and its coordinates were generated from a NACA 4 Digits Series Generator and then designed by using Solidworks software. The airfoil models were made by rapid prototyping to run the wind tunnel tests. The results revealed that NACA 2412 has a better performance due to its smaller drag force compared to NACA 4412. However, NACA 4412 has a greater lift force than the NACA 2412. Moreover, smaller drag had better performance among the others due to its less fuel consumption during cruising speed.

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