Determination of airflow characteristics for a set of stabilizer and elevator using simulation software

Abas, Mohd Firdaus (2013) Determination of airflow characteristics for a set of stabilizer and elevator using simulation software. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

The airflow across the horizontal tail of STOL CH 750 light aircraft was investigated to obtain reliable result data regarding its characteristics. In particular, the simulation involving the horizontal tail, which consists of stabilizer and an elevator, was carried out to study the critical angle of attack for 11 elevator deflection cases at certain Reynolds and Mach numbers of the incident airflow. The horizontal tail geometry was firstly obtained using SolidWorks 2012 and analyzed. The model was meshed using three-dimensional tetrahedron meshing method and was stimulated under specified boundry conditions and parameters. The simulations are done for-28o to 28o elevator deflection angles at -20o to 20o angles of attack, where the effective angles of attack was taken into account. At Re = 2 630 000 (i.e. Re > 10 000) and Ma = 0.139 (i.e. Ma < 0.4), the airflow was turbulent and incomprehensible. In the case of downward deflections, as the deflection angle decreases, drag coefficient Cd and that of lift C1 also decrease. Its corresponding stall’s angle of attack gradually increases within 2.5o margin. The coefficients Cd and C1 increases as the deflection angle increases, in the case of upward deflections, and the corresponding stall’s angle of attack gradually decreases within 2.5o margin.

Item Type:Thesis (Masters)
Subjects:T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL500-778 Aeronautics. Aeronautical engineering
ID Code:3685
Deposited By:Normajihan Abd. Rahman
Deposited On:13 Jan 2014 16:04
Last Modified:13 Jan 2014 16:04

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