Numerical Investigations of Model Support Interference in Subsonic and Transonic Wind Tunnels
Résumé
The aerodynamic interference effects of usual devices supporting aircraft models during wind tunnel tests have been studied by means of steady RANS simulations of the flow. The flow field and force disturbance caused by the supports were deduced by comparing simulations with and without support. Two configurations were addressed. The first one deals with low speed test of a large transport aircraft mounted on a circular strut. Only longitudinal forces on a clean configuration are studied. The second one deals with transonic test of a business jet model mounted on a Zsting. The support effect is analysed for several Mach numbers and angles of attack. Special attention was paid to the proper derivation of corrections of the incoming flow conditions in terms of Mach number and angle of attack. Comparison against experimental data is provided to validate the results.
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