REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

Preliminary measurements of aerodynamic characteristics of the HB standard model in the trisonic wind tunnel of VTI

Dijana Damljanović

Military Technical Institute, Belgrade, didamlj@gmail.com

Đorđe Vuković

Military Technical Institute, Belgrade, vdjole@sbb.rs

Aleksandar Vitić

Military Technical Institute, Belgrade, sasavitic@gmail.com

Jovan Isaković

Military Technical Institute, Belgrade, jovanisakovic@gmail.com

dušan ćurčić

Military Technical Institute, Belgrade, shane55_bg@yahoo.com

Abstract: Tests with standard models serve to confirm the overall wind tunnel data quality and to provide confidence in results obtained. Because of high supersonic  starting loads, the T-38 trisonic blowdown wind tunnel in VTI has not, so far, been verified above Mach 2 by using standard models. As a part of a current VTI’s research programme, two configurations of the HB standard model were designed, produced and tested in the Mach number range 1.5 to 4 at Reynolds number ranging from 3.2 to 5.4 millions. The results are considered preliminary, as an extensive test schedule with the same models is planed after modifications and recalibration of the wind tunnel. Measurements of forces and moments were performed with an internal six-component balance, and flowfield visualization was performed by the schlieren method. Tests results were compared with available references from AEDC, NASA-Ames and ONERA.

Key words: wind tunnel, supersonic flow, HB standard model, aerodynamic characteristics, flow visualization.