21st Congress of International Council of the Aeronautical Sciences, Melbourne, Australia, 13-18 September, 1998
Paper ICAS-98-R.3.3

FLIGHT RESEARCHES OF VISCOSITY INFLUENCE ON SHARP CONES AERODYNAMICAL CHARACTERISTICS IN HYPERSONIC LOW DENSITY FLOW

Byzov V. N.
Flight Research Institute (Lil Gromov), Russia

Keywords: viscosity, sharp cones, aerodynamic characteristics, hypersonic, low density flow

This paper presents free-flight test technique and the results of investigations of hypersonic viscous interaction influence on skin friction and pressure over sharp cones surface. Semivertex angles of cones are 9,6 and 15 degrees. Investigations were carried out at ranges of Mach number 5,5 ... 9 and flight altitude 50...96 km. The local skin friction coefficient was determined on the basis of direct measurement of the force, which acts on surface element. At the time of flight there were also made measurements of the pressure and temperature on cones surface. On the basis of flight experimental data there was carried out the validation of flow calculations method over sharp-nosed axisymmetric bodies in a hypersonic low density flow.

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