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Article History

Received: 12 July 2022

Revised: 20 July 2022

Accepted: 20 July 2022

First Online: 29 November 2022

LIST OF NOTATION

: D is the cylinder diameter (m);

: U is the free-stream velocity (m/s);

: d and d 1 are the diameters of the leading and trailing disks divided by D ;

: L and L 1 are the gaps between the leading and trailing disks and the cylinder faces divided by D ;

: R is the rounding radius of the cylinder edges;

: Re and М are the Reynolds and Mach numbers determined from the free-stream parameters and the cylinder diameter;

: u and v are the axial and radial components of the flow velocity;

: p is the static pressure nondimensionalized by the double dynamic pressure;

: ρ and T are density and the temperature divided the corresponding free-stream parameters;

: k and µ t are the turbulence energy and the eddy viscosity nondimensionalized by the corresponding free-stream parameters;

: Ср is the pressure coefficient equal to 2 р ;

: С хр is the profile (wave) drag;

: С хf is the friction drag of the cylinder with the aspect ratio 4.5 and coaxial disk;

: Subscripts:

: max and min are the maximum and minimum values.