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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

: <i>D</i> is the cylinder diameter (m);

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

: <i>d</i> and <i>d</i>₁ are the diameters of the leading and trailing disks divided by <i>D</i>;

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

: <i>R</i> 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;

: <i>u</i> and <i>v</i> are the axial and radial components of the flow velocity;

: <i>p</i> is the static pressure nondimensionalized by the double dynamic pressure;

: ρ and <i>T</i> are density and the temperature divided the corresponding free-stream parameters;

: <i>k</i> and µ_t are the turbulence energy and the eddy viscosity nondimensionalized by the corresponding free-stream parameters;

: <i>Ср</i> is the pressure coefficient equal to 2 <i>р</i>;

: <i>С</i>_<i>хр</i> is the profile (wave) drag;

: <i>С</i>_<i>хf</i> 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.