Mean diameter sheath

Symbol

$d_{sh}$

Unit

mm

Formulas

$D_{shb}+t_{sh}+\Delta d_{sh}$

Related

$D_{shb}$

Diameter below sheath [mm]

$\Delta d_{sh}$

Depth of corrugation [mm]

$t_{sh}$

Thickness sheath [mm]

Used in

$A_{sh}$

Cross-sectional area sheath [mm$^2$]

$d_s$

Equivalent diameter of screen and sheath [mm]

$F_{ar}$

Factor $F$ armour losses

$r_{z2,sh}$

Radius sheath (inner) [m]

$r_{z3,sh}$

Radius sheath (outer) [m]