Page 10 - Mechanical Engineer's Data Handbook

Symbols used in text

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a Acceleration j Operator J- 1
A Area J Polar second moment of area
d Anergy k Radius of gyration; coefficient of thermal
b Breadth conductivity; pipe roughness
b.p. Boiling point K Bulk modulus; stress concentration
B Breadth, flux density factor
C Clearance, depth of cut; specific heat KE Kinetic energy
capacity K, Wahl factor for spring
C Couple; Spring coil index; velocity 1 Length
(thermodynamics); heat capacity L Length
Cd Drag coefficient, discharge coefficient rn Mass; mass per unit length; module of
COP Coefficient of performance gear
CP Specific heat at constant pressure m Mass flow rate
CY Specific heat at constant volume; velocity m.p. Melting point
coefficient M Mass; moment; bending moment;
cv Calorific value molecular weight
d Depth; depth of cut; diameter; MA Mechanical advantage
deceleration n Index of expansion; index; number of;
D Depth; diameter; flexural rigidity rotational speed
e Strain; coefficient of restitution; N Rotational speed; number of
emissivity Ns Specific speed
E Young’s Modulus; energy; luminance; Nu Nusselt number
effort V Pressure; pitch
EL Elastic limit; endurance limit P Power; force; perimeter
ELONG% Percentage elongation pr Prandtl number
8 Exergy PE Potential energy
f Frequency; friction factor; feed PS Proof stress
F Force; luminous flux Q Heat quantity; volume flow rate; metal
F, Strain gauge factor removal rate
FL Fatigue limit r Radius; pressure or volume ratio
FS Factor of safety R Radius; electric resistance; reaction,
9 Acceleration due to gravity thermal resistance; gas constant
G Shear modulus; Gravitational constant Reynolds number
Gr Grashof number Re Refrigeration effect
RE
h Height; thickness; specific enthalpy; Ro Universal gas constant
shear, heat transfer coefficient S Specific entropy; stiffness
h.t.c. Heat transfer coefficient S Entropy, shear force, thermoelectric
H Enthalpy; height, magnetic field strength sensitivity
i slope; operator J-l SE Strain energy
I Moment of inertia; Second moment of s, Stanton number
area; luminous intensity, electric current t Temperature; thickness; time