Page 16 - Fluid Mechanics and Thermodynamics of Turbomachinery

List of Symbols

A area
a sonic velocity, position of maximum camber
b passage width, maximum camber
C f tangential force coefficient
C L ,C D lift and drag coefficients
C p specific heat at constant pressure, pressure coefficient, pressure rise
coefficient
C pi ideal pressure rise coefficient
specific heat at constant volume
C v
axial and tangential force coefficients
C X ,C Y
c absolute velocity
spouting velocity
c o
D drag force, diameter
equivalent diffusion ratio
D eq
hydraulic mean diameter
D h
E, e energy, specific energy
centrifugal force in blade
F c
f acceleration, friction factor
g gravitational acceleration
H head, blade height
H E effective head
H f head loss fue to friction
H G gross head
H S net positive suction head (NPSH)
h specific enthalpy
I rothalpy
i incidence angle
K, k constants
K N nozzle velocity coefficient
L lift force, length of diffuser wall
l blade chord length, pipe length
M Mach number
m mass, molecular ‘weight’
N rotational speed, axial length of diffuser
specific speed (rev)
N S
power specific speed (rev)
N SP
suction specific speed (rev)
N SS
n number of stages, polytropic index
p pressure