Glossary
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Abbreviation |
Description |
|
SI Dimension |
|
|
|
|
A |
Flow cross area |
|
[m²] |
Aratio |
throat/exit area ratio |
|
[ - ] |
Athr_rel |
A throat relative to A throat design (Athr/Athrdes) |
|
[ - ] |
BPR |
Bypass ratio |
|
[ - ] |
bld |
bleed flow |
|
|
c |
core flow (fan, mixer) |
|
|
Cf |
Correction factor for effective fan duct or core |
[ - ] |
|
cl |
cooling flow |
|
|
d |
duct flow (fan, mixer) |
|
|
delta |
pressure normalized to ISA = p[bar]/1.01325 |
|
|
DP |
Design Point (simulation/calculation mode) |
|
|
DHWin |
change in H*Win |
|
[kW] |
DHWcl |
shaft power produced by turbine cooling flow |
|
[kW] |
DHWkincl |
shaft power needed to increase turbine cooling |
[kW] |
|
Droop |
Proportional gain in rotor speed governor (P in PID control) |
||
dTs |
Deviation from ISA standard temperature |
|
[K] |
Elco |
carbon monoxide emission index |
|
[g/(kg fuel)] |
Elnox |
nitrogen oxide emission index |
|
[g/(kg fuel)] |
Eluhc |
unburned hydrocarbons emission index |
|
[g/(kg fuel)] |
Eta |
efficiency |
|
[ - ] |
FAR |
Fuel air ratio |
|
[ - ] |
Fbld |
bleedfraction |
|
[ - ] |
Gross thrust |
|
[kN] |
|
Net thrust |
|
[kN] |
|
H |
specific enthalpy |
|
[kJ/kg] |
Hbld |
bleed flow specific enthalpy |
|
[kJ/kg] |
ISA |
International Standard Atmosphere |
|
|
LHV |
Lower Heating Value |
|
[kJ/kg] |
Mach, Macha |
Flight mach number |
|
[ - ] |
Mexit |
exit speed in Mach |
|
[ - ] |
N |
rotor speed |
|
[rpm] |
Nc |
corrected rotor speed |
|
[rpm] |
Ndm |
demanded rotor speed |
|
[rpm] |
Nerror |
rotor speed error signal in control system |
|
[rpm] |
Nsens |
rotor speed signal sensed in control system |
|
[rpm] |
OD |
Off-design (simulation/calculation mode) |
|
|
Pacc |
accelleration power |
|
[kW] |
Pb |
Pressure in combustor. "burner pressure" |
|
[bar] |
Pbld |
Bleed flow pressure |
|
[bar] |
PLA |
Power Lever Angle |
|
[°] |
PR |
Pressure Ratio |
|
[ - ] |
PS, Ps |
Static pressure |
|
[bar] |
PSexit |
static exit pressure |
|
[bar] |
Pt, PT |
total pressure |
|
[bar] |
Shaft power output |
|
[kW] |
|
Ram drag |
|
[kN] |
|
RR |
Ram Recovery factor |
|
[RR] |
Shaft Power Specific Fuel Consumption |
|
[kg/(kW h)] |
|
SN |
smoke number |
|
|
Tbld |
bleed flow temperature |
|
[K] |
Tcorr |
corrected temperature |
|
[K] |
theta |
temperature normalized to ISA = T[K]/288.15 |
|
|
Time |
time |
|
[s] |
TRQ |
torque |
|
[N m] |
TSexit |
static exit temperature |
|
[K] |
Thrust Specific Fuel Consumption |
|
[kg/(N h)] |
|
TT |
total temperature |
|
[K] |
Vc |
Calibrated air speed |
|
[m/s] |
Vt |
True air speed |
|
[m/s] |
W |
air or gas mass flow rate |
|
[kg/s] |
Wbld |
bleed mass flow rate |
|
[kg/s] |
Wc |
corrected mass flow rate |
|
[kg/s] |
Wf |
fuel flow |
|
[kg/s] |
WfPb |
fuel flow devided by burner pressure |
|
[(kg/s)/(bar)] |
WfPblead |
WfPb lead signal (differential term in PID control) |
|
[(kg/s)/(bar)] |
WfPbmax |
Maximum acceleration schedule WfPb |
|
[(kg/s)/(bar)] |
WfPbmin |
Minimum deceleration schedule WfPb |
|
[(kg/s)/(bar)] |
WfPbtrim |
WfPb trim signal (integral term in PID control) |
|
[(kg/s)/(bar)] |
Zp |
Pressure altitude |
|
[m] |