Aircraft Engine Design, Second Edition

Nomenclature

Nomenclature (Chapters 1 3)

A

= area

AB

= afterburner

AOA

= angle of attack, Fig. 2.4

AR

= aspect ratio

a

= speed of sound

a

= quantity in quadratic equation

b

= quantity in quadratic equation

BCA

= best cruise altitude

BCM

= best cruise Mach number

C D

= coefficient of drag, Eq. (2.9)

= coefficient of drag at maximum L/ D, Eq. (3.27a)

C DR

= coefficient of additional drags

C DRC

= coefficient of drag for drag chute

C D0

= coefficient of drag at zero lift

C L

= coefficient of lift, Eq. (2.8)

= coefficient of lift at maximum L/ D, Eq. (3.27b)

C 1

= coefficient in specific fuel consumption model, Eq. (3.12)

C 2

= coefficient in specific fuel consumption model, Eq. (3.12)

c

= quantity in quadratic equation

D

= drag

d

= infinitesimal change

e

= planform efficiency factor

exp

= exponential of

f s

= fuel specific work, Eq. (3.8)

g

= acceleration

g c

= Newton's gravitational constant

g 0

= acceleration of gravity

h

= height

K 1

= coefficient in lift-drag polar equation, Eq. (2.9)

K 2

= coefficient in lift-drag polar equation, Eq. (2.9)

K'

= inviscid drag coefficient in lift-drag polar equation, Eq. (2.9)

K"

= viscous drag coefficient in lift-drag polar equation, Eq. (2.9)

k obs

= velocity ratio over obstacle, Eq. (2.36)

k TD

= velocity ratio at touchdown, ( V TD = k TDV STALL

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