Calcule de turbine

nmax=umaxda . π

= 2500,065.π

nmax=1224.26m /s

u=dm . π . nmax dm=da+di2

=0.065+0.0422

=0,0535

u=0,0535.π .1224u=205,72m / s

c2=u . tan β2

c2=205. tan37=155m /s

m=S . c2 . ρ

S=(da2−d i2 ) . π

4

S=(0.0642−0.0422 ) . π

4=0,0019m2

m=0,0019 .155 .0,4=0,1198kg /s

F=m .c2

F=0,1198 .155=18.57N

Calcule de la température

T 1=20 °C Température de l’air ambiant

u2 . η=c p .T 1(π0.285−1)

η=0,7Le rendement de la compresser centrifuge

F=m .c2

m=S . ρ . c2

F=m . mS . ρ

m=√F . S . ρ

m=√0,0019.0,39 .18=0,1155kg /s

c2=Fm

= 180,1155

=155.84m /s

Calcule de compresser centrifuge

σ=2n√ V π

(2Y t )34

y t=42800 J /kg

V=0.097m3 /s

σ=2.1224√0,097.π(2 .42800 ) 3

4

σ=0.021

σ=ρ. u1

2 .b12 .cos β1

d1 . e

σ=8050 .165.342 .0.0132 .cos 34 °

0.043 .0 .001

σ=691071057 Pa≈691N /mm2