Question

assessment. Question 7 Question 70 4 points Save Answ A centrifugal compressor running at 16,882 rpm delivers air with a stagnation pressure ratio of 4. The total-to- total isentropic efficiency is 80%. The stagnation temperature at inlet is 290 K, slip factor 0.9, power input factor 1.04 and Calculate the external diameter of the impeller. DOLL 1 & 0 8 a % *. 5 7 $ 4 # 3 1 6 o T 2 T Y 9 R E T W š K F GS HI]

Answer 1

T 4 » Tog' Process 1-2 : isentropic comporessias 1 Сотчет To2 То) (1). top - to) 2 of Tog' - Toi Tolz 290k (given) To2 2 P2 pi No 1 14-) To2 (ч) 1-ч 2 2. Що (To2 ч зо, а 2.9 k о-е 2 То 2-то) toy - To 4 3D - 4 24 - 24o o - 8 2 to, - Lo to'Ч66-16 4А Е

Slip factor, 6 2 0.9 Power fecehs Ф 2 1.04 work input win 2 Wina (Toz? - Tos) 2 4042² 1.005x(1000) (466.1622 - 290) 1,048 0.9% 4₂² z Ug 434.912 mies 2 TON 434.912 z 60 TXDX 16882 2 434.912 Go D 2 0.498015m external diameter of impeller