Question

QUESTION 3 shown in the figure 1. The area of the outer periphery is 0.65 m, the pump discharges 1550 L/s and the o st inlet is radial The exit velocity trianosie of thie quectin is shoun in Eiour h outlet vane angle is set back at an angle of 220 to the tangent a Fiqure 1: Centri fugal impeller with backward facing vane (b) (a) W2 (d) (c) U, Figure 2: Valocity triangles of a centrifugal impeller with velocily) 13.19 Which one of the velocity triangles shown in figure 2 represents the one at the e backward curved vanes? (U2, periphe 8.08 V2 absolute velocity, W2 relativ C p D. 148.5 The peripheral velocity 2 (in m/s) is The relative velocity W2 0n m/s) is 162.5 . 18.2 The whirl velocity Vu2 (in m/s) is: H. 5.64 The power developed (in kW) . D K 7.64

Answer 1

Centrijugal P ump 1-Sm outer diamele & 2 lo pm 220 outlet anyl V0ne oute Area duschasge ISSO L -SS9 Snkel is adial FlOn at coYeck AnSueY (a tugal impells Lit, frucing Bact Cemti V(vne warel Vr do not ls fugal pumps curird Vnes have luck ahl howe vey tor cintri fuzal BxKLnd urve fre de sign as Atren Cont as o the ealiey Vanecl pumys enceeds eta case i rerent as evident thoz. drops fue cures lown

FoAwardd faing (A Radial 90°) heal Hrad Discharge 3 ndet R= 0' So arlia Vua ( wmit veloud) 0 Out Let Tiung V. peripheru velrui hg 60 $/u&h.9 Dischage Axea ouet velouh SS OES

2 3 V V » = SO Vv V VJ 2 Re Tum U,-Vu Vcasp てwnp 2 3Y 16. Me- Vuv Vuy Vuv Io 52m/ Velrity Jin 220- Vwy Vur Vf Belntive Velotity

a Vu Ur