Question

Chapter 05, Problem 020 Various types of attachments can be used with the shop vac shown in the Video. Two such attachments are shown in the figure below-a nozzle and a brush. The flowrate is 0.6 ft/s. (a) Determine the average velocity through the nozzle entrance, Vn. (b) Assume the air enters the brush attachment in a radial direction all around the brush with a velocity profile that varies linearly from 0 to Vb along the length of the bristles as shown in the figure. Determine the value of Vb. Q = 0.6 ft/s Q=0.6 ftels 1.2 in. 2 in. dia. ... v 1 2.5 in. dia. Iv, (a) Vn = (b) Vb =

Answer 1

9,= Q2 where Q2 = 0.6 ft3/s AN = Q2 V. v . 0.6 Y = m = - 1 | Vm = 27.582 ft/s 5) Q3 = 04 where Q4 = 0.6 163 ls Q3 = Uz Az where I = Vo 43 = T 13h3 93.9 0.6 = ("(?:)) V soal or 2 X (23) x T X (1/2) ] 50-610 6 = ft. 18.337