PROBLEM 7 The velocity distribution in a pipe of radius ro is given by: - Annular Ring when m <1 Find the momentum correction factor B +dr PROBLEM 8 Viscous (laminar) of oil takes place down the slope between parallel plates, 8mm apart, held inclined at 30° to the horizontal. The oil of viscosity 0.92 kg/ms and of mass density 1320 kg/m³. The pressure of two points, Im vertically apart, are 40KN /m² and 170 kN/m², when the upper plates moves at 0.3 m/s . velocity relative to the lower plate in the direction opposite to the oil flow. Determine: i) ii) iii) Maximum velocity of the flow within the oil medium The shear stress on the top plate The rate of oil flow per metre width 170 kN/m 40 kN/m U= 0.3 ms Upper Plate 1m 1m 30 B (Datum) 8 mm Direction of oil flow Lower Plate PROBLEM 9 A siphon has rectangular throat section 2.2 m wide and the radius of the crown and crest ara 3m and 1.6m respectively. The energy losses are 0.2, 0.2, 0.6, and 0.5 times the mean head at throat respectively in the inlet, upper leg, lower leg and outlet portion. The atmospheric pressure of water is 10m of water. Determine: i) 3/4 The discharge when the reservoir level is 0.3m above the crest and the tail water level (outlet submerged) 6m below it. The minimum pressure at the throat section. ii) For submerged condition outlet velocity is 50% of the throat velocity. Width of throat, (L) = 2.2m Radius of crest, (R,) = 1.6m Radius of crown, (R,) = 3m Atmospheric pressure, (p,) = 10m of water , Mid of throat R T 3m = R, 0.7. 0.3m 6m 1.6m = R, Outlet (0) TWL
PROBLEM 7 The velocity distribution in a pipe of radius ro is given by: - Annular Ring when m <1 Find the momentum correction factor B +dr PROBLEM 8 Viscous (laminar) of oil takes place down the slope between parallel plates, 8mm apart, held inclined at 30° to the horizontal. The oil of viscosity 0.92 kg/ms and of mass density 1320 kg/m³. The pressure of two points, Im vertically apart, are 40KN /m² and 170 kN/m², when the upper plates moves at 0.3 m/s . velocity relative to the lower plate in the direction opposite to the oil flow. Determine: i) ii) iii) Maximum velocity of the flow within the oil medium The shear stress on the top plate The rate of oil flow per metre width 170 kN/m 40 kN/m U= 0.3 ms Upper Plate 1m 1m 30 B (Datum) 8 mm Direction of oil flow Lower Plate PROBLEM 9 A siphon has rectangular throat section 2.2 m wide and the radius of the crown and crest ara 3m and 1.6m respectively. The energy losses are 0.2, 0.2, 0.6, and 0.5 times the mean head at throat respectively in the inlet, upper leg, lower leg and outlet portion. The atmospheric pressure of water is 10m of water. Determine: i) 3/4 The discharge when the reservoir level is 0.3m above the crest and the tail water level (outlet submerged) 6m below it. The minimum pressure at the throat section. ii) For submerged condition outlet velocity is 50% of the throat velocity. Width of throat, (L) = 2.2m Radius of crest, (R,) = 1.6m Radius of crown, (R,) = 3m Atmospheric pressure, (p,) = 10m of water , Mid of throat R T 3m = R, 0.7. 0.3m 6m 1.6m = R, Outlet (0) TWL
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:is 0.25 m². Find:
i)
Фy and w,
The power required to keep the plate in steady motion
ii)
PROBLEM 7
The velocity distribution in a pipe of radius ro is given by:
m
Annular
when m<1
Ring
Vm
Find the momentum correction factor B
+dr
ro
PROBLEM 8
Viscous (laminar) of oil takes place down the slope between parallel plates, 8mm apart, held
inclined at 30° to the horizontal. The oil of viscosity 0.92 kg/ms and of mass density 1320
kg/m³. The pressure of two points, Im vertically apart, are 40KN/m² and 170 kN/m²,
when the upper plates moves at 0.3 m/s . velocity relative to the lower plate in the direction
opposite to the oil flow. Determine:
i)
ii)
iii)
Maximum velocity of the flow within the oil medium
The shear stress on the top plate
The rate of oil flow per metre width
170 kN/m?
40 kN/m?
U = 0.3 ms-1
Upper Plate
1m
8 mm
(Datum)
Direction of
oil flow
Lower Plate
30
PROBLEM 9
A siphon has rectangular throat section 2.2 m wide and the radius of the crown and crest ara
3m and 1.6m respectively. The energy losses are 0.2, 0.2, 0.6, and 0.5 times the mean
head at throat respectively in the inlet, upper leg, lower leg and outlet portion. The
atmospheric pressure of water is 10m of water. Determine:
i)
3/4
The discharge when the reservoir level is 0.3m above the crest and the tail water level
(outlet submerged) 6m below it.
The minimum pressure at the throat section.
ii)
For submerged condition outlet velocity is 50% of the throat velocity.
Width of throat, (L) = 2.2m
Radius of crest, (R,) = 1.6m
Radius of crown, (R,) = 3m
Atmospheric pressure, (p,) = 10m of water
, Mid of throat
RT
3m = R2
0.3m
- 6m
1.6m = R,
TWL
Outlet (0)
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