DEVELOPMENT OF AXIAL-FLOW PUMP FOR SURFACE IRRIGATION SYSTEMS
HESHAM MOHAMED EMAM;
Abstract
The main objective of this study is to develop an axial-flow pump, which is more suitable for surface irrigation in Egypt (low lift,
3m or less).
The developed axial-flow pump has 200 mm diameter inlet end (1.5 mm thick, steel sheet tube). It sloped at 22.5° to meet the impeller tube (150 mm diameter, 1.5 mm thick, steel sheet tube) in a conical shape. The pump casing, which has 90° elbow shape, was welded with two flanges, one (203.2 mm diameter) at the inlet end and the other (152.4 mm diameter) at the outlet end. The pump casing was, also, reinforced by four plats (3 mm thick, steel sheet) to fasten firmly the pump casing to the base. The axial-flow impeller is screwed to the pump shaft and the shaft is connected to the kerosene engine through a flexible coupling. A diffusion vane is used to straighten the flow stream of the water from the impeller. The whole unit is carried on four wheels cart.
Four different types of impeller, three of them were single stage
and the 41
was double stage,• were tested. The dimensional
analysis is used to compare the pump mechanical performance with different types of impeller and present the experimental data compactly. The dimensionless equations were:
gH Q pn02 £
n202 = g1(n03 ,-IJ-,0)
bhp Q pn02 £
3 s = g2(-
.--. )
pn 0
n0 1-1 0
They are reduced to CH = CH (Co). Cp = Cp (Co). 11 = 11 (Co):
where
Co (Capacity coefficient) Co = Q 1 n 03
CH (Head coefficient) CH = gh I n2 02
Cp (Power coefficient) Cp = bhp 1 p n3 05
3m or less).
The developed axial-flow pump has 200 mm diameter inlet end (1.5 mm thick, steel sheet tube). It sloped at 22.5° to meet the impeller tube (150 mm diameter, 1.5 mm thick, steel sheet tube) in a conical shape. The pump casing, which has 90° elbow shape, was welded with two flanges, one (203.2 mm diameter) at the inlet end and the other (152.4 mm diameter) at the outlet end. The pump casing was, also, reinforced by four plats (3 mm thick, steel sheet) to fasten firmly the pump casing to the base. The axial-flow impeller is screwed to the pump shaft and the shaft is connected to the kerosene engine through a flexible coupling. A diffusion vane is used to straighten the flow stream of the water from the impeller. The whole unit is carried on four wheels cart.
Four different types of impeller, three of them were single stage
and the 41
was double stage,• were tested. The dimensional
analysis is used to compare the pump mechanical performance with different types of impeller and present the experimental data compactly. The dimensionless equations were:
gH Q pn02 £
n202 = g1(n03 ,-IJ-,0)
bhp Q pn02 £
3 s = g2(-
.--. )
pn 0
n0 1-1 0
They are reduced to CH = CH (Co). Cp = Cp (Co). 11 = 11 (Co):
where
Co (Capacity coefficient) Co = Q 1 n 03
CH (Head coefficient) CH = gh I n2 02
Cp (Power coefficient) Cp = bhp 1 p n3 05
Other data
| Title | DEVELOPMENT OF AXIAL-FLOW PUMP FOR SURFACE IRRIGATION SYSTEMS | Other Titles | تطوير المضخة المحورية لنظم الرى السطحى | Authors | HESHAM MOHAMED EMAM | Issue Date | 2001 |
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