Determine: 1. The basin dimensions. 2. The power required. 3. The impeller diameter if a vane-disc impeller with six flat blades is employed and the tank has four vertical baffles (one on each tank wall). The impeller diameter is to be 30 to 50% of the tank width. 4. The impeller diameter if no vertical baffles are used. 5. The air required if pneumatic mixing is employed and the diffusers are 0.15 m above the tank bottom.

Determine: 1. The basin dimensions. 2. The power required. 3. The impeller diameter if a vane-disc impeller with six flat blades is employed and the tank has four vertical baffles (one on each tank wall). The impeller diameter is to be 30 to 50% of the tank width. 4. The impeller diameter if no vertical baffles are used. 5. The air required if pneumatic mixing is employed and the diffusers are 0.15 m above the tank bottom.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Highway Drainage

Highway drainage is the process of extracting and regulating the excess surface water on the pavement by giving the desired slope. The construction of a highway drain helps to divert the water present on the surface, and sub-grade by the means of slope. Highway drainage systems are a necessary part of smooth functioning of traffic, since the highway drainage systems provide proper disposal of unwanted substances from the highways.

Question

A square rapid-mixing basin, with a depth of water equal to 1.25 times the width, is to be designed
for a flow of 7570 m³/d. The velocity gradient is to be 790 mps/m, the detention time is 40 s. The
operating temperature is 10°C, and the turbine shaft is 100 rpm (µ = 0,00131 Ns/m² at 10°C, KL
= 65, KT= 5.75).
Determine:
1. The basin dimensions.
2. The power required.
3.
The impeller diameter if a vane-disc impeller with six flat blades is employed and
the tank has four vertical baffles (one on each tank wall). The impeller diameter is to
be 30 to 50% of the tank width.
4.
The impeller diameter if no vertical baffles are used.
5. The air required if pneumatic mixing is employed and the diffusers are 0.15 m above
the tank bottom.

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