- #1
suryanarayan
- 20
- 0
As I was going through a course on Hydraulics, there was a brief explanation about how the atmospheric pressure can only support a water column of 10.3 m.A few more points that are prerequisite to the discussion are as follows
1)A fluid cannot be pulled;it has to be pushed.
2)A centrifugal pump's impeller ,on rotation,throws fluid away from the eye(due to the centrifugal force) and creates a partial vacuum at the eye.
So ,consider the following situation given in the figure
The experiment is conducted in normal atmospheric conditions
1)We fill the suction side and the discharge with water completely.This is possible because the check valve prevents the fluid from escaping.Now the impeller is completely immersed in water.
2)The pump is started runs at a very high rpm.
What is going to happen in the situation?
My thoughts are as follows:
The impeller throws the fluid to the discharge ,partial vacuum is created at eye,the check valve opens and since the weight of the water column is higher than what the atmospheric pressure can hold,the water drains to the tank.This creates a flow discontinuity in the suction side.
Will that be the case or will something else happen?
1)A fluid cannot be pulled;it has to be pushed.
2)A centrifugal pump's impeller ,on rotation,throws fluid away from the eye(due to the centrifugal force) and creates a partial vacuum at the eye.
So ,consider the following situation given in the figure
The experiment is conducted in normal atmospheric conditions
1)We fill the suction side and the discharge with water completely.This is possible because the check valve prevents the fluid from escaping.Now the impeller is completely immersed in water.
2)The pump is started runs at a very high rpm.
What is going to happen in the situation?
My thoughts are as follows:
The impeller throws the fluid to the discharge ,partial vacuum is created at eye,the check valve opens and since the weight of the water column is higher than what the atmospheric pressure can hold,the water drains to the tank.This creates a flow discontinuity in the suction side.
Will that be the case or will something else happen?