What is centrifugal pump and reciprocating pump.

What is centrifugal pump and reciprocating pump.

Centrifugal pump:- if the mechanical energy is converted in to pressure energy by means of centrifugal force acting on the fluid,

The hydraulic machine is called centrifugal pump.

Main parts of centrifugal pump:-

1. Impeller

2. Casing

3. Suction pipe with a foot valve and a strainer

4. Delivery pipe

5. Delivery valve

6. Eye of pump

7. Sump

Reciprocating pump:- if the mechanical energy is converted in to hydraulic energy by sucking the liquid in to a cylinder. The pump is known as reciprocating pump.

Main parts of reciprocating pump:-

1. Delivery pipe

2. Delivery valve

3. Cylinder

4. Piston

5. Connecting rod

6. Crank

7. Suction valve

8. Suction pipe

9. Piston rod

10.Sump level

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Equation of motion

Equation of motion A net force fx acting on a fluid element in the direction of x is equivalent to the mass (m) of the fluid element, according to the second low of movement of newton. Multiplied by the acceleration a x in the x- direction. Thus mathematically, F x =m x a x --- (1) In the fluid flow, the fllowing forces are present : (1) F g . gravity force. (2) F p . the pressure force. (3) F v . the force due to viscosity (4) F t . force due to turbulenes. (5) F c . Force due to compressibility. Thus in equastion (1).the net force. F x = (f g ) x + (f p ) x +(f v ) x + (f t ) x +(f c ) x . (1)if the force due to compressibility, f c is negligible the resulting net force. F x = (f g ) x + (f p ) x +(f v ) x + (f t ) x and equation of motion are called reynold’s equation.

problem:- A circular tank of diameter 4m contains water up to a height to 5m. Orifice of diameter 0.5m at the bottom. Find the time taken by water:- 1. To fall from 5m to 2m 2. For completely emptying to tank take cd=0.6

A circular tank of diameter 4m contains water up to a height to 5m. Orifice of diameter 0.5m at the bottom. Find the time taken by water:- 1. To fall from 5m to 2m 2. For completely emptying to tank take cd=0.6

What is classification of turbines ?

What is classification of turbines ? Turbine are classified under the following categories – 1. According to the types of energy:- (a). impulse turbine (b). reaction turbine 2. According to the direction of flow through runner:- (a). tangential flow turbine (b). radial flow turbine (c). axial flow turbine (d). mixed flow turbine 3. According to the head at the inlet of turbine:- (a). high head turbine (b). medium head turbine (c). low head turbine 4. According to the specific speed of turbine:- (a). low specific speed turbine (b). medium specific speed turbine (c). high specific speed turbine

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