Centrifugal Pumps: Classification and parts of centrifugal pump, different heads and efficiencies of centrifugal pump, Theoretical head – capacity relationship, Minimum speed for starting the flow, Maximum suction lift, Net positive suction head, Cavitation, Need for priming, Pumps in series and parallel. Problems.
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Turbo machines module 5 VTU 18ME54
1. TURBO MACHINES
Course Code 18ME54 CIE Marks 40
Teaching Hours / Week (L:T:P) 3:0:0 SEE Marks 60
Credits 03 Exam Hours 03
[AS PER CHOICE BASED CREDIT SYSTEM (CBCS) SCHEME]
SEMESTER – V
Dr. Mohammed Imran
B. E. IN MECHANICAL ENGINEERING
2. TURBO MACHINES
Course Code 18ME54 CIE Marks 40
Teaching Hours / Week (L:T:P) 3:0:0 SEE Marks 60
Credits 03 Exam Hours 03
[AS PER CHOICE BASED CREDIT SYSTEM (CBCS) SCHEME]
SEMESTER – V
Dr. Mohammed Imran
B. E. IN MECHANICAL ENGINEERING
3. Course Objectives
Understand typical design of Turbo machine, their working principle,
application and thermodynamics process involved.
Study the conversion of fluid energy to mechanical energy in Turbo
machine with utilization factor and degree of reaction.
Analyse various designs of steam turbine and their working
principle.
Study the various designs of hydraulic turbine based on the working
principle.
Understand the various aspects in design of power absorbing
machine.
Dr. Mohammed Imran
4. Course outcomes
On completion of the course the student will be able to
CO1: Model studies and thermodynamics analysis of turbomachines.
CO2: Analyse the energy transfer in Turbo machine with degree of reaction
and utilisation factor.
and utilisation factor.
CO3: Classify, analyse and understand various type of steam turbine.
CO4: Classify, analyse and understand various type of hydraulic turbine.
CO5: Understand the concept of radial power absorbing machine and the
problems involved during its operation.
Dr. Mohammed Imran
5. Module-5
Centrifugal Pumps: Classification and parts of centrifugal
pump, different heads and efficiencies of centrifugal
pump, Theoretical head – capacity relationship, Minimum
speed for starting the flow, Maximum suction lift, Net
positive suction head, Cavitation, Need for priming, Pumps
in series and parallel. Problems.
in series and parallel. Problems.
Centrifugal Compressors: Stage velocity triangles, slip
factor, power input factor, Stage work, Pressure
developed, stage efficiency and surging and problems.
10 Hours
Dr. Mohammed Imran
6. Text Books:
An Introduction to Energy
Conversion, Volume III,
Turbo machinery, V.
Kadambi and Manohar
Prasad , New Age
International Publishers,
reprint 2008.
Dr. Mohammed Imran
International Publishers,
reprint 2008.
Turbo Machines, B.U.Pai ,
Wiley India Pvt, Ltd , 1st
Edition.
Turbo machines, M. S.
Govindegowda and A. M.
Nagaraj , M. M.
Publications, 7Th Ed, 2012
8. MODULE-5 PART – A
CENTRIFUGAL PUMPS
[AS PER CHOICE BASED CREDIT SYSTEM (CBCS) SCHEME]
SEMESTER – V
Dr. Mohammed Imran
9. Module-5
Introduction to Pumps
Hydraulic machine which convert mechanical energy
into hydraulic energy are called pumps.
The Hydraulic energy is in the form of pressure
energy .
energy .
Pumps are also called as power absorbing
Machine. There are two types
Centrifugal pumps
Reciprocating Pumps
Dr. Mohammed Imran
10. Working principal of a centrifugal pump
The working principal of a centrifugal
pump.
The liquid to be pumped enters the centre
of the impeller which is known as eye of the
pump and discharge into the space around
1. Centrifugal pump
Centrifugal pumps converts mechanical energy by means of
centrifugal force acting on the fluid.
Dr. Mohammed Imran
pump and discharge into the space around
the casing and hence filling the space.
Due to the rotation of the impeller inside
the pump casing a forced vortex is set up
which imparts pressure head to the liquid
purely by centrifugal action.
The pressure head developed by
centrifugal action is entirely by the velocity
imparted to the liquid by rotating impeller
and not due to any displacement or impact.
Thus the mechanical action of the pump is to
impart velocity to liquid so that its speed is
enough to produce necessary centrifugal
head for discharging.