Reg No.: Name:

Max. Marks: 100

1 2)
0)
2 9)
0)
3 a)
0)
4 a)
0)
5 a)
0)

APJ ABDUL പ്രാധാ UNIVERSITY

Sixth Semester B.Tech Degree Regular and Supplementary Examination July 2021

Course Code: ME364
Course Name: TURBOMACHINERY

PARTA
Answer any three full questions, each carries 10 marks.
Classify turbomachines.
What is mass flow capacity and blade Mach number? Explain the physical
significance of each.
Explain principle of physical similarity.
Define Specific Speed. Explain how Specific Speed facilitates selection of a

turbo machine.

For the same pressure ratio and total to total efficiency stage work done is
depended namely on initial temperature To; or 11. Justify?
Derive the various components of energy transfer in a turbo machine. Explain

each component of energy transfer.

Derive an expression for polytropic efficiency n, as a function of stage
efficiency നും, for a compressor.
Preheat factor is always less than 1. Justify.
PART B
Answer any three full questions, each carries 10 marks.
Prove that flow through the vaneless space in a centrifugal fan is a free vortex
flow.
A centrifugal blower with a radial impeller produces a pressure equivalent to
100 cm column of water. The pressure and temperature at its entry are 0.98 bar

and 310 K. The electric motor driving the blower runs at 3000 rpm. The

Page 1 of 3

Duration: 3 Hours

Marks

(5)
(5)

(5)
(5)

(5)

(5)

(5)

(5)

(5)

(5)