12

13
14

a)

b)

00000ME409121905

hydrocarbon fuel are as follows: velocity of air-fuel mixture = 73 m/s, static
temperature = 333 K, static pressure = 0.55 bar. The heat of reaction of the
fuel-air mixture is 1400 kJ/kg. Assuming that the working fluid has the same
thermodynamic properties as air before and after combustion, calculate

i) the lost in stagnation pressure due to heat addition

ii) the maximum heat of reaction for which flow with the specified initial
conditions can be maintained.

When does a shadowgraph preferred over a Schlieren system in studying
density effects? Mention the difference in principle of the two instruments.
With the help of a neat sketch explain the working of an interferometer.

Explain the working of a shock tube with neat sketch.

Describe with the aid of a schematic diagram the working of a closed circuit

supersonic wind tunnel.

بد بد بد ‎मे‏

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