IC Engines and Gas Turbines

Describe the combustion of S.I. engine and discuss the effect of fuel air ratio,compression ratio, engine load, engine speed and turbulence on flame propagation.

(a) Describe the difference between ideal and actual working cycles with diagram and applications.

(b) Describe the classification of injection system with diagrams.

(a) Compare the 'air Swirl' in Cl. engine with turbulence in S.I engines with diagrams. 

Explain principle, construction and working of turboprop engine with neat and clean diagram along with merits, demerits and applications.

(b) Explain the air fuel ratio requirements of S.I engines from no load to full load with suitable example.

(a) Explain with neat and clean diagram the working of governors.

(b) Describe the stages of combustion with neat diagram.

a) Describe the variables affecting the performance characteristics of 1.C engines.

(b) Discus the different methods of improving engine performance with suitable example.

A gas turbine cycle takes in air at 32° C and atmospheric pressure. The compression pressure ratio is 3. The compressor efficiency is 87%. The inlet temperature to turbine is limited to 623 °C. What turbine efficiency would give overall cycle efficiency zero percent? 

Short answer type questions:

a) Discuss the different types of engines.

Short answer type questions:

b) Describe fossil fuels and octane number.

Short answer type questions:

(c) What is the function of combustion chamber? Discuss the entects on intercooling with neat diagrams 

Short answer type questions:

(d) Explain the working principle of carburetor.

Short answer type questions:

(e) Explain thrust augmentation, engine efficiencies and performance characteristics.