Exam Details
| Subject | Propulsion- II | |
| Paper | ||
| Exam / Course | B.Tech in Aerospace Engineering (BTAE) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | June, 2016 | |
| City, State | new delhi, |
Question Paper
Explain the working of a turbojet engine with the help of a neat T-s diagram.
What do you understand by blade and stage efficiency?
What are the various factors that affect the combustion chamber performance Explain.
Explain any two of the following performance coefficients
Nozzle coefficient
Flow coefficient
Velocity coefficient
Why is a conical dome used in jet pipes Explain.
With a suitable sketch, explain the working principle of an axial flow compressor.
Write down the 'thrust equation' and explain the various terms used in it.
With a neat sketch, describe the flow process through a combustion chamber indicating various flow zones.
State the fundamental difference between jet propulsion and rocket propulsion.
Discuss the advantages of burning overall fuel-air mixture.
What do you understand by choking In nozzle flow?
Show that the discharge through a nozzle is maximum when there is a sonic condition at its throat.
Why are diffusers necessary in a centrifugal compressor? Explain.
What are the basic requirements of compressors for aircraft applications Do axial flow compressors meet them Explain.
8. A turbojet engine flying at a speed of 960 km/hr consumes air at a rate of 54·5 kg/sec.
Calculate:
Exit velocity of the jet when the enthalpy change for the nozzle is 200 kJ/kg and velocity coefficient is 0·97.
Fuel flow rate in kg/sec when air-fuel ratio is 75: 1.
Thrust specific fuel consumption
Thermal efficiency of the plant when the combustion efficiency is 93% and calorific value of the fuel is 45000 kJ/kg
Propulsive power
Propulsive efficiency
Overall efficiency
Write down the expression for blade efficiency of a stage of an impulse turbine with single row wheel, assuming equiangular blades.
What is the maximum efficiency at a nozzle angle of if the blade velocity coefficient is 0·83 If the blade efficiency is to be 90% of the maximum value, what are the possible ratios of the blade speed to gas speed?
10. Write short notes on any five of the following:
Flame tube cooling
Pollution in combustion system
Knocking
Afterburner
Blade cooling
Fifty percent reaction stage
Roto pressure flow coefficient
Impeller
What do you understand by blade and stage efficiency?
What are the various factors that affect the combustion chamber performance Explain.
Explain any two of the following performance coefficients
Nozzle coefficient
Flow coefficient
Velocity coefficient
Why is a conical dome used in jet pipes Explain.
With a suitable sketch, explain the working principle of an axial flow compressor.
Write down the 'thrust equation' and explain the various terms used in it.
With a neat sketch, describe the flow process through a combustion chamber indicating various flow zones.
State the fundamental difference between jet propulsion and rocket propulsion.
Discuss the advantages of burning overall fuel-air mixture.
What do you understand by choking In nozzle flow?
Show that the discharge through a nozzle is maximum when there is a sonic condition at its throat.
Why are diffusers necessary in a centrifugal compressor? Explain.
What are the basic requirements of compressors for aircraft applications Do axial flow compressors meet them Explain.
8. A turbojet engine flying at a speed of 960 km/hr consumes air at a rate of 54·5 kg/sec.
Calculate:
Exit velocity of the jet when the enthalpy change for the nozzle is 200 kJ/kg and velocity coefficient is 0·97.
Fuel flow rate in kg/sec when air-fuel ratio is 75: 1.
Thrust specific fuel consumption
Thermal efficiency of the plant when the combustion efficiency is 93% and calorific value of the fuel is 45000 kJ/kg
Propulsive power
Propulsive efficiency
Overall efficiency
Write down the expression for blade efficiency of a stage of an impulse turbine with single row wheel, assuming equiangular blades.
What is the maximum efficiency at a nozzle angle of if the blade velocity coefficient is 0·83 If the blade efficiency is to be 90% of the maximum value, what are the possible ratios of the blade speed to gas speed?
10. Write short notes on any five of the following:
Flame tube cooling
Pollution in combustion system
Knocking
Afterburner
Blade cooling
Fifty percent reaction stage
Roto pressure flow coefficient
Impeller
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
- Centre for Corporate Education, Training & Consultancy (CCETC)
- National Centre for Disability Studies (NCDS)
- School of Agriculture (SOA)
- School of Computer and Information Sciences (SOCIS)
- School of Continuing Education (SOCE)
- School of Education (SOE)
- School of Engineering & Technology (SOET)
- School of Extension and Development Studies (SOEDS)
- School of Foreign Languages (SOFL)
- School of Gender Development Studies(SOGDS)
- School of Health Science (SOHS)
- School of Humanities (SOH)
- School of Interdisciplinary and Trans-Disciplinary Studies (SOITDS)
- School of Journalism and New Media Studies (SOJNMS)
- School of Law (SOL)
- School of Management Studies (SOMS)
- School of Performing Arts and Visual Arts (SOPVA)
- School of Performing Arts and Visual Arts(SOPVA)
- School of Sciences (SOS)
- School of Social Sciences (SOSS)
- School of Social Work (SOSW)
- School of Tourism & Hospitality Service Sectoral SOMS (SOTHSM)
- School of Tourism &Hospitality Service Sectoral SOMS (SOTHSSM)
- School of Translation Studies and Training (SOTST)
- School of Vocational Education and Training (SOVET)
- Staff Training & Research in Distance Education (STRIDE)
Subjects
- Aerodynamics- I
- Aerodynamics- II
- Aircraft Design/Launch Vehicle/ Rocket Design
- Aircraft Instruments
- Aircraft Safety and Maintenance Engineering
- Aircraft Structures
- Aircraft Systems And Airworthiness Requirements
- Applied Chemistry
- Applied Physics
- Basic Control Theory
- CNS-ATM system
- Composite Materials
- Computer Fundamentals
- Engineering Drawing
- Environmental Science
- Flight Mechanics
- High Speed Aerodynamics
- Instruction To Computer Play Device
- Introduction to Aeronautics
- Introduction To Rocket And Missiles
- Mechanics Design
- Propulsion- I
- Propulsion- II
- Rocket Propulsion
- Space Dynamics
- Strength of Materials
- Technical Writing and Communication Skills
- Workshop Technology