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 | December, 2015 | |
| City, State | new delhi, |
Question Paper
Discuss the aerodynamic design process of axial flow compressor.
Explain the working principle of Ramjet engine, with the help of a neat diagram.
Describe the ignition system of a jet engine, with a neat sketch.
Explain the principle of jet propulsion. Describe how the jet propulsion engines are classified.
What is meant by thrust? Derive the expression of thrust for a general propulsion system.
Prove that for a one-dimensional steady isentropic flow through nozzle
where symbols carry usual meaning.
Explain the characteristics of a good fuel of a jet engine.
Derive an expression for CL and CD with and without friction in case of axial compressor.
5. An axial compressor stage has the following data:
Degree of reaction: mean blade dia 36 cm, rotational speed 18000 rpm, blade height at entry 6 cm, air angles at rotor and stator exit: axial velocity 180 work done factor: 0.88, stage efficiency: 0.85, mechanical efficiency: 96·7%.
Determine:
Air angles at rotor and stator entry
Mass flow rate
Power required
Stage loading coefficient
Pressure ratio developed by stage
Relative Mach number at rotor entry
6. A turbojet is flying with a velocity of 320 m/s at an altitude of 9150 where the ambient conditions are 32 kPa and 32°C. The pressure ratio across the compressor is 12, and the temperature at the turbine inlet is 1400 K. Air enters the compressor at a rate of 40 and the jet fuel has a heating value of 42,700 kJ/kg. Assuming ideal operation for all components and constant specific heats for air at room temperature, determine:
the temperature and pressure at inlet turbine exit,
the velocity of the exhaust gases,
the propulsive power developed,
the propulsive efficiency, and
the rate of fuel consumption.
7. Write short notes on any four of following:
Air cooling system
Turbojet with after burner
Diffuser in subsonic flow
Fuel injection system
Pollution in combustion system
Knocking
Explain the working principle of Ramjet engine, with the help of a neat diagram.
Describe the ignition system of a jet engine, with a neat sketch.
Explain the principle of jet propulsion. Describe how the jet propulsion engines are classified.
What is meant by thrust? Derive the expression of thrust for a general propulsion system.
Prove that for a one-dimensional steady isentropic flow through nozzle
where symbols carry usual meaning.
Explain the characteristics of a good fuel of a jet engine.
Derive an expression for CL and CD with and without friction in case of axial compressor.
5. An axial compressor stage has the following data:
Degree of reaction: mean blade dia 36 cm, rotational speed 18000 rpm, blade height at entry 6 cm, air angles at rotor and stator exit: axial velocity 180 work done factor: 0.88, stage efficiency: 0.85, mechanical efficiency: 96·7%.
Determine:
Air angles at rotor and stator entry
Mass flow rate
Power required
Stage loading coefficient
Pressure ratio developed by stage
Relative Mach number at rotor entry
6. A turbojet is flying with a velocity of 320 m/s at an altitude of 9150 where the ambient conditions are 32 kPa and 32°C. The pressure ratio across the compressor is 12, and the temperature at the turbine inlet is 1400 K. Air enters the compressor at a rate of 40 and the jet fuel has a heating value of 42,700 kJ/kg. Assuming ideal operation for all components and constant specific heats for air at room temperature, determine:
the temperature and pressure at inlet turbine exit,
the velocity of the exhaust gases,
the propulsive power developed,
the propulsive efficiency, and
the rate of fuel consumption.
7. Write short notes on any four of following:
Air cooling system
Turbojet with after burner
Diffuser in subsonic flow
Fuel injection system
Pollution in combustion system
Knocking
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