Exam Details
| Subject | Aerodynamics- 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
1. Attempt any four of the following:
What is a detached shock wave? When is it formed? Explain in brief.
Detail any two important differences between shock waves and expansion waves in a supersonic flow.
How is laminar flow airfoil geometry different from a conventional airfoil Describe in brief.
Explain the formation of wingtip vortices.
An airplane is flying at 3·0 Mach at an altitude, where the pressure and temperature are respectively 0.5 atm and -20°C. Calculate the pressure and temperature at the leading edge of the wing.
2. Derive the relationship for the ratios of stagnation pressure to static pressure and Mach number for an isentropic flow. Derive the similar relations for temperature and density ratio.
What are the flow losses that are suffered by a compressible flow in variable area ducts How does the back pressure affect the losses
Air flows isentropically through a divergent passage of initial area 7 cm^2. If inlet conditions are M1 1·4, P1 1 atm, T1 =27°C and exit Mach No. M2 =3·0. Find
the mass flow rate,
exit pressure, and
exit area.
What is an Expansion Hodograph What is its use in supersonic aerodynamics?
A supersonic stream of air at M T1 =300 K and P atm passes through a sudden convex corner and then a sudden concave corner of turning angle of 12° each. Determine the Mach number, temperature and pressure of flow downstream of the concave corner.
Why is a golf ball dimpled? Explain.
A thin plate of length 1 m and width 1 m is moving in air along its length at a speed of 50 m/s. Calculate the total skin friction drag on the plate assuming sea level conditions.
6. State Biot-Savart law and derive an expression for the velocity induced by an infinite vortex filament at a point, which is at a distance from the filament.
Derive a general expression for the speed of sound in a compressible gas.
Air at 30°C and 1 atm is drawn through a C-D nozzle, which discharges into a large vacuum tank. Determine the conditions upstream and downstream of a normal shock, which is located at the nozzle exit. The nozzle throat and exit areas are 0·025 m^2 and 0·0724 respectively.
8. Explain in brief the superiority of lifting surface theory, for predicting lift distribution on a wing with an arbitrary platform, with the help of sketches and other representations.
9. With the help of a graph, explain the viscous interaction effect on a hypersonic flow.
What is a detached shock wave? When is it formed? Explain in brief.
Detail any two important differences between shock waves and expansion waves in a supersonic flow.
How is laminar flow airfoil geometry different from a conventional airfoil Describe in brief.
Explain the formation of wingtip vortices.
An airplane is flying at 3·0 Mach at an altitude, where the pressure and temperature are respectively 0.5 atm and -20°C. Calculate the pressure and temperature at the leading edge of the wing.
2. Derive the relationship for the ratios of stagnation pressure to static pressure and Mach number for an isentropic flow. Derive the similar relations for temperature and density ratio.
What are the flow losses that are suffered by a compressible flow in variable area ducts How does the back pressure affect the losses
Air flows isentropically through a divergent passage of initial area 7 cm^2. If inlet conditions are M1 1·4, P1 1 atm, T1 =27°C and exit Mach No. M2 =3·0. Find
the mass flow rate,
exit pressure, and
exit area.
What is an Expansion Hodograph What is its use in supersonic aerodynamics?
A supersonic stream of air at M T1 =300 K and P atm passes through a sudden convex corner and then a sudden concave corner of turning angle of 12° each. Determine the Mach number, temperature and pressure of flow downstream of the concave corner.
Why is a golf ball dimpled? Explain.
A thin plate of length 1 m and width 1 m is moving in air along its length at a speed of 50 m/s. Calculate the total skin friction drag on the plate assuming sea level conditions.
6. State Biot-Savart law and derive an expression for the velocity induced by an infinite vortex filament at a point, which is at a distance from the filament.
Derive a general expression for the speed of sound in a compressible gas.
Air at 30°C and 1 atm is drawn through a C-D nozzle, which discharges into a large vacuum tank. Determine the conditions upstream and downstream of a normal shock, which is located at the nozzle exit. The nozzle throat and exit areas are 0·025 m^2 and 0·0724 respectively.
8. Explain in brief the superiority of lifting surface theory, for predicting lift distribution on a wing with an arbitrary platform, with the help of sketches and other representations.
9. With the help of a graph, explain the viscous interaction effect on a hypersonic flow.
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