Code No: RR312104

RR

SET-1

B. Tech III Year I Semester Examinations, December-2011 WIND TUNNEL TECHNIQUES (AERONAUTICAL ENGINEERING)

Time: 3 hours

Max. Marks: 80

1.a) b)

.in

Answer any five questions All questions carry equal marks --Write any three Non dimensional numbers used for Aerodynamics and their importance. Write the types of Similarities and explain each in detail with examples. [8+8]

2.a) b)

Explain and derive Buckingham theorem. What is Scale effect and how it is related to the Similarities?

3.a)

Write down the principle of low speed subsonic wind tunnel and draw the neat diagram. Explain with neat sketches the function of supersonic wind tunnel. [8+8]

or ld

b)

[8+8]

Explain the losses of subsonic wind tunnel. Explain layouts, sizing and design parameters of hypersonic wind tunnel. [8+8]

5.a)

Name the two equipments and their working principles to calibrate the flow angularity in low speed subsonic wind tunnel. How the supersonic wind tunnel is calibrated? Explain with diagrams. [8+8]

b) 6.a) b)

uW

4.a) b)

What is the purpose of calibration of wind tunnel? How the wind tunnel test section speed and horizontal buoyancy is calibrated? Write short notes on following: i) Calibration of wind tunnel. ii) Turbulence measurement. iii) Test section speed calibration. [8+8] Describe the types of wind tunnel balances and explain one with diagram. With diagram show how the lift, drag, pitching moment and rolling moment is measured by the wind tunnel balances. [8+8]

8.a) b)

Name the three pressure measuring equipments and explain one with diagram. What are the fix components measured by the wind tunnel balances? Explain how these are measured. [8+8]

Aj

nt

7.a) b)

--ooOoo--

Code No: RR312104

RR

SET-2

B. Tech III Year I Semester Examinations, December-2011 WIND TUNNEL TECHNIQUES (AERONAUTICAL ENGINEERING)

Time: 3 hours

Max. Marks: 80

1.a) b)

.in

Answer any five questions All questions carry equal marks --Write down the principle of low speed subsonic wind tunnel and draw the neat diagram. Explain with neat sketches the function of supersonic wind tunnel. [8+8] Explain the losses of subsonic wind tunnel. Explain layouts, sizing and design parameters of hypersonic wind tunnel. [8+8]

3.a)

Name the two equipments and their working principles to calibrate the flow angularity in low speed subsonic wind tunnel. How the supersonic wind tunnel is calibrated? Explain with diagrams. [8+8]

4.a) b)

What is the purpose of calibration of wind tunnel? How the wind tunnel test section speed and horizontal buoyancy is calibrated? Write short notes on following: i) Calibration of wind tunnel. ii) Turbulence measurement. iii) Test section speed calibration. [8+8]

uW

b)

or ld

2.a) b)

Describe the types of wind tunnel balances and explain one with diagram. With diagram show how the lift, drag, pitching moment and rolling moment is measured by the wind tunnel balances. [8+8]

6.a) b)

Name the three pressure measuring equipments and explain one with diagram. What are the fix components measured by the wind tunnel balances? Explain how these are measured. [8+8]

nt

5.a) b)

7.a)

b)

Explain and derive Buckingham theorem. What is Scale effect and how it is related to the Similarities?

Aj

8.a) b)

Write any three Non dimensional numbers used for Aerodynamics and their importance. Write the types of Similarities and explain each in detail with examples. [8+8]

--ooOoo--

[8+8]

Code No: RR312104

RR

SET-3

B. Tech III Year I Semester Examinations, December-2011 WIND TUNNEL TECHNIQUES (AERONAUTICAL ENGINEERING)

Time: 3 hours

Max. Marks: 80

b) 2.a) b)

Name the two equipments and their working principles to calibrate the flow angularity in low speed subsonic wind tunnel. How the supersonic wind tunnel is calibrated? Explain with diagrams. [8+8] What is the purpose of calibration of wind tunnel? How the wind tunnel test section speed and horizontal buoyancy is calibrated? Write short notes on following: i) Calibration of wind tunnel. ii) Turbulence measurement. iii) Test section speed calibration. [8+8]

or ld

1.a)

.in

Answer any five questions All questions carry equal marks ---

Describe the types of wind tunnel balances and explain one with diagram. With diagram show how the lift, drag, pitching moment and rolling moment is measured by the wind tunnel balances. [8+8]

4.a) b)

Name the three pressure measuring equipments and explain one with diagram. What are the fix components measured by the wind tunnel balances? Explain how these are measured. [8+8]

5.a)

Write any three Non dimensional numbers used for Aerodynamics and their importance. Write the types of Similarities and explain each in detail with examples. [8+8]

b)

Explain and derive Buckingham theorem. What is Scale effect and how it is related to the Similarities?

nt

6.a) b)

uW

3.a) b)

7.a)

b)

Write down the principle of low speed subsonic wind tunnel and draw the neat diagram. Explain with neat sketches the function of supersonic wind tunnel. [8+8]

Explain the losses of subsonic wind tunnel. Explain layouts, sizing and design parameters of hypersonic wind tunnel. [8+8]

Aj

8.a) b)

[8+8]

--ooOoo--

Code No: RR312104

RR

SET-4

B. Tech III Year I Semester Examinations, December-2011 WIND TUNNEL TECHNIQUES (AERONAUTICAL ENGINEERING)

Time: 3 hours

Max. Marks: 80

.in

Answer any five questions All questions carry equal marks --Describe the types of wind tunnel balances and explain one with diagram. With diagram show how the lift, drag, pitching moment and rolling moment is measured by the wind tunnel balances. [8+8]

2.a) b)

Name the three pressure measuring equipments and explain one with diagram. What are the fix components measured by the wind tunnel balances? Explain how these are measured. [8+8]

3.a)

Write any three Non dimensional numbers used for Aerodynamics and their importance. Write the types of Similarities and explain each in detail with examples. [8+8]

b)

or ld

1.a) b)

4.a) b)

Explain and derive Buckingham theorem. What is Scale effect and how it is related to the Similarities?

5.a)

Write down the principle of low speed subsonic wind tunnel and draw the neat diagram. Explain with neat sketches the function of supersonic wind tunnel. [8+8]

uW

b)

[8+8]

6.a) b)

Explain the losses of subsonic wind tunnel. Explain layouts, sizing and design parameters of hypersonic wind tunnel. [8+8]

7.a)

Name the two equipments and their working principles to calibrate the flow angularity in low speed subsonic wind tunnel. How the supersonic wind tunnel is calibrated? Explain with diagrams. [8+8]

nt

b) 8.a)

Aj

b)

What is the purpose of calibration of wind tunnel? How the wind tunnel test section speed and horizontal buoyancy is calibrated? Write short notes on following: i) Calibration of wind tunnel. ii) Turbulence measurement. iii) Test section speed calibration. [8+8]

--ooOoo--