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Find us on Facebook rejinpaul.com 202,202 people like rejinpaul.com. Facebook social plugin Like GOOGLE+ BADGE RejinPaul + 11,994 Follow +1 AE2353 Wind Tunnel Techniques Anna University question bank, previous year question paper and important 2marks and 16 marks questions PART – A (10 x 2 = 20) Answer All the Questions 1. Define Reynolds number? 2. Define Mach number? 3. What is meant by subsonic and transonic speed regime? 4. Define critical Mach number? 5. Name any two equipments used in the calibration of wind tunnels. 6. What is meant by LDA? 7. What is meant by PIV? 8. Name any two equipments used for the measurement of force? 9. How are the surface streamlines and turbulence measured in wind tunnels? 10. What is the technique adopted to visualize Shock waves. PART – B (5 x 16 = 80) Answer All the Questions 11. Explain the Buckingham’s Pi Theorem. (or) 12. Briefly discuss the scale effects of similarities. 13. Discuss the classification of wind tunnels in detail. (or) 14. Explain with a neat diagram the layout of a subsonic wind tunnel. 15. Explain the techniques used for Turbulence measurements in a wind tunnel. (or) 16. Explain in detail the calibration of a supersonic tunnel. 17. Explain with a neat sketch the working of a hot wire anemometer. (or) 18. Briefly explain the measurement of pressure, velocity and force in a wind tunnel. 19. Discuss the smoke and tuft grid techniques used for flow visualization. (or) 20. Briefly explain the optical methods used for flow visualization. PART A (10 X 2 = 20) Answer ALL the Questions 1. Explain the term dynamic similarity. 2. Define Mach number. 3. Define laminar and turbulent flow. 4. What are the classifications of wind tunnel? 5. Name any two equipments used in the calibration of wind tunnels. 6. Define horizontal buoyancy. 7. What is meant by LDA? 8. Name any two equipments used for the measurements of velocity. 9. How are the surface streamlines and turbulence measured in wind tunnels? 10. What is meant by PIV? PART – B (5 x 16 = 80) Answer All the Questions 11. Explain the Buckingham’s Pi theorem. (or) 12. Explain the dynamic similarity between a wind tunnel model and the prototype to be flighttested. What are the essential conditions to be satisfied for the results to be carried from the model to the prototype? Are there any limitations or preconditions involved? 13. What is understood by the term low speed wind tunnel in aerodynamic testing? Describe with brief details through sketches and plots, various types of low speed wind tunnels based upon the details of the flow in test section. (or) 14. Write notes on: Apply Credit Card Online Get Cash Back, EMI Offers and More Apply Best Credit Card Now! HOME GATE Anna University SCHOOLS TANCET 2015 EVENTS Important Questions Job Portal Contact Us Search here....

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Page 1: AE2353 Wind Tunnel Techniques Anna University Question Bank, Previous Year Question Paper and Important 2marks and 16 Marks Questions _ Tamil Nadu 10th 12th Study Materials Results

05/03/2015 AE2353 Wind Tunnel Techniques Anna University question bank, previous year question paper and important 2marks and 16 marks questions | Tamil …

http://www.rejinpaul.com/2010/12/ae2353­wind­tunnel­techniques­anna.html 1/3

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rejinpaul.com

202,202 people like rejinpaul.com.

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AE2353 Wind Tunnel Techniques Anna University question bank,previous year question paper and important 2marks and 16marks questions

                                                PART – A                               (10 x 2 = 20)Answer All the Questions

1.         Define Reynolds number?2.         Define Mach number?3.         What is meant by subsonic and transonic speed regime?4.         Define critical Mach number?5.         Name any two equipments used in the calibration of wind tunnels.6.         What is meant by LDA?        7.         What is meant by PIV?8.         Name any two equipments used for the measurement of force?9.         How are the surface streamlines and turbulence measured in wind tunnels?10.       What is the technique adopted to visualize Shock waves.

PART – B                               (5 x 16 = 80)Answer All the Questions

11.       Explain the Buckingham’s Pi Theorem.(or)

12.       Briefly discuss the scale effects of similarities.13.       Discuss the classification of wind tunnels in detail.  

(or)14.       Explain with a neat diagram the layout of a subsonic wind tunnel.15.       Explain the techniques used for Turbulence measurements in a wind tunnel.

(or)16.       Explain in detail the calibration of a supersonic tunnel.17.       Explain with a neat sketch the working of a hot wire anemometer.

(or)18.       Briefly explain the measurement of pressure, velocity and force in a wind tunnel.19.       Discuss the smoke and tuft grid techniques used for flow visualization.

(or)20.       Briefly explain the optical methods used for flow visualization.

PART ­ A                    (10 X 2 = 20)Answer ALL the Questions

1.         Explain the term dynamic similarity.2.         Define Mach number.3.         Define laminar and turbulent flow.4.         What are the classifications of wind tunnel?5.         Name any two equipments used in the calibration of wind tunnels.6.         Define horizontal buoyancy.7.         What is meant by LDA?8.         Name any two equipments used for the measurements of velocity.9.         How are the surface streamlines and turbulence measured in wind tunnels?10.       What is meant by PIV?

PART – B                               (5 x 16 = 80)Answer All the Questions

11.       Explain the Buckingham’s Pi theorem.(or)

12.       Explain the dynamic similarity between a wind tunnel model and the prototype to be flight­tested. Whatare the essential conditions to be satisfied for the results to be carried from the model to the prototype?Are there any limitations or preconditions involved?    

13.       What is understood by the term low speed wind tunnel in aerodynamic testing? Describe with brief detailsthrough sketches and plots, various types of low speed wind tunnels based upon the details of the flow intest section.

(or)14.       Write notes on:

Apply Credit Card OnlineGet Cash Back, EMI Offers and More Apply Best Credit Card Now!

HOME GATE Anna University SCHOOLS TANCET 2015 EVENTS Important Questions Job Portal Contact Us

Search here....         

Page 2: AE2353 Wind Tunnel Techniques Anna University Question Bank, Previous Year Question Paper and Important 2marks and 16 Marks Questions _ Tamil Nadu 10th 12th Study Materials Results

05/03/2015 AE2353 Wind Tunnel Techniques Anna University question bank, previous year question paper and important 2marks and 16 marks questions | Tamil …

http://www.rejinpaul.com/2010/12/ae2353­wind­tunnel­techniques­anna.html 2/3

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(a) setting Mach number in a transonic wind tunnel(b)  Measurements  of  turbulence  level  in  a  transonic  wind  tunnel.  Explain  the  techniques  used  forturbulence measurements in a wind tunnel.

15.       Describe the basis for the measurement of pressure and instruments used for the purpose. What are itsadvantages  and  applications?  Illustrate  with  theory  and  an  example.  It  is  desired  to  obtain  pressuredistribution of a rotating circular cylinder kept in the test section of a wind tunnel.

(or)16.       Explain in detail the calibration of a supersonic wind tunnel.

17.       Explain with a neat sketch the working of a hot wire anemometer.(or)

18.       What types of wind tunnel balances are used to ascertain forces and moments on an airplane model in alow speed wind tunnel? Hence describe the underlying principles of an external type wind tunnel balancefor measuring lift, drag and pitching moments over a finite span wing.

19.       Explain the phenomenon of separation of flow over a 2D wing with the help of liquid paraffin generatedsmoke wire technique with good sketches. What are its merits over kerosene generated smoke?

(or)20.       Briefly explain the optical methods used for flow visualization.

             PART – A                              (10 x 2 = 20)Answer All the Questions

1.         What is geometrical similarity in wind tunnel testing of models?2.         What is boundary layer correction in the test section design of  wind tunnels?3.         What is turbulence factor of a subsonic wind tunnel?4.         How is test section speed measured in case of a subsonic wind tunnel?5.         How are wind tunnel balances classified?6.         What is the basic principle involved in the interferometer method of flow visualization?7.         What are the advantages of flow visualization methods?8.         How is total pressure estimated in the test section of a super sonic wind tunnel?9.         What is horizontal buoyancy?10.       What are the limitations of dye injection method for flow visualization?

PART – B                               (5 x 18 = 60)Answer All the Questions

11.       (a) State Buckingham theorem. How is thus theorem useful in the experiments using wind tunnels?            (b) What is the basic principle behind hot wire anemometer? What are its limitations?

(or)12.       Define the following non­dimensional numbers: force coefficient, Euler number, Reynold’s number and

moment coefficient.  How do the model scale effects influence the wind tunnel test results?        13.              How  are  the wind  tunnels  classified? What  are  the  special  problems  of  testing  in  hypersonic  wind

tunnels?(or)

14.       Sketch the typical layout of a supersonic wind tunnel and mark all the components and subsystems. Whatis starting problem in supersonic tunnels?

15.       Write short notes on the following topics:                        (a) Flow angularities in wind­tunnel testing.

(b) Turbulence intensity measurements in wind tunnel test section.(or)

16.       With a neat illustration explain the objective of calibration of a wind tunnel.  In what way the calibrationprocedure for a supersonic tunnel different from that of a subsonic wind tunnel?

17.       Distinguish between internal and external wind tunnel balances. Briefly explain how force measurementsare carried out using an external strain gauge balance.

(or)18.            Bring out the essential features of a strain gauge based six component internal wind balance.  Explain

how the six components are measured using the balance.19.       With neat illustration explain the basic principles of Schelieren method of flow visualization.  What are

the advantages and limitations of the method?(or)

20.       Write short notes on the following techniques:            (a) Smoke technique for flow visualization.            (b) Use of tufts and electrical techniques for flow visualization studies.