ASSIGNMENT NO. 2 AME 6TH SEM

ASSIGNMENT NO. 2

Subject: - AE – 316 Automotive Aerodynamics        Branch: - Automobile Engineering

Semester/Year: - 6^th / 3^rd                                            Lecturer: - Er. Gurpartap Singh Brar

1.      What are the methods used to decrease drag of a car?

2.      Describe the motion of the vehicle resisted by aerodynamic drag, rolling resistance and climbing resistance.

3.      What are various types of drags acting on a vehicle? Explain the effect of each type and methods to calculate the magnitude of drags.

4.      Discuss the concept of hatch back, fast back and square back for shape optimization of cars.

5.      Explain the term pressure drag of a vehicle.

6.      Write the relation between top speed, aerodynamics and engine power output of a vehicle.

7.      Under what conditions the yawing moment, a vehicle becomes aerodynamically unstable.

8.      Explain in details the optimization analysis of fore body, windshield and roof of a vehicle.

Note:- Assignment Submission Date 15.03.2013. No assignment accepted after this date.  

ASSIGNMENT 1 AME 6th sem

ASSIGNMENT NO. 1

Subject: - AE – 316 Automotive Aerodynamics        Branch: - Automobile Engineering

Semester/Year: - 6^th / 3^rd                                             Lecturer: - Er. Gurpartap Singh Brar

1.      What are different trends in aerodynamics?

2.      Explain flow phenomenon related to vehicles.

3.      What are the sources of forces and moments acting on a vehicle?

4.      Explain the development in the shape of cars starting from Camille Jenatzy in 1899 to the shapes of modern cars. Describe the features in terms of fuel efficiency, speed, luxuries.

5.      What is the effect of flow separation on a vehicle?

6.      Explain the performance of a vehicle in terms of motive force diagram, acceleration time and elasticity and specific fuel consumption.

7.      Name the parameter on which aerodynamic drag of a vehicle depends?

Note:- Assignment Submission Date 25.02.2013. No assignment accepted after this date. 

ASSIGNMENT 3 AME 4th sem

                                    ASSIGNMENT 3

Q1.  What is air standard efficiency?

Q2.  What is supercharging?

Q3.  Write demerits of under cooling?

Q4.  How engines are air cooled?  What is the purpose of fins in an air cooled systems? What is the size & spacing of fins?

Q5.    Enumerate the lubrication system & explain wet sump lubrication system within the help of neat sketch.

ASSIGNMENT 2 AME 4th sem

ASSIGNMENT 2

Q1.    Describe how hp of a multi-cylinder engine is measured?

Q2.  Explain the phenomenon of knocking in SI engine. What are different factors which influence the knocking? Describe the methods used to suppress it.

Q3. Describe with suitable sketches the following systems of a modern carburetor:

                                                            i.      Main metering system

                                                         ii.      Idling system

                                                      iii.      Economizer system

                                                       iv.      Deceleration pump system

Q4.    Explain briefly the combustion phenomenon in CI engine

Q5.    Define combustion

ASSIGNMENT 1 AME 4th sem

ASSIGNMENT 1

Q1.       Explain with suitable sketch the working of a four stroke Otto engine.

Q2.       Explain terms as to ICE

a) Bore    b) swept volume    c) stroke    d) compression ratio

e) TDC      f) piston speed       g) BDC         h) clearance volume

Q3.       A Carnot engine working cycle between 400 degree Celsius and 40 degree Celsius   produces 130kj of work. Determine

                                                            i.      The engine thermal efficiency

                                                         ii.      The heat added

                                       iii.      The entropy changed during the heat rejection process

Q4.       Describe between theoretical & actual valve timing diagrams of a diesel engine.

Q5.       What is ignition lag?

Note:- Assignment Submission Date 04.03.2013. No assignment accepted after this date.