Assignment Details –
Introduction – In this assignment you are given in-cylinder pressure data from a four-stroke single cylinder square engine using gasoline and E50 as shown in Table 1. Then, using the data the performance of these fuels needs to be compared to each other. The results are to be presented in a report and submitted to S.net. (Other operating parameters will be set: displacement volume: 148cc, compression ratio: 8.5, constant crank speed of 1800 rpm, conrod length: 62.5 mm, volumetric efficiency: 68%; stoichiometric condition for both fuels, ignition time 20 degrees BTDC.)
Table 1 A screen shot of a typical data set (5-45 degrees)
Angle(deg)
Pressure(bar)
5.000000
-5.670000
6.000000
-5.775000
7.000000
-5.775000
8.000000
-5.775000
9.000000
-5.775000
10.000000
-5.775000
11.000000
-5.775000
12.000000
-5.775000
13.000000
-5.791988
14.000000
-5.832357
15.000000
-5.775000
16.000000
-5.880000
17.000000
-5.775000
18.000000
-5.945261
19.000000
-5.784085
20.000000
-5.901569
21.000000
-5.775000
22.000000
-5.880000
23.000000
-5.985000
24.000000
-5.880000
25.000000
-5.915158
26.000000
-5.880000
27.000000
-5.906151
28.000000
-5.985000
29.000000
-5.967460
30.000000
-5.893115
31.000000
-5.923769
32.000000
-5.985000
33.000000
-5.985000
34.000000
-5.985000
35.000000
-5.985000
36.000000
-5.985000
37.000000
-5.985000
38.000000
-5.985000
39.000000
-5.985000
40.000000
-5.980341
41.000000
-5.985000
42.000000
-6.024032
43.000000
-5.985000
44.000000
-5.985000
45.000000
-5.985000
Report, article content –
Students expected to:
1. Create a research paper like document.
2. Compare the performance of gasoline and E50 (power output, Torque, SFC).
3. Show pressure curves with some analysis.
4. Obtain mass fraction burned curves.
5. Compare physicochemical properties of E50 and gasoline (ignition delay time and laminar flame speed).
The abstract – An abstract is a brief summary of a research article, thesis, review, conference proceeding or any in-depth analysis of a particular subject and is often used to help the reader quickly ascertain the paper’s purpose. The abstract must be able to stand on its own: overall aim and some details must be given, at the end of it some of the main findings should be shown.
Introduction – Introduce the reader to the followings:
1. Why is the content of the paper is important (must support your statement with references.
2. What is that the methodology, questions, proves, argues…
3. Make your contribution clear, could be a separate short section (could be analytical type with hypothesis)
Results and discussion – These can be separated or presented together depending on personal preferences and on the topic. If it’s an experimental type report then evaluation of errors is vital. This can be done separately or together with the results.
Present your findings, discuss if these meet the expectations. It is important that you cross-compare the values with some already published values.
At a master level for marks over 70, it is expected that student carry out some advanced analysis this can include:
i. statistical analysis of data and correct presentation
ii. detailed analysis of p-V diagram: imep, bmep, fmep.
iii. Heat release rate calculation from pressure curves
iv. Mass fraction burned
Conclusions – When you write a paper, you always end by summing up your arguments and drawing a conclusion about what you’ve been writing about. The phrase in conclusion means “finally, to sum up,” and is used to introduce some final comments at the end of a speech or piece of writing. It usually starts with restating the main argument, add a brief description of methodology, show your results.