This is a special link page for an Engine Design Article published in Race Engine Technology
In a recent series of articles, in issues 2 and 3 of the influential Race Engine Technology magazine, the authors Prof. G.P. Blair (Prof. Blair & Associates) and Melvin Cahoon (Volvo-Penta of the Americas) discuss The Design Parameters for Airbox Restrictors in Race Engines.
They used several software packages (4stHEAD, VIRTUAL 4-STROKE and FLUENT) very extensively in the creation of the entire data for a one litre racing engine for this design discussion and show such output data in the form of pressure, particle velocity or mass flow rate at significant crankangle locations within the engine and its ducting throughout the engine cycle.
Such data are single instantaneous snapshots taken from the entire data computed over the 720 crankangle of the complete engine cycle. It is possible to show such data as a movie, but obviously not within a magazine article. Some of the movies that the authors used in obtaining their snapshots for the Figures for the design discussion in the magazine are uploaded on to this website.
They are either GIF files of the VIRTUAL 4-STROKE output or GIF files for the CFD output from the FLUENT software. They are clearly marked and titled in the list below. The full relevance of what you are looking at will only be apparent if you have read the article in issue 2 of the Race Engine Technology magazine.
VIRTUAL
4-STROKE GIFs:
Pressure
- Unrestricted Pipe - 9000rpm (416 kb)
Pressure - Unrestricted
Pipe - 12000rpm (339 kb)
Pressure - Unrestricted
Pipe - 15000rpm (276 kb)
Mach
Number - Unrestricted Pipe - 9000rpm (212 kb)
Mach Number - Unrestricted
Pipe - 12000rpm (196 kb)
Mach Number - Unrestricted
Pipe - 15000rpm (168 kb)
Pressure
- Restricted Pipe - 9000rpm (419 kb)
Pressure - Restricted
Pipe - 12000rpm (390 kb)
Pressure - Restricted
Pipe - 15000rpm (276 kb)
Mach
Number - Restricted Pipe - 9000rpm (237 kb)
Mach Number - Restricted
Pipe - 12000rpm (225 kb)
Mach Number - Restricted
Pipe - 15000rpm (173 kb)
FLUENT
CFD GIFs:
Mach
Number - Straight Pipe - 9000rpm (114 kb)
Mach
Number - 90deg Bend - 9000rpm (193 kb)
Mach Number - 90deg
Bend - 12000rpm (124 kb)
Pressure- Straight
Pipe - 9000rpm (83 kb)
Pressure - 90deg Bend
- 9000rpm (116 kb)
Pressure - 90deg Bend
- 12000rpm (79 kb)
©Prof Blair & Associates 2020
