One of main drivers of fan shroud design is Noise, Vibration, and Harshness (NVH) requirements without compromising the main function of airflow for cooling requirements. NEVER use the radiator as a ground. Electrolysis can …
If you have a fan shroud, the position of the fan blades in the shroud is very important to maximize airflow. In addition, there is also a minimum stiffness requirement of fan shroud which is often overlooked in arriving at optimal design of it. But, consider this - at idle or cruising … Air & Fuel. How To Design & Build A Fan Shroud Browse Two Minute Tech Categories.
No fan at all wasn't an option-the radiator boiled over when I returned from a quick blast around the block when I fitted the new Pertronix distributor and coil-leaving an electric fan as one of the few options. All shrouded fans should be on the engine side, no exceptions. I knew it would probably only be a temporary fix, as a new, larger radiator is most likely the real answer, but I wanted to see what difference it would make. Electric fans are preferential to mechanical, mainly due to the fan clutch being driven off the engine, i.e., no mechanical power draw when the fan kicks on.
Mounted on the engine side of the radiator, a pull fan does not interfere with airflow at highway speeds. Also a generic pulse representing low speed impact conditions up to 16 km/h has been recommended as the loading pulse. Answer: Sometimes a curved fan is better than a straight fan, but not always.
Check out these great tips in the Air & Fuel Category. Some fans can be used as either a pusher or puller. Sure, I'm in a fortunate position in that I could go to a number of friends' shops and use their equipment, but I wanted to show that such a project could be tackled at home with no specialized tools and still turn out a decent-looking, finished piece of work.I always knew the radiator in my truck was a little on the small side, and coupled with the fact that it sits so low compared to the motor, an engine-driven fan wouldn't even cover half the radiator core. Finally, an effective design guideline has been proposed as a requirement in designing a fan shroud to eliminate damage due to inertial movement of fan motors in low speed impacts. In addition to vehicle level simulations used to guide the fan shroud design, this paper describes how a sub system level simulations and testing under low speed impact loading conditions can be used to predict contact between fan motors mounted on fan shroud and radiator. Ideally I'd like to run two electric fans, but as you'll see, the steering box on my Caprice front clip sits up against the lower left corner of the core, meaning there wasn't enough space for two, so I sourced a low-profile 12 1/8-inch fan from Flex-a-lite which requires only 2 5/8 inches clearance, mounted it to the radiator, and set out for Bonneville on our recent tour.While the engine ran at 200 degrees throughout the trip, the radiator only got very hot twice in traffic, and both times the air temperature was way over 100 degrees. Check out this custom fan shroud for an editors 1946 roadster pickup using simple tools that can be found at home inside Rod & Custom Magazine.
In this paper, the design development of fan shroud using CAE and testing has been illustrated.
A fan without a shroud is better than no fan. And did it?
Preference should be given to a "pull" vs. a "push" fan. Looking from the side of the engine, the fan blades should be half in and half out of the shroud. Need tips on tuning your carburetor, converting your vehicle to propane fuel, or just need help installing your cold air kit?
Low Speed Damageability (LSD) assessment of an automotive vehicle is about minimizing the cost of repair of vehicle damages in low speed crashes. If you have space issues, you can use an electric fan in a pusher configuration in front of the radiator.
So designing fan shroud for low speed damageability is of importance today. An engine cooling system in an automotive vehicle comprises of heat exchangers such as a radiator, charge air cooler and oil coolers along with engine cooling fan. Always use the right shroud with your fan. In low speed accidents, these fan motors are subjected to sudden decelerations which cause fan motors to swing forward thereby damaging the radiator core. On my return, however, my first project was to fabricate a shroud in an attempt to lower the running temperature. Shrouding. A fan shroud helps improve cooling by …
Elsewhere in this issue you can see how the guys at Walden Speed Shop repaired a '32 coupe using a minimum of specialized equipment, most of which a well-equipped home shop will already have, especially if the shop owner already has some sheetmetal fabrication experience, but what if you don't possess a sheetmetal brake or shear?This was the position I found myself in when I needed to fabricate a custom fan shroud for my '46 roadster pickup.
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