Jerry Bauer <usenet@[EMAIL PROTECTED]
> wrote:
>On Tue, 12 Feb 2008 08:36:31 -0800, Xah Lee wrote
>(in article
><e4f83086-d630-4e8e-9b90-e54dd4c24698@[EMAIL PROTECTED]
>):
>
>> Xah Lee <x...@[EMAIL PROTECTED]
> wrote:
>>> does anyone know the answer to the question on this page?
>>>
>>> http://xahlee.org/Whirlwheel_dir/fan2.html
>>>
>>> it's about installing a fan for car radiator, whether one side is
>>> right or the other side. (hard to explain the question, pls see the
>>> photos on the page)
>>
>> Jerry Bauer wrote:
>>> It was correct the first time ...
>>
>> But what reason would you give?
>>
>> Xah
>> xah@[EMAIL PROTECTED]
>> ∑ http://xahlee.org/
>>
>> ☄
>
>I suspect that at the speed of a typical engine fan, it does not
>matter much if at all, and the blades are curved for cool appearance
>rather than cooling effect.
>
>However, for high-speed fans, such as very high-performance airplane
>propellers and turbines, the ends of the blades are traveling at
>speeds where the effect is similar to that of a swept wing on an
>airplane. Also, see some boat propellers, like this one:
>
>http://stilgherrian.com/wp-content/uploads/2007/09/subprop.jpg
But the fan was "cowled". Does the swept shape do anything in a
cowled fan? Jet engine blades are straight.
Modern plane wings are "cowled" (wingtip flanges) but still swept.
--
Tomorrow is today already.
Greg Goss, 1989-01-27
|
