Blower housing shape experiments
ฝัง
- เผยแพร่เมื่อ 26 มี.ค. 2017
- Experimenting with wat shape of housing works best for a centrifugal blower, measuring airflow, efficiency, and pressure.
More at: woodgears.ca/dust_collector/ho... - แนวปฏิบัติและการใช้ชีวิต
![พบรัก - INK WARUNTORN [Official MV]](http://i.ytimg.com/vi/n2wjOYVC38Y/mqdefault.jpg)
I learned with my solar thermal experiments that static pressure is as important as airflow when it comes to accomplishing work efficiently. Few channels do experimentation like this, not as many clicks as crushing things in a press or blowing it up I guess, but I appreciate the data. Very useful. Thanks!
Static (back) pressure is one of the most valuable data points even for PC coolers but is the most overlooked as well.
Most channels can't analyze data, and don't want anything but money.
Never claimed to be smart bud. Just pointing out that though most of the gen public would find this boring, I and likely most of Matthias's subs appreciate the extra effort to show exactly why one configuration is better than the other. Everyone owns a channel for different reasons: some informative, some entertainment, some for clicks and $, some just to goof around. I think (almost) everyone can be as smart as they choose - most people seem to be pretty clever when they want to be...
high cfm fans are good for cases, high static pressure fans are good for heatsinks.
@@satibel Best cooling came from a Siemens i used to own. All the fans were oriented towards high static pressure. Temps never rose above 50C in any of the stages of use, regardless of how much number crunching i was giving it, but then again Siemens used to make some bitching portable server cases, with airflow in mind (haven't used on in many years, having gone to liquid cooling).
I love these kinds of videos. Such a great way to get intuition - just do a bunch of tests.
Experiments ✓
Mean comment regarding drills ✓
Mean comment about "pedantic types" ✓
Yeah. We're definitely home.
"To the pedantic types"! 😁 Thanks for sharing this experiments, Matthias. This kind of videos are one of the reasons why I like your channel
Dittos :)
Javier Castro I felt strangely pedantic after I watched
Mathias, thank you for doing my job for me! I was about to conduct a very similar test but this confirms my suspensions and will help my project get along faster. Thank you for your channel!
Remember kids, the only difference between Science and Screwing Around... is writing it all down!
I love this comment! :D
awe
You forgot the statistics in the science department! You need a repetition of 4-5 (maybe 20) depending on the Power you want/reduction of non-systematic errors/outliers and to achieve some sort of normal distribution of the recordings. Then you may call this an experimental Science video, not just a Screwing Around demonstration video.
((but this calls for building a zillion blower houses -- I didn't count the configurations/designs/ie treatments he made so I'm guesstimating -- but then, Matthias isn't the pedantic type, unlike me))
so true
i was about to say that XD
...quoting Adam Savage without giving credit, I see...
You inspired me in my "this is NOT a propeller video" and this one is great as well
Amazing work Matthias, excellent video.
I love your vids, Matthias...mainly because you make me think about things in my workshop that I never knew I had to think about. Thanks for keeping me on my toes!
Matthias, excellent explanation of CFM vs. Static Pressure!
I love Matthias' dust collector videos the best! They changed my life.
Awesome explanation. I love these blower/dust collection videos, it gives so much insight for when I build my own from scratch ...some day.
If anyone ever wanted a true definition of "Research and Development, they would only need to see this current video of yours. I for one find your videos extremely fascinating, and I have learned a lot. Thanks Matthias!
Hi Mathias. Thanks for the great videos on blowers. Your timing, for my shop, was right on the money. Rod Vancouver Island
This was a really informative video Matthias. Thanks for making it and other ones like these! It doesn't seem to matter what topic you chose (wood, shop, home, camp, random) I always enjoy your style and learn something. Please keep making them!
Thank you Matthias. Another very informative video.
Fantastic tests, Matthias. Thank you.
Thank you for doing these tests. It definitely helps in making decisions on things to purchase and how big of a motor to include. Fascinating....
As someone who worked in the heating and ventilation industry for years, this was cool to see, good job!
I'm just starting to design my new shop and my dust extraction system is a top priority. This test will actually help me make some piping and hose decisions. Thanks.
I'm not a woodworker myself, but for some reason I just love your videos and can't stop watching them!
I remember asking for this video on a comment you left on the applied science channel. This was very interesting and surprisingly educational.
perhaps add smooth hose versus flexible/concertina hose to your comparison chart... tho that then brings in a whole new discussion about surface/laminar flow :)
These hoses are actually quite smooth inside. Besides, wobbly surface could have better performance, especially for curved paths. Watch Mythbusters video about golf ball aerodynamics, they've explained it quite throughly.
Even if that's the case, that may change when you add dust and other debris to the airflow.
thinking that too
Woo, that would be neat. IIRC you can get laminar flow by just putting in a whole bunch of straws in a lattice.
These last two vids have been so informative and helpful (repeating myself?). Once and engineer, always an engineer.
Very useful information, and much appreciated demonstrations of things that, as you mentioned, are counter-intuitive. Thanks!
FANtastic. Oops, did I just write that?
Your work with these systems is amazing, and I am sure we are all learning something new with each experiment you perform.
I am so gonna try making one of these in the very near future.
Keep up the good work.
Thank you for the best explanation of how much air loss happens with dust collection systems.
Very useful information and great detail! Thanks for taking the time to share this. I am making a localized fume fan for welding and had questions that your video answered quite well! Thank You!
Thanks for the video. Extremely interesting. Can't wait see what you test next with this setup.
Great experiments. Really enjoyed watching this.
Great, now my lungs are cleaner... but my ears are dead...
These are my favorite kinds of videos from you!
Thanks for performing the experiments.
The results are very interesting.
Brilliantly illustrated!
Nice and very useful experiments. Thank you for sharing!
Thanks very much for this Matthias. I have worked on industrial dust collection/ air movement systems my whole career and i have seldom seen these sometimes counter intuitive engineering principles explained so clearly. Well done, you have a way with words (and video). Forget the pedantic types, I suspect most of your viewers, like myself, don't have any time for them either... aren't they first cousins to trolls on the evolutionary tree?
nice, really enjoyed the series. Was going to do something similar to continue building the dust collector, but don't have enough time. Thanks for doing the experiment for me :)
Brilliant! - Very illustrative and informative.
Very nice explanation, good work!
I think that these experiments you do are way more interesting than your standard (but still immensely interesting) videos.
Excellent experiment! Very interesting. You've taught me something new, sir!
I really like experiments. Thanks for sharing yours!
I have no dust collector because I ussually do woodworking outdoor. I have no skills on building this machines. I do not have those measurement instruments... but, I'm engineer, I do woodworking... and enjoy like a kid with this kind of videos. Thanks!
Since you keep mentioning noise I'd love to see you do an experiment with asymmetrically-spaced blades and an explanation of the effect on noise. (Awaiting classic Matthias response "Nah, too much trouble, just wear ear protection")
Favorite channel on youtube - thanks for the great videos!
fantastic experiment and implementation
thanks for taking the time to come up with this data.
Cool video! I want to try this myself.
Very interesting, this has been very helpful thanks for a great video.
very impressive and practical experiments. Thanks for sharing.
One of your best videos!
I really appreciate your scientific method!!
Wow, this was intense. Very educational.
Great info for dust collector projects.
7:53 Places "junk" inside the cyclone, aka 'Black & Decker' ;)
Ave would approve.
Actually those are both some garbage Canadian Tire house brand.
The Black & Decker pecker wrecker...
I like black and decker I am happy with my b&d impact,drill,vacuum, and circular saw
Black & Decker air flow wrecker.
Matthias thank you I learned a ton from this video. Thanks a mill
Love the new data. I wish there was RPM data in this test too, but having the anemometer close to the inlet I agree is a much better spot. Maybe the next time you can pinch down the diffusing section axially, and have it diffusing to a bigger diameter before entering the volute.
Hi,good tutorial,I just have a shop vac on every machine,never have a problem.thanks again.from Australia.
Nicely done.
Matthius, Again a BIG THANK YOU.
The ClearVue Cyclone uses a 16 inch impeller vs. the aveage 11 to 12 something impeller. From what I've read The CFM and I'm guessing the static pressure? is increased by impeller size. You changed the restriction of air flow in the impeller which increased or decreased noise and cfm ( Imperical units LOL!) The only thing you left out of your experiment , I believe, is reducing the space from the impeller to the shrowd/housing?
I have used my own tests with an anemometer and confirmed loosing more than half the cfm that comes out of my Thein separator, which also reduces the cfm. I knew that from just listening and watching and checking suction.
My DC is an older delta 1.5 hp. Checking it out I found the impeller to be fairly straight like the old washing machine agitators The spiral experiment you did confirmed my thoughts. I'm going to re-watch your video as it helps make Bill Pentz's information more concrete.. I'd already figured I have to increase the size of my main feed and decrease the resistance of air flow by eliminating the crrigated smaller 4 " hose . Size of my motor limiting pipe size to 6 inches.
Another question or thought that came up as I examined the shroud or housing is the 6 inch connector reduces down to around 5 and a half inches. Is the venturi principle in effect and if so how?
Nice! Good example for Engineering student's final projects.
hey man im thirteen and love and watch these types of channels and you are by Farr one of the best keep up the good work👌
Fascinating, as usual.
Just excellent video ! Got all the ans. to my questions, best experiments
دائما ما تبهرنا انت مبدع جدا وانسان خلوق اتمنى لك التوفيق ❤
Since static pressure is the main limiting factor, it would be interesting to see how two impellers in series perform.
this is how most vacuum cleaners work, 3 to 6 platters stacked up in series.
Most car fans have a double inlet and a double wide impeller, mounted on a plate in the center. More parallel than series tho
Another awesome video from Matthias! The take away for me, since I want to build a leaf vac attached to my ride on mower, is just build it. for that purpose it seems like all you care about is flow and not pressure. the push lawn mower that I'll sacrifice will have enough flow for even wet leaves since I'll have the ride on mower helping. no need for special housing, just mount it on the trailer and cover with a bed sheet(like the video Matthias already made but without the housing).
any thoughts?
I have couple of ideas.
Test some variables:
Distance from lid to impeller.
Size of inlet of impeller.
Impeller with and without top ring.
Fix description:
eirflow->airflow
Moe->More
I will leave those up to you. To me, the answers to these are too obvious to warrant experiments.
We don't want answers, we want experiments.
The mob have spoken!
great video ,,,, explains a lot , the length of flex hose will probably effect it as well ,,,, seeing that the hose had the biggest resistance ,,,,, would be nice to see the resistance from 90 deg elbows and 2- 45 deg and flex pipe like for a full shop dust collection set up
Matthias, I am curious if fins had an airfoil shape if it would have any effect on the movement of air. The fins as you have them are curved rectangles and I wonder if you rounded the leading edge and narrowed the trailing edge how it would impact airflow.
Great analysis! (I'm wondering how much each foot of that corrugated hose adds to the drag? In designing my dust system how much will I gain if I plumb smooth piping as close to the tools as possible instead of relying on a flex hose for the last few feet?)
very awesome video, i learned quite a bit
That is a lot of good info! Thanks. I will have to watch this again to make sure I got it all. 😁
this is great information! Is there any chance you could test ridgid pipes (pvc or metal) +/- a few angled joints that would show the flow versus a flex line?
This is hard work. Thank you
Nice job BTW I tried your mini golf course
That was interesting. Now I need to find your video on impellers..
Have you had a look at using small splitter vanes between the leading edges of the blades? It looks like a very easy thing to add in and apparently helps with static pressure of backward bladed fans. (see "Impeller Treatment for a Centrifugal Fan using Splitter Vanes - A CFD approach" for more info)
Excellent videos
Great videos, thanks for sharing
You should try to get your hands on a blower for a small bounce house. I have one left over for my sons bounce house from when he was a little boy... thinking about making a dust collector for my sanders with it.
good experiments here. I appreciate you doing this so I only have to watch. That's a lot of work ;)
great project .well explain thank you
Nice job
Hey thank you so much! Could you link some text or experiments for number of veins in a blower? I saw your video for shape which was really useful!
I realize I am late to commenting on this video but was wondering if the shape of the cyclone matters? A lot of the commercially available cyclones are cone shaped with the exhaust at the top, where as yours is just a cylinder? Would the cone shape help push the air up towards the top and therefor decrease restrictions?
This was great!
I'm a pedant, so I looked up centrifugal force before making this comment.
Great video Matthias!
Thank you for the great demo. However I wished you also showed the change in static pressure at the outlet. For all the applications when you need to pressurise a space. Can you please show that in a future video. Only you can do it 😊
The most efficient housing would be round in shape of impeller.
And gap between housing and impeller should be just the right distance.
Good luck
This is one of my favorite of your videos. Where is the, "in this video."
have you tried making a stater? also, this should work differently when on the exhaust port vs on the intake for a pressure reading. considering your readings i would make a wheel that more closely matches your system, thinner and larger diameter. should give the benefit of having more differential pressure and less noise. but you wont have the mass flow when you disconnect the hose ect.
Hello Matthias
What a great video! I was wondering how you designed the scroll housing. I am designing a housing for my backwards impeller fan and I have no idea where to start. Is there some sort of guide that can tell me what rate the diameter should change at? I just don't understand how the sizing of the scroll is done :/
Your help would be greatly appreciated. I would love to tell you more about the project if you are open to exchanging emails :)
You should look at making a muffler for that loud dust-collector! It'd be neat
Awesome video, have you experimented with water pump impellers? Do you think you will have different results with a water pump?
Matthias, have you - by any chance - tried exchanging the 90 degree angled pipes on top of your cyclone with 2x 45 degree angled pipes?
I have watched a whole lot of videos about dust collection and some people say that the suction with 2x 45 degree angles works better than with a 90 degree angle.
I haven't had a chance to test it myself yet.
Would a smooth lacquer on everything in the airflow help reduce the air resistance? Or a pack of drinking straws somewhere to get some laminar flow going?
Thanks for sharing!
I was planning to make an heat exchanger, and doing some guestimate, I figured that the pressure was an huge factor, and caused an huge flow loss. I'm still looking for some inexpensive blowers for it, and I can't find anything with enought CFM and pressure. I might be forced to actually stack two, one on the intake and one on the outtake, just to get enought pressure... A royal PITA for sure.
So now are you going to go back and optimize the wheel size for the dish washer motor and for static pressure? And correlate that back to the flat paddle test for motor output? As in what wheel dimensions and vane count is equivalent to a paddles length. I noticed the wheel you built here, under loads the motor some. Also what is the correlation in wheel thickness - diameter - center hole, dimensions. Me having a couple of those motors sitting around has nothing to do with these questions. :)
Awesome video! every day is a school day!