Gallery, Projects and General > The Design Shop
Daft idea? Flash steam engine..
vtsteam:
Hey, very cool engine John! :bow:
I have no doubt that if you set your mind to build whatever the heck is in it, it will be built! :smart:
John Hill:
--- Quote from: vtsteam on February 27, 2013, 05:10:06 PM ---
I have no doubt that if you set your mind to build whatever the heck is in it, it will be built! :smart:
--- End quote ---
Thanks, however the various daft ideas tend to get overtaken by others before they see the light of day.
Weston Bye:
I recall seeing an article on just such an engine in an old issue of ....Model Engineer, I believe. 'Twas exactly as you describe. I will see if I can find it in my archives.
picclock:
Hi John
Just my two penneth. I think the problem you have to overcome is the interface between the copper and the water. Under normal circumstances as soon as the water is changed to steam, that forms an insulating layer which prevents the rest of the water from flashing into steam. Probably the simplest way to get around this is to use a spray bar such that when the water is injected only small droplets get to touch the copper, however the problems of jet blockage due to scale would likely become an issue. Also the volume into which they are being sprayed would have to be quite small to ensure good droplet contact.
An alternative, which may make it more novel, would be to spin the heated cylinder and allow the forces of rotation to throw the higher density liquid part onto the walls promoting rapid flashing into steam. If the flash chamber was rotating it would mean that timing of the water injection could be linked to a cutout in the flash chamber. Just a thought ..
Best Regards
picclock
John Hill:
Hi Picclock, I am hoping that by injecting the water into a large diameter passage stuffed with random packed fine wires I can get a large surface area and somewhat break up the effect of the insulating layer of steam you mentioned.
Descaling if required would be a simple matter of picking out the wire and replacing it with new.
Right now I am busy making towbars for the aircraft in our aviation museum. :coffee:
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