Post by wolfdragon on Jul 16, 2013 15:24:19 GMT -5
I finally got some free time to play around in CAD with my combustor design again and I had an odd thought...
The tried and true method for getting our hole sizing is a simple round hole, bellmouthed, and possibly diverted a bit to promote swirl in the primary zone... all well and good, it works great!
So in my effort of trying to figure out how to use a strip as a restrictor plate for my evap numbers, the possibility of bellmouthing became difficult due to the desired short length in comparison to the hole sizes (holes would be in the realm of 50-75% of the width of the strip.
This got me thinking, surely there would be a way to put the area restriction in that wouldn't involve cutting large holes or trying to pattern and bellmouth a lot of little ones, then it dawned on me...
Materials aside for the moment, what if one were to intentionally oversize the holes and then cover them with a wire mesh cloth?
Obviously if you used a superfine mesh, even if it had say 75% free open space, that would be quite draggy and wouldn't let the flow through in an efficient manner (low depth of penetration into the liner). But what about a more "proper" size with a coarser mesh of cloth, would the result be the same as a large bellmouthed hole in terms of flow?
What if the liner was constructed in such a way that the three zones were nothing more than gaps with a span of wire cloth to set the amount of open space over the whole area?
(Obviously there are design considerations needed to take care of making sure the liner itself was structurally sound...)
All material/construction issues aside, has anyone ever played with or thought about using wire cloth to set the open areas of the combustor liner?
www.mcmaster.com/#wire-cloth/
The tried and true method for getting our hole sizing is a simple round hole, bellmouthed, and possibly diverted a bit to promote swirl in the primary zone... all well and good, it works great!
So in my effort of trying to figure out how to use a strip as a restrictor plate for my evap numbers, the possibility of bellmouthing became difficult due to the desired short length in comparison to the hole sizes (holes would be in the realm of 50-75% of the width of the strip.
This got me thinking, surely there would be a way to put the area restriction in that wouldn't involve cutting large holes or trying to pattern and bellmouth a lot of little ones, then it dawned on me...
Materials aside for the moment, what if one were to intentionally oversize the holes and then cover them with a wire mesh cloth?
Obviously if you used a superfine mesh, even if it had say 75% free open space, that would be quite draggy and wouldn't let the flow through in an efficient manner (low depth of penetration into the liner). But what about a more "proper" size with a coarser mesh of cloth, would the result be the same as a large bellmouthed hole in terms of flow?
What if the liner was constructed in such a way that the three zones were nothing more than gaps with a span of wire cloth to set the amount of open space over the whole area?
(Obviously there are design considerations needed to take care of making sure the liner itself was structurally sound...)
All material/construction issues aside, has anyone ever played with or thought about using wire cloth to set the open areas of the combustor liner?
www.mcmaster.com/#wire-cloth/
