aukap
Member
Joined: January 2015
Posts: 14 
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Post by aukap on May 2, 2015 9:10:19 GMT -5
Hi Guys,
Carrying forward fron the general jet and turbine discussion.I am a final year mechanical engineering student.
The following build thread is of a gas turbine project based on a 55/83 compressor and 70/58 turbocharger. The build will be sort of "heavy duty?" since i don't want any combustion problems due to less time i have for sorting out the problems later on.
Aukap
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aukap
Member
Joined: January 2015
Posts: 14
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Post by aukap on May 2, 2015 9:14:24 GMT -5
So lately i have designed the flametube according to jetspecs or actually a bit oversized but the hole area and number was solely according to jetspecs.
27 x 6 mm holes in primary zone
10 x 8 mm holes in secondary zone
11 x 12 mm holes in tertiary zone.
Flametube diameter 6 inches, 12 inches long ,then 6 inches long taper and almost 6 inches rectangular tube matching the turbine inlet size.
Aukap
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aukap
Member
Joined: January 2015
Posts: 14
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Post by aukap on May 2, 2015 9:17:11 GMT -5
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Post by racket on May 2, 2015 18:05:03 GMT -5
Hi Aukap
May I suggest opening up 4 of those 6mm Primary Zone holes to 10mm so that theres turbulence getting to the centre of the flametube , have the 4 holes 90 degrees apart around the flametube so that their airjets will intersect in the centre of the flametube .
Is there a particular reason for the long rectangular snout on the flametube ??
Cheers
John
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aukap
Member
Joined: January 2015
Posts: 14
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Post by aukap on May 2, 2015 19:54:34 GMT -5
Hi John,
Maybe that snout gives me more dilution time till the gases hit the turbine wheel....
Morover that will aid in the fitment of the turbocharger to the combustion chamber with four securing bolts near the four corners.
Aukap.
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Post by racket on May 2, 2015 22:07:27 GMT -5
Hi Aukap
The gases will be travelling very quickly by the time they enter the relatively narrow passageway of the rectangular snout , there'll be minimal time for any dilution or mixing , but there will be losses of energy from the friction along that length of snout , unless its necessary for some other good reason I'd be removing at least half of it .
Cheers
John
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