Quote:
Originally posted by Les
Can (and have 1/4 done,somewhere) the two r (and hence two h) sums when nozzle diam approaches 3mm.
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Only done about 1/10th of sums:-
3mm nozzle 7m/s H=0.006
r=20mm=0.02m h= 25879 w/m*m*c Area= 0.00125714 sq m
r=7.5mm=0.0075m h= 51793 w/m*m*c Area=0.00017686 sq m
Total heat (r=20mm) = 32.533526 w/c
Total heat (r=7.5mm)= 9.1562625 w/c
Hence outer (0.00125714 - 0.00017686) sq m account for (32.533526 - 9.1562625) w
0.00108028sq m account for 23.37726356w
Or h= 21640 w/m*m*c in Wall Area(Background)
h= 51793 w/m*m*c in JIA