•Baseline disc: local hc on channel sides
(mean over vane height)
Channel modifications
• Flow redistribution within the channel
• Channel designs: (a) baseline; (b) with
SV1 vane at inlet; (c)with SV1 vane in
middle;(d) with SV1 vane at outlet; (e)
positioning details
• Average heat transfer coefficient along
the channel at 800 r/min
• Difference in the average heat transfer
coefficient values between the new
designs and the baseline disc
Discussion
• Mass flow through a 24osector of the disc
Discussion
• Average Nusselt numbers for the brake
dis designs
Conclusions
• A relatively simple modification – the
installation of an additional small vane
(per channel, between the existing
vanes) – demonstrated the ability to
increase convective cooling from the
ventilation channels.
Conclusions
• A radial position of these additional
vanes remains crucial for achieving
higher heat dissipation. Best results
have been obtained with the vanes placed
at the channel outlets, leading to
improvement in the total convective
cooling by nearly 14 per cent in
comparison with the baseline design
Conclusions
• CFDanalyses of airflow and convective
heat dissipation from a standard disc
with radial vanes gave vital information
regarding its weak points. Careful study
of airflow within the channel was
fundamental for identifying possible
improvements and testing new ideas and
designs
簡報結束 謝謝！