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发帖数: 16 | 1 一个朋友让我把下面2个问题贴到这，因为他没有mitbbs帐号。多谢了亚！ ：）
an axial flow fan 1.83m diameter is designed to run at a speed of 1400rev/min
with an average axial air velocity of 12.2m/s. a quarter scale model has been
built to obtain a check on the design and the rotational speed of the model
fan is 4200rev/min.determine the axial air velocity of the model so that
dynamical similarity with the full scale fan is preserved.the effects of
reynolds number change may be neglected.
A sufficiently large pressure vessel beco |
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