【单选题】【消耗次数:1】
有一串联管道,分别由管径为d1与d2的两管段串接而成,d1d2。某流体稳定流过该管道。今确知d1管段内流体呈滞流,则流体在d2管段内的流型为: 。
(1)湍流;。??
(2)过渡流;
(3)滞流;
(4)需计算确定
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