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【单选题】
在长为 Lm , Hm 的降尘室中,颗粒的沉降速度为 uT m/s ,气体通过降尘室的水平流速为 u m/s ,则颗粒能在降尘室内分离的条件是() prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>A.
L/uT ＜ H/u prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
B.
L/u ＜ H/uT prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
C.
L/u ≥ H/uT prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
D.
L/uT ≥ H/u
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