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空間速度

空間速度 是一個天體相對於太陽本地靜止標準 真實的運動

天測學

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它在銀河座標系統的組成都常使用U、V、和W,單位為公里/秒。U的方向朝向銀河中心為正值,V的正值是銀河轉動的方向,W以朝向銀河北極方向為正值。這些速度分量可以從觀察徑向速度自行視差來計算[1]

化學

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化學反應器的設計中也有空間速度,這是表示體積流量和反應器空間的關係。它通常以SV表示,並且與在化學反應器中的停留時間,τ相關聯。

在關係式中,SV = 1/τ = 體積流量/體積

空間速度和停留時間的計算要在相同的條件下。

空間速度,在化學反應器的設計上,可以顯示在單位時間內需要供應多少的物料讓反應器空間來處理。例如,一個空間速度是7 hr−1的反應器,每小時能夠處理的物料是1 hr−1的反應器體積的7倍。

註解

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  1. ^ Johnson & Soderblom 1987, Astronomical Journal 93, 864

參考資料

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相關條目

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空間速度
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