流体力学与传热学考试题目
1-1下图所示的两个
U形管压差计中
,同一水平面上的两点
A、B或C、D的压强是否相等？
答：在图
1—1所示的倒
U形管压差计顶部划出一微小空气柱。
空气柱静止不动，说明两侧的压强相等，设为
P。由流体静力学基本方程式：
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<Object: word/embeddings/oleObject2.bin>
<Object: word/embeddings/oleObject3.bin>
<Object: word/embeddings/oleObject4.bin>
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∴<Object: word/embeddings/oleObject6.bin>
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即A、B两点压强不等。
而<Object: word/embeddings/oleObject8.bin>
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