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熱線流速計

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熱 線 の 熱 平 衡<br />

21<br />

Wire element<br />

d<br />

x<br />

dx<br />

T p<br />

T w<br />

Heat<br />

Prong<br />

Heat generated<br />

Heat accumulated<br />

l<br />

conduction in<br />

Heat<br />

conduction out<br />

Heat to cross-flow<br />

I<br />

2<br />

R<br />

w<br />

=<br />

πd<br />

cwgρ<br />

4<br />

2<br />

w<br />

∂T<br />

∂t<br />

w<br />

+ πdh(<br />

T<br />

w<br />

−T<br />

a<br />

)<br />

流 体 工 学 特 論<br />

ブリッジ 回 路<br />

22<br />

R<br />

w<br />

= R<br />

o<br />

{ 1+ β(<br />

Tw<br />

−To)<br />

}<br />

流 体 工 学 特 論

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