Discussion
A model has a frontal area of \( 0.08 \) m\( ^2 \) in a test section of \( 2.0 \) m\( ^2 \). Its blockage ratio is
Answer: A
The ratio is \( 0.08/2.0 = 0.04 \), that is four per cent. This sits inside the usual guideline of five per cent or so, above which the blockage corrections become large enough to cast doubt on the data rather than merely adjust it.
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