specimen A:
fan reading 15 20 25 30 35 40 45 50 55 60 65 70
pressure 1.2 2.8 5.0 7.7 10.8 14.3 18.2 22.5 27.3 32.0 37.3 42.9
reduced drag -0.1 -0.1 -0.2 -0.3 -0.5 -0.6 -0.8 -0.9 -1.1 -1.3 -1.5 -1.7
(return)
fan reading 15 20 25 30 35 40 45 50 55 60 65
pressure 1.0 2.7 4.9 7.6 10.7 14.3 18.2 22.4 27.1 32.0 37.3
reduced drag -0.1 -0.1 -0.2 -0.3 -0.5 -0.6 -0.7 -0.9 -1.1 -1.3-1.5
->在fan reading 50 時始晃動
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specimen B:
fan reading 15 20 25 30 35 40 45 50 55 60 65 70
pressure 1.1 2.9 5.1 7.9 11.0 14.7 18.6 23.0 27.7 32.6 38.3 44.0
reduced drag -0.3 -0.5 -0.8 -1.0 -1.4 -1.8 -2.2 -2.7 -3.3 -3.9 -4.5 -5.2
->在fan reading 15 時始晃動
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specimen C:
fan reading 15 20 25 30 35 40 45 50 55 60 65 70
pressure 1.1 2.8 5.0 7.7 10.7 14.4 18.2 22.5 27.2 32.2 37.6 43.0
reduced drag -0.1 -0.3 -0.5-0.7 -1.0 -1.3 -1.7 -1.9 -2.4 -2.8 -3.3 -3.8
->在fan reading 50 時始晃動
specimen D:
fan reading 15 20 25 30 35 40 45 50 55 60 65 70
pressure 1.1 2.7 4.9 7.4 10.6 14.2 18.0 22.2 26.9 31.8 37.0 42.6
reduced drag -0.1 -0.2 -0.3 -0.4 -0.6 -0.7 -0.9 -1.1 -1.3 -1.5 -1.8 -2.1
->在fan reading 60 時始晃動
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寬29mm 距圓孔高85mm 正方形面積12*12cm2
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