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1.(2)There is an appreciable scale effect on wake fraction,and the wake fraction decreases as the size of models increases.
2.伴流分数有明显的尺度效应,随模型尺度的增加而下降。收藏指正
2.The results obtained show that thrust deduction fraction is slightly increased and wake fraction decreased. The level of noise spectrum of screw behind body of revolution is droped about 1 db with frequency in the range of 5-40kc.
测试结果表明,推力减额t略有增加,伴流系数w减少,船后螺旋桨的噪声在频率为5～40kc频谱范围内约有1分贝的降低。收藏指正
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