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95000DWT散货船喷气减阻模型试验研究

DOI: 10.3969/j.issn.1006-7043.201309075

Keywords: 肥大型船, 气层减阻, 气流量, 航速, 排水量, 槽深, 相对减阻率, 绝对减阻率

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Abstract:

为探讨气层减阻技术在大型低速运输船舶上的实施方法,在拖曳水池里开展了95000DWT散货船1?w38模型喷气减阻试验,研究了气流量、航速、排水量、凹槽深度对喷气减阻效果的影响规律。试验结果表明:在95000DWT散货船模型底部设置凹槽并喷气,模型总阻力大幅度降低。随着气流量增加,阻力降低幅度增大,存在一个饱和气流量:当Fr=0.139~0.182时,随航速增加,减阻率呈降低趋势;凹槽深度增加,喷气减阻效果提高,但不喷气时凹槽会导致阻力增加,且阻力增加幅度随凹槽深度增加而增加,存在一个最佳凹槽深度(h/B=0.024);压载排水量减阻率高于设计排水量减阻率。凹槽深度20 mm,设计航速下,饱和喷气(Cq=0.210)时,设计排水量下绝对减阻率可达26.99%,压载排水量下绝对减阻率可达33.79%。

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