加装风帆对VLCC直升机甲板气流场的影响

Influence of Installed Sail on Air Flow Field above Helicopter Deck for VLCC

船舶加装翼型风帆在显著降低主机功率、节省燃油消耗和减少温室气体排放的同时,也改变了船上直升机甲板上方的气流场,因此,非常有必要开展加装风帆对船舶直升机甲板气流场的影响评估。采用风洞中的热线风速仪测量技术,以30万吨级超大型油船(VLCC)为对象,计及风向角、垂向高度等影响因素,定量评估加装风帆对船舶直升机甲板气流场的影响;在此基础上,根据CAP437标准推荐的判定准则,获得VLCC有、无风帆的直升机飞行包络线。研究结果可为加装风帆的VLCC直升机安全起降作业提供帮助,也可为后续加装风帆的船型甲板布局设计提供参考。

Main engine power of ship, its fuel consumption and CO2 emissions can be decreased as wing sail systems installed, together also with impact on air flow field above its helicopter deck simultaneously. It’s necessary to carry out the research on air flow field above helicopter deck of the ship as sail systems installed. Taking a 300 000 DWT VLCC as the object, the influence of the installed sail on the air flow field above the helicopter deck is elevated by fixed quantity using the hot wire measurement considering the effect of wind flow angle and vertical height. On the basis, according the recommended judgment criterion by CAP437, the helicopter flight envelopes with and without sail of VLCC are acquired. The research results can provide help for the operation of the helicopter’s landing and taking off, and offer reference for the ship deck arranging design of the following sail installation.