节能前置导管对波浪增阻和失速的影响

The Ship Added Resistance and the Decrease of Ship Speed in Wave Influence with Flow Straightening Duct

以8万t巴拿马型级散货船为例,分别进行了光体和带前置导管的快速性节能试验和耐波性波模型试验。试验结果表明,肥大型的散货船安装前置导管可以有效提高船舶推进效率约2%,从而达到节能的目的。前置导管在波浪中有一定的减摇作用,减小船舶在波浪中的阻力增加,减小船舶对船舶的失速差值百分比影响较大,失速差值百分比在10%以上。因此,在波浪中安装节能的前置导管对船舶的失速系数有一定的影响。

The resistance and self-propulsion model tests for an 80,000 DWT bulk carrier with and without flow straightening duct mounted were conducted, and a propulsive efficiency improvement of 2 % was gained with the duct based on the tests re suits. Some anti pitching effect appears in regular wave tests when flow straightening duct is added,which decreases the added wave resistance. The difference between the decreases of ship speeds with and without flow straightening duct is more than 10%. The experiment shows that a flow straightening duct can improve the ship performance in waves.