长江客船新船型开发试验研究——对双尾鳍线型的探讨

An Investigation on Ship Model Tests of Twin Skeg Hull Lines for Yangtze River New Passenger Ship Types

本文结合长江下游干线客船的船型开发研究,对于B/T=5.667、C_B=0.552的浅吃水新船型进行了船模试验研究,并以“东-11”型常规双桨线型为基础,设计了两种新的尾部线型方案:一种是双尾线型,另一种是双尾鳍线型。船模自航试验结果表明,在诸线型和试验方案中,双尾鳍桨外旋方案的DHP值最低;桨外疑方案的Q.P.C值也超过了内旋方案。本文还分析了双尾线型和双昆鳍线型的伴流测量和流线试验结果。笔者认为,对于宽而瘦的内河船型,双尾鳍线型是一种值得开发的节能线型。

With a view to improve the energy utilization of passenger ships for lower Yangtze River liner service, two new types of afterbody design were tank-tested. Both types have the same parameters, B/T=5.667 and C_B=0.552, and the same forebody lines based on the existing twin-screw ship'Dong-11'. The afterbody lines are different, one has twin-stern; the other, twin skeg.Comparative self-propelled model tests, streamline observations and wake measurements are presented and discussed in this paper. It was found that for this particular shallow draft vessel, the twin-skeg configuration with outward turning propellers gave better results both in DHP and QPC.A analysis of the effects of skeg on resistance and propulsion is made, It is proposed that the twin-skeg lines-plan is worthwhile to be considered as energy-saving shape for broad but slim river ship.