摘要
随着船舶业节能减排受到越来越多的关注,船舶在实际海浪中的性能也受到人们的重视,进行波浪中推进性能的精细研究成为新的需求。为此,进行了规则波中自航试验,研究了规则波中自航因子随波长船长比(λ/L_(pp))的变化规律。研究发现波浪的存在使得推力减额比静水中值有所增加,伴流分数、船身效率、敞水效率、推进效率比静水中值有所降低,并且峰值或谷值出现在λ/L_(pp)约为1.2附近。特别地,对于该船舶来说谷值处波浪中推进效率比静水中减小约40%。此外,规则波中波浪增阻、转速增加、推力增加、扭矩增加和功率增加无因次系数都随着λ/L_(pp)先增加后减小,在λ/L_(pp)约为1.2时达到峰值,且推力增加无因次系数与增阻无因次系数几乎相同。这些变化规律有助于深化波浪中船舶推进性能的研究。
In this paper, self propulsion tests in regular waves are conducted, and the behavior of self propulsion factor is studied. It is shown that the thrust deduction in waves is larger than that in calm, while the wake fraction, hull efficiency, open water efficiency, and propulsion efficiency are smaller than that in calm. The peak or valley occurs when the ratio of wavelength to the length of the ship λ/ Lpp is nearly 1.2. In particular the propulsion efficiency of this ship at the valley decreases about 40% than that in calm. In addition, non-dimensional coefficients of added resistance, added revolution, added trust, added torque and added power all firstly increase and then decrease with the increase of λ/ Lpp, as well as peaks occur when λ/ Lpp is nearly 1.2.
出处
《中国造船》
EI
CSCD
北大核心
2016年第1期1-8,共8页
Shipbuilding of China
关键词
自航因子
自航试验
推进效率
规则波
波浪增阻
功率增加
self propulsion factor
self propulsion test
propulsion efficiency
regular waves
added resistance
increase of power
