CAJ | 학술논문

针对目前普通螺旋桨推进效率偏低等问题,突破传统螺旋桨的设计理念,提出并设计一种新型的自重构螺旋桨,其桨叶能够根据划水的需要自动开闭.对所设计的自重构螺旋桨的结构进行综合分析,通过螺旋桨浆叶构态的分析,给出三种变形构态.假设螺旋桨在理想流体中匀速旋转,运用流体力学理论经过进一步推导得到桨叶运动轨迹,对自重构螺旋桨机构进行运动分析.根据新型螺旋桨系统的结构特点和工作原理,基于升力线理论和叶元体理论对其诱导速度、推力和转矩分别进行研究,建立自重构螺旋桨的水动力性能理论分析模型,并进行数值仿真.计算自重构螺旋桨的效率,与传统船舶用螺旋桨的敞水性能进行对比研究,研究结果证明了新型的自重构螺旋桨的优越性.
침대목전보통라선장추진효솔편저등문제,돌파전통라선장적설계이념,제출병설계일충신형적자중구라선장,기장협능구근거화수적수요자동개폐.대소설계적자중구라선장적결구진행종합분석,통과라선장장협구태적분석,급출삼충변형구태.가설라선장재이상류체중균속선전,운용류체역학이론경과진일보추도득도장협운동궤적,대자중구라선장궤구진행운동분석.근거신형라선장계통적결구특점화공작원리,기우승력선이론화협원체이론대기유도속도、추력화전구분별진행연구,건립자중구라선장적수동력성능이론분석모형,병진행수치방진.계산자중구라선장적효솔,여전통선박용라선장적창수성능진행대비연구,연구결과증명료신형적자중구라선장적우월성.
A novel design concept is proposed to improve the efficiency of traditional boat propellers, and a propeller with self-reconfigurable structure is designed, its blades can open and close automatically to satisfy the need of water propelling. The mechanism of this new-style propeller is analyzed and the configurations in different working states are studied, and three of which are presented. Assuming that the propeller rotates at an even speed in idealized flood, the trajectory of a certain point on the blade is obtained according to the theory of flood dynamics, and the motion analysis of the propeller blade mechanism is performed. According to the characteristics and working principle of this new propeller system, the induced velocity, thrust and torque are derived on the basis of the lifting line theory and blade elements theory, the hydrodynamic performance analysis model is built and simulated. Efficiency of the propeller with self-reconfigurable structure is calculated. A comparative study between this new style propeller and the traditional propellers shows the superiority of the former.