摘要
本文提供了一个计算螺旋桨水动力性能的非定常非线性涡格法(UNVLM)。该方法中,螺旋桨尾涡形状预先是未知的,而是作为解的一部分由尾涡泄出和卷曲的时间历程来确定。文章通过常规桨DTNSRDC-4118和大侧斜桨DTNSRDC-4383的敞水性能计算,了解了考虑梢部分离对计算结果的影响。与现有的实验数据比较表明,本方法所得的结果是令人满意的。计算结果还清楚地展示了螺旋桨尾涡的变形动态以及稳定后尾涡片的几何形状,这对加深理解和进一步研究螺旋桨尾涡结构有重要的实际意义。
This paper presents an unsteady nonlinear vortex lattice method (UNVLM) for calculation of propeller hydrodynamic performance characteristics, in which the shape and roll-up of the wake vortex sheet are not known a priori, but are determined as a part of solution by the time-dependent vortex shedding procedure. Calculations for performances of a conventional propeller DTNSRDC-418 and a highly skewed propeller DTNSRDC-4383 are performed by this method. The influence of the blade tip vortex separation uponthe performance characteristics of propeller is investigated. Comparison of these predictions with experimental data indicates that the agreement is satisfactory. In addition, the time-dependent deformation of shed vortex sheet and its final stable geometricshape are also shown clearly. Such information may be of practical value in studying the geometric shape of free vortex wake andestablishing a reasonable free vortex wake model.
出处
《中国造船》
EI
CSCD
北大核心
1992年第2期22-32,共11页
Shipbuilding of China
