【摘要】 在定常、有势、不可压流的前提下,对由回转体、附体围壳、十字翼和环形翼组成的潜体的水动力导数,采用奇点分布法进行了计算.计算中在潜体表面布置源汇和偶极子以模拟厚度影响及升力效应,并探讨了封闭体奇导性问题的解决方法,计算值与试验结果符合良好.在展弦比相同时,环翼升力线斜率是平面无后掠翼的两倍.更多还原

【Abstract】 Hydrodynamic derivatives of a submerged body containing a rotational body, enclosing shell, cross foil and annular airfoil are calculated using the method of singular point distribution on condition that the fluid is steady and potential as well as incompressible. The source-sink and dipole are arranged on the surface of the body to simulate the effect of the thickness and the lifting force. The method for solving the singularity due to the enclosing feature of the body is discussed. Calculated results agree well with those by experiment. The slope of the lift curve for an annular airfoil is twice that for a plane unswept foil of the same aspect ratio.更多还原