问题描述：
船舶英语求大神翻译
In this paper, a potential based panel method is employed both for the propeller and
duct. The hydrodynamic interaction among duct, propeller and boss is taken into consideration
by an iterative method.The velocity induced by duct is treated as one part of the inflow relative to propeller and boss and the velocity induced by propeller and boss is treated as one part of the inflow relative to duct.First the flow around propeller and boss together is solved directly. Then the flow around duct is calculated. The iterative process proceeds until both the loads of duct and propeller converge.When the velocity on the duct induced by propeller is computed,two different treatments are applied. One is that the velocity on the duct induced by propeller is averaged circumferentially,which means the duct operates in the axis- symmetrical
flow. The other is that the duct is assumed to rotate with the propeller at the same angular velocity, in which case the velocity on the duct induced by propeller varies circumferentially.
The surface of the duct and propeller together with boss are divided into small hyper-
boloidal quadrilateral panels. The control point is located at center of each panel. The doublet and source with constant strength are distributed on each panel.As the strength of the latter is known,the boundary integral equations of doublet can be discretized into two sets of linear algebraic equations.
A set of linear algebraic equations for unknown doublet strengths on the propeller can be written as follows:
In this paper, a potential based panel method is employed both for the propeller and
duct. The hydrodynamic interaction among duct, propeller and boss is taken into consideration
by an iterative method.The velocity induced by duct is treated as one part of the inflow relative to propeller and boss and the velocity induced by propeller and boss is treated as one part of the inflow relative to duct.First the flow around propeller and boss together is solved directly. Then the flow around duct is calculated. The iterative process proceeds until both the loads of duct and propeller converge.When the velocity on the duct induced by propeller is computed,two different treatments are applied. One is that the velocity on the duct induced by propeller is averaged circumferentially,which means the duct operates in the axis- symmetrical
flow. The other is that the duct is assumed to rotate with the propeller at the same angular velocity, in which case the velocity on the duct induced by propeller varies circumferentially.
The surface of the duct and propeller together with boss are divided into small hyper-
boloidal quadrilateral panels. The control point is located at center of each panel. The doublet and source with constant strength are distributed on each panel.As the strength of the latter is known,the boundary integral equations of doublet can be discretized into two sets of linear algebraic equations.
A set of linear algebraic equations for unknown doublet strengths on the propeller can be written as follows:
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