摘要
基于势流理论面元法建立了吊舱推进器定常性能的计算方法.分别建立螺旋桨和吊舱的积分方程,通过在表面上布置双曲面元将方程离散为以面元上偶极强度为未知量的矩阵.螺旋桨和吊舱之间的相互影响通过迭代计算来处理.Newton-Raphson迭代过程被用来在桨叶随边满足压力Kutta条件.为避免数值求导中的奇异性,用柳泽(Yanagizawa)方法求得物体表面的速度分布.支架作为升力体处理,并通过迭代计算更新支架的尾涡形状.计算了拖式吊舱推进器的定常水动力性能,与实验结果的比较表明,计算误差在5%以内.分析了舱体对螺旋桨的影响,舱体的伴流会引起螺旋桨的载荷增大.
A numerical method based on the potential flow theory is proposed for predicting the steady performance. Integral equation for surfaces of pod and propeller were established, the integral equation was transformed into a matrix equation by dividing the surface of pod and propeller into panels. The influence between propeller and pod was achieved by iterative calculation. Newton-Raphson iterative procession was used on the trailing edge to meet the pressure Kutta condition. Yanagizawa method was used to calculate the tangential velocity on the pod and propeller surface. The strut was treated as lifting body, and the geometry of strut wake was refreshed after each iterative calculation. The steady performance of tractor podded propulsor was calculated, the comparison between computational results and experimental results indicate that the calculating error is within 5%. The wake of pod increase the load of propeller.
出处
《船舶工程》
CSCD
北大核心
2010年第2期25-28,共4页
Ship Engineering
基金
教育部博士点基金(20060217020)
