船-泵相互作用对喷水推进器推进性能的影响

发布时间：2018-12-14 19:07

【摘要】：为研究喷水推进船快速性预报中船体与喷水推进器相互作用机理,借助于计算流体力学(CFD)方法研究船-泵相互作用对喷水推进器推进性能的影响.通过计算由k-ε湍流模型封闭的RANS方程,分别得到敞水条件下和考虑船体斜升角、纵倾等因素影响的装船后喷水推进器的三维黏性流场,敞水条件下计算结果与试验数据的良好吻合验证了数值模型和方法的可信性.不同斜升角和纵倾模型计算结果表明:船体斜升角和横倾对喷水推进器推进性能影响很小;船体尾升角和纵倾角的变化改变了船体边界层,对喷水推进器推进性能和作用因子影响很大;纵倾角由正变负,喷水推进器对船体边界层的利用增强,使流量变小,功率、推力和扬程变大;进流动量系数、进流能量系数、动量作用效率和能量作用效率均减小.喷水推进器也反作用于船体,产生使船体纵倾角减小的力矩.
[Abstract]:In order to study the interaction mechanism between ship hull and water jet propeller in predicting the rapidity of water jet propulsion ship, the influence of ship pump interaction on the propulsion performance of water jet propeller was studied by means of computational fluid dynamics (CFD) method. By calculating the RANS equation sealed by k- 蔚 turbulence model, the three-dimensional viscous flow field of the ship's post-loading water jet propeller under open water conditions and considering the factors of hull angle of rise and trim is obtained, respectively. The validity of the numerical model and the method is verified by the good agreement between the calculated results and the experimental data under open water conditions. The calculation results of different angle and pitch model show that the inclined rise angle and heeling angle of the hull have little effect on the propelling performance of the water jet propeller. The change of hull tail lift angle and longitudinal inclination angle changes the hull boundary layer, which has a great influence on the propulsion performance and action factor of water jet propeller. The longitudinal inclination angle is changed from positive to negative, and the utilization of water jet propeller to the hull boundary layer is enhanced, which makes the flow rate become smaller, power, thrust and lift increase, and the input flow coefficient, input energy coefficient, momentum action efficiency and energy action efficiency decrease. Water-jet propellers also react on the hull, producing a torque that reduces the hull inclination.
【作者单位】：海军工程大学动力工程学院;91663部队;
【基金】：国家自然科学基金资助项目(51209212) 研究生专业课程建设基金资助项目(HGKCJJ2013002)
【分类号】：U664.34

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