中大型水面舰船推进系统研究分析

随着海军对船舶动力/电力平台要求的不断提高,舰船混合动力系统以其高燃油经济性、高续航能力等优势而越来越受到各方关注。本文结合国内外舰船发展状况,针对中大型水面舰船推进动力系统进行分析,阐述混合动力系统的优势和发展空间。     

驱护舰编队使用拖曳声纳反潜的队形配置

论文在分析驱护舰编队反潜队形配置原则的基础上,提出将拖曳声纳哨舰部署在编队前方的三种队形组成样式。通过计算优质因素FOM估算拖曳声纳作用距离,进而确定驱护舰编队使用拖曳声纳反潜的舰距配置。论文研究成果对驱护舰编队反潜队形配置研究具有一定参考价值。     

驱逐舰烟气排放过程数值仿真及同模型试验比较研究(英文)

The exhaust smoke dispersion for a generic frigate is investigated numerically through the numerical solution of the governing fluid flow, energy, species and turbulence equations. The main objective of this work is to obtain the effects of the yaw angle, velocity ratio and buoyancy on the dispersion of the exhaust smoke. The numerical method is based on the fully conserved control-volume representation of the fully elliptic Navier-Stokes equations. Turbulence is modeled using a two-equation(k-ε) model. The flow visualization tests using a 1/100 scale model of the frigate in the wind tunnel were also carried out to determine the exhaust plume path and to validate the computational results. The results show that down wash phenomena occurs for the yaw angles between ψ =10° and 20°. The results with different exhaust gas temperatures show that the buoyancy effect increases with the increasing of the exhaust gas temperature. However, its effect on the plume rise is less significant in comparison with its momentum. A good agreement between the predictions and experiment results is obtained.     

全封闭型护卫舰空调通风系统及其隔振降噪设计

论述了全封闭型舰艇空调通风系统通常的主要特点及适宜采用的相应设计，概述了空调通风系统减振噪的研究设计和综合治理，并以某舰为例列述了各项设计的实船效果。     

近期水面舰艇的科技创新

介绍了近年来各国的新型水面舰艇，以及近期与未来水面舰艇科技创新的主要方向。     

海洋水文气象对驱护舰兵力作战效能影响研究磁

驱护舰兵力作战行动受到海战场环境的直接影响,其中海洋水文气象条件是影响驱护舰兵力作战行动的重要因素。论文通过分析影响驱护舰兵力作战效能的各种海洋水文气象因素,建立指标体系,运用模糊评价的方法,对海战场海洋水文气象条件对驱护舰兵力作战效能的影响进行研究,通过研究可以为指挥员科学选择作战海域、作战时间以及合理的运用驱护舰兵力等指挥决策提供参考。     

不同舰船机库外形下艉流场特征数值模拟研究

为了研究舰船艉流场特性,采用基于SA湍流模型的非定常脱体涡模拟(Detached-Eddy Simulation,DES)对典型护卫舰船艉流场进行数值模拟,研究三种不同机库外形在0°与右舷45°自由来流风向角下的非定常特性以及对舰船艉部大分离流场的影响,尤其是对舰载直升机起降环境的影响,并推导了快速预测舰船艉部回流区范围的经验公式。通过与风洞试验数据对比,验证了该计算方法的准确性。由非定常计算的时均结果与瞬时结果表明,相比两侧较低高度的机库外形,等高外形的机库不利于直升机的舰面安全起降;通过合理的降低机库高度可以有效地改善艉部飞行甲板处的起降环境;研究结果验证了经验公式对回流区范围预测的有效性。研究成果可为工程应用提供参考。     

Numerical modeling of exhaust smoke dispersion for a generic frigate and comparisons with experiments

The exhaust smoke dispersion for a generic frigate is investigated numerically through the numerical solution of the governing fluid flow, energy, species and turbulence equations. The main objective of this work is to obtain the effects of the yaw angle velocity ratio and buoyancy on the dispersion of the exhaust smoke The numerical method is based on the fully conserved control-volume representation of the fully elliptic Navier-Stokes equations. Turbulence is modeled using a two-equation （k-ε） model The flow visualization tests using a 1/100 scale model of the frigate in the wind tunnel were also carried out to determine the exhaust plume path and to validatc the computational results. The results show that down wash phenomena occurs for the yaw angles between ψ=10° and 20°. The results with different exhaust gas temperatures show that the buoyancy effect increases with the increasing of the exhaust gas temperature. However, its effect on the plume rise is less significant in comparison with its momentum. A good agreement between the predictions and experiment results is obtained.