【作者】 林琳；

【导师】 孙海鸥；

【作者基本信息】 哈尔滨工程大学 ， 轮机工程， 2011， 硕士

【摘要】 目前我国陆上石油后备资源严重不足,迫切需要发展深海油气勘探和开发技术,而海洋平台的设计、建造及相关技术是海洋油气资源开发的关键技术之一。海洋平台所处的环境十分复杂并且恶劣,因此保证海洋平台安全有效地运行将为我国海洋油气资源的安全开采提供科学可靠的保障。舱室通风系统是海洋平台的重要组成部分,因为海洋大气中含有盐分并且以气溶胶形式存在,所以为了给舱室通风系统提供充足的洁净空气则必须在进口处安装滤清器。本文所研究的舱室通风系统进气滤清器主要由惯性级和网垫级两个滤清件组成,通过对两滤清部件与整体滤清器结构的深入分析可知惯性级和网垫级相对于整体滤清器结构复杂,为了使舱室通风系统进气滤清器数值模拟时降低整体的网格数量,提高网格质量,本文采用多孔介质边界条件将滤清件的特性转换为整体滤清器流场的可变边界条件,因此首先需要获得惯性级和网垫级的阻力特性。本文先局部后整体的研究方案,主要进行了以下几方面的工作：1.惯性级流场的数值模拟。首先对惯性级的流场进行数值模拟,通过数值模拟获得了惯性级阻力特性和效率特性随来流速度及惯性级叶片间距变化规律。2.网垫级流场的数值模拟。通过数值模拟获得了网垫级阻力特性和效率特性随网丝直径和丝网层间距的变化规律。3.舱室通风系统进气滤清器的整体数值模拟与实验研究。在惯性级和网垫级阻力特性的研究基础上应用多孔边界条件,同时结合周期性边界条件对舱室通风系统进气滤清器的阻力特性进行数值模拟,并且利用专门的滤清器实验风洞进行舱室通风系统进气滤清器的阻力性能研究,并对数值模拟结果加以验证。更多还原

【Abstract】 At present our country continental petroleum reserve resources seriously insufficient, the development of the technologies of deep-sea oil and gas exploration and extraction is urgently needed, while the design, construction and related technology of ocean platform is one of key techniques of the ocean petroleum resources development. The environment where ocean platform working is very complex and adverse, therefore guaranteeing the ocean platform working effectively and safely will provide the reliable safeguard for our country sea oil and gas resources safety mining.The ventilating system of cabin is an important part of the ocean platform, salinity exists in oceanic atmosphere at aerosol form, in order to provide sufficient clean air it is necessary to install moisture separator in inlet. Filter product design must be fully aware of its performance. For ventilating system intake filter the structure characteristics, under mentioned works had been done mostly:1. The numerical simulation of the flow fields in the inertial stages. Because the ventilating system of cabin intake filter is by inertia level and nets cushion level component, so this paper firstly inertial level of the flow field is simulated by numerical simulation won the inertial level resistance properties with characteristics and efficiency to flow speed and inertia stage blade spacing change rule.2. The numerical simulation of the flow fields in the inertial stages Nets cushion level flow field of the numerical simulation. Through numerical simulation won the nets cushion level resistance characteristic and efficiency properties with nets silk diameter and screen layer distance change rule.3. The numerical simulation and experimental study of moisture separator of ventilating system of cabin. The numerical simulation moisture separator of ventilating system of cabin on the application of porous boundary conditions which based on the research of inertial stage and multilayer gauge stage. Using a special experimental wind tunnel, experiments were carried out to study the resistance performance of the two stages moisture and moisture separator of ventilating system of cabin. The numerical simulation results were verified.更多还原