基于CFD的轴流式压缩机与风机性能及改进设计研究
发布时间：2018-11-26 19:51
【摘要】：叶轮机械在国民经济尤其是整个重工业体系中占有十分重要的地位。轴流式叶轮机械被广泛的应用于航空、舰船、导弹、坦克、高速重载机车、电站、空分和冶炼等高端技术领域。由于轴流增压式叶轮机械内部流动异常复杂,且试验研究的周期较长、成本高,故本文借助先进CFD技术,以实际工程项目为依托,主要采用数值模拟的方法研究轴流增压式叶轮机械内部真实的流动状况,结合适当的实验验证分析,掌握其流动现象发生、发展的规律。目前,这种研究方法在叶轮领域是广泛采用的研究方法之一。 针对某多级轴流式燃气压缩机,本文中通过CFD数值分析软件NUMECA研究其内流部件构型与气动性能的映射规律,探究其设计特点；结合数值方法与物理仿真,掌握部件流动参数及载荷分布规律；特别研究工质组分复杂且随流动易变的特点对轴流燃气压缩机性能影响,提出符合工程精度要求的计算方法,分析总结多级轴流燃气压缩机的设计特点,为轴流式燃气压缩机改进以及模化设计提供技术支持。 针对某大功率机车冷却塔轴流通风机,本文以某进口冷却风机原始数据为基础,根据机车新的设计要求,以成熟的一维计算方法为基础对其叶轮进行多方案改进设计并获得多组结构数据,以此为基础建立叶片以及叶轮三维实体模型,采用CFD软件NUMECA对叶轮内部流场进行了深入分析与研究。经过性能对比并根据制造需求,确定了最终的叶轮方案,并完成部分样机制造及气动实验验证。在满足外形尺寸不变、降低转速、限制功率的苛刻条件下,实现出口风压相对提高以及效率改善的叶轮设计需求。
[Abstract]:Impeller machinery plays an important role in the national economy, especially in the whole heavy industry system. Axial flow impeller machinery is widely used in aviation, ships, missiles, tanks, high-speed heavy haul locomotives, power stations, air separation and smelting and other high-end technical fields. Because the internal flow of axial flow turbocharged impeller is extremely complex, the period of experimental study is longer and the cost is high, so this paper relies on the actual project with the help of advanced CFD technology. The real flow situation in axial flow turbocharged impeller machinery is studied by numerical simulation, and the occurrence and development law of flow phenomenon is grasped in combination with appropriate experimental verification and analysis. At present, this research method is widely used in the field of impeller research. Aiming at a multistage axial flow gas compressor, this paper studies the mapping law between the configuration and aerodynamic performance of its internal flow components by CFD numerical analysis software NUMECA, and probes into its design characteristics. Combined with numerical method and physical simulation, the flow parameters and load distribution of components are grasped. In particular, the influence of the complex composition of working fluid on the performance of axial flow gas compressor is studied, and the calculation method according with the requirement of engineering precision is put forward, and the design characteristics of multistage axial flow gas compressor are analyzed and summarized. Provide technical support for axial flow gas compressor improvement and modeling design. Based on the original data of an imported cooling fan, according to the new design requirements of locomotive, this paper aims at the axial flow ventilator of a high power locomotive cooling tower. On the basis of the mature one-dimensional calculation method, the impeller was improved by multi-scheme design and the multi-group structure data were obtained. Based on this, the three-dimensional solid model of the blade and impeller was established. The flow field in impeller was analyzed and studied by CFD software NUMECA. Finally, the final impeller scheme is determined according to the requirement of manufacturing, and some prototyping and aerodynamic experiments are completed. The impeller design requirement of relative increase of outlet wind pressure and improvement of efficiency can be achieved under the harsh conditions of constant shape size, reducing rotational speed and limiting power.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH453;TH43
本文编号：2359466
[Abstract]:Impeller machinery plays an important role in the national economy, especially in the whole heavy industry system. Axial flow impeller machinery is widely used in aviation, ships, missiles, tanks, high-speed heavy haul locomotives, power stations, air separation and smelting and other high-end technical fields. Because the internal flow of axial flow turbocharged impeller is extremely complex, the period of experimental study is longer and the cost is high, so this paper relies on the actual project with the help of advanced CFD technology. The real flow situation in axial flow turbocharged impeller machinery is studied by numerical simulation, and the occurrence and development law of flow phenomenon is grasped in combination with appropriate experimental verification and analysis. At present, this research method is widely used in the field of impeller research. Aiming at a multistage axial flow gas compressor, this paper studies the mapping law between the configuration and aerodynamic performance of its internal flow components by CFD numerical analysis software NUMECA, and probes into its design characteristics. Combined with numerical method and physical simulation, the flow parameters and load distribution of components are grasped. In particular, the influence of the complex composition of working fluid on the performance of axial flow gas compressor is studied, and the calculation method according with the requirement of engineering precision is put forward, and the design characteristics of multistage axial flow gas compressor are analyzed and summarized. Provide technical support for axial flow gas compressor improvement and modeling design. Based on the original data of an imported cooling fan, according to the new design requirements of locomotive, this paper aims at the axial flow ventilator of a high power locomotive cooling tower. On the basis of the mature one-dimensional calculation method, the impeller was improved by multi-scheme design and the multi-group structure data were obtained. Based on this, the three-dimensional solid model of the blade and impeller was established. The flow field in impeller was analyzed and studied by CFD software NUMECA. Finally, the final impeller scheme is determined according to the requirement of manufacturing, and some prototyping and aerodynamic experiments are completed. The impeller design requirement of relative increase of outlet wind pressure and improvement of efficiency can be achieved under the harsh conditions of constant shape size, reducing rotational speed and limiting power.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH453;TH43
【引证文献】
相关硕士学位论文 前2条
1 李琪;轴流压缩机叶片气动设计[D];南京航空航天大学;2016年
2 尚兴超;某气动发射系统关键问题研究[D];南京理工大学;2014年
，本文编号：2359466
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