飞机螺旋桨设计与气动特性及滑流影响研究

发布时间：2018-08-26 15:05

【摘要】：螺旋桨滑流对飞机的气动性能会产生一定的影响,如何正确认识其流动影响,在螺旋桨与飞机的设计过程中具有相当重要的理论意义和工程应用价值。本文通过对某飞机螺旋桨进行具体理论设计,并将其应用到该飞机的螺旋桨滑流数值模拟研究中,通过对比有无螺旋桨滑流的飞机模型及不同螺旋桨相位角的飞机模型的数值计算结果,分析了滑流对飞机整体气动性能的影响程度。首先,基于空气螺旋桨理论,结合具体飞机的性能参数,确定了螺旋桨的设计参数,完成螺旋桨的设计工作。其次,对本文设计的单独螺旋桨模型运用了基于滑移网格的网格建模方法,计算分析了单独螺旋桨工作时的气动特性参数,并和设计值数据进行了对比,具有很好的吻合性,计算结果合理,说明了基于滑移网格的网格建模方法具有可行性。最后,设计了飞机的具体外形,采用滑移网格的建模方法,对螺旋桨滑流与飞机的干扰流场开展了数值模拟研究,通过对比有/无螺旋桨模型、不同螺旋桨相位角模型、安装在飞机上的螺旋桨模型和单独螺旋桨模型之间的计算结果,分析了滑流对飞机整体气动性能的影响及飞机尾流对螺旋桨气动性能的影响。CFD计算结果中流场的结构合理,和一般飞机的气动性能规律吻合较好,说明滑移网格方法能够较为有效地处理螺旋桨滑流的问题。
[Abstract]:The propeller flow will have a certain influence on the aerodynamic performance of aircraft. How to correctly understand the influence of propeller flow is of great theoretical significance and engineering application value in the design of propeller and aircraft. In this paper, the propeller of a certain aircraft is designed and applied to the numerical simulation of the propeller flow of the aircraft. By comparing the numerical results of the aircraft model with or without propeller slip flow and the aircraft model with different propeller phase angles, the influence of the slip flow on the overall aerodynamic performance of the aircraft is analyzed. Firstly, based on the air propeller theory and the performance parameters of the aircraft, the design parameters of the propeller are determined and the design work of the propeller is completed. Secondly, the single propeller model designed in this paper uses the grid modeling method based on slippage grid, calculates and analyzes the aerodynamic characteristic parameters of the single propeller working, and compares with the design value data. The calculation results are reasonable, which shows that the grid modeling method based on sliding mesh is feasible. Finally, the specific shape of the aircraft is designed, and the numerical simulation of the interference flow field between the propeller slip flow and the aircraft is carried out by using the sliding grid modeling method. By comparing the propeller model with / without propeller model, the different propeller phase angle models are compared. The calculation results between the propeller model and the single propeller model installed on the aircraft are analyzed. The effect of the slippery flow on the overall aerodynamic performance of the aircraft and the influence of the aircraft wake on the aerodynamic performance of the propeller are analyzed. The structure of the flow field in the CFD calculation results is reasonable. It is shown that the slip grid method can deal with the problem of propeller slip flow effectively.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：V228
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本文编号：2205244