螺旋桨静推力数值模拟与实验对比分析

Comparative Analysis of Propeller Static Thrust Simulation and Experiment

针对飞艇项目研制的工程实际需求,通过经验公式和CFD数值模拟两种方法对螺旋桨的静推力特性进行了计算和对比分析;最后通过设计发动机-螺旋桨推力实验台的实验对上述两种方法得出的结果进行了验证。分析结果表明螺旋桨静推力经验公式和实验结果相吻合,公式可以在以后的工程应用中使用;在一定的边界条件下,CFD计算的结果与实验值接近,说明使用的CFD计算方法是可取的。在CFD数值模拟计算过程中,实验值和经验公式估算值可以在确定CFD的边界条件以及确认计算结果的准确性方面提供重要的参考依据。

Static thrust is an important character to measure the performance of the propulsion system for an aircraft. This paper is based on the engineering practice of an airship project. Through computing in practical formula, CFD simulation, and then through experiments - designed by the author himself, this paper does a comparative analysis on the static thrust characters of propeller. According to the study, the results from practical formula is similar to that from experiments, which means that the practical formula can be used in future projects; and under certain boundary condition, the result from CFD simulation is similar to the experiment results, which proved that the CFD method used in this paper is adoptable. In the CFD process, the results from experiment and the practical formula provide a very important reference in setting the boundary condition and checking the simulation result.