对转涡轮气动设计方法研究

【作者】 闫晓娜；

【导师】 乔渭阳；

【作者基本信息】 西北工业大学 ， 航空宇航推进理论与工程， 2003， 硕士

【摘要】 本论文的工作来源于航空科学基金项目，主要是研究对转涡轮的气动设计方法，并通过对对转涡轮的气动设计与分析，搞清对转涡轮设计的关键问题、发现区别于常规涡轮设计的特殊性，为今后先进军用战斗机发动机燃气涡轮设计与研制奠定理论基础。 本文首先采用流线曲率法对1+1对转涡轮子午面通流进行了初步设计；然后根据子午面通流所设计出的叶栅进、排气马赫数、进气角等利用中心流线法发展了对转涡轮叶栅的设计程序，自动设计出对转涡轮的叶片叶型。最后对所设计出的对转涡轮平面叶栅内部流场进行了初步数值计算，采用的计算格式为Jamescn的具有二阶精度的Runge—Kutta四步显式有限体积法，结合时间推进求解Euler方程。 为了证实本文方法适用性，本文把对转涡轮气动设计的结果与相关参考文献的结论进行了对比，结果吻合较好。更多还原

【Abstract】 The work of this thesis is financially supported by the aero fund project. The main purpose is to study the aerodynamics design technology of counter-turbine, to find the question differing from the aerodynamics design of general turbine, and to provide theoretical basis for development of aeroengine.First, the design method for the counter-turbine meridional flow is developed in the present thesis, and one 1+1 type counter-turbine is designed using this method. Then, a blade profile design program is accomplished by means of center-streamline. With this program, the blade suit for flow parameters that was obtained from the meridional-flow program is designed. Finally, the flow field of the cascade of the counter-turbine is simulated using the CFD program. The CFD program is based on the Jameson cell-centered finite volume method.To demonstrate the method developed in this thesis, the results obtained in this paper are compared with the results presented in other references, and good coherence is found.更多还原