跨超音速静叶叶栅设计与数值模拟
首发时间:2015-12-16
摘要:在蒸汽轮机的末级与燃气轮机等动力装置中,应用跨超音速叶型可改善叶轮机械内部的气动特性。特征线法可以用于设计在超音速喷管出口平面产生平行均匀流动的壁面型线。本文给出了一种跨超音速静叶叶栅的设计方法,叶栅超音速段的设计采用特征线法;亚音速段设计采用几何参数法,使用贝塞尔曲线实现前缘圆弧段与叶栅超音速段的光滑连接,设计出跨超音速叶栅。使用CFX软件对设计出的叶栅进行了模拟和性能分析,验证了该设计方法的可行性。
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The design and numerical simulation of transonic and supersonic cascades
Abstract:In the late stage of the steam turbine and gas turbine, the supersonic blade can be used to improve turbomachinery internal aerodynamic characteristics. Method of Characteristics (MOC), which is the most accurate method solving quasi linear partial differential equation, can be used to design the type line of supersonic nozzle which can produce uniform flow at exit plane. This paper presents a method of designing supersonic static blade; MOC and geometric parameter method are used to design the supersonic section and subsonic section respectively. Bezier curve is used to realize the smooth connection of frontal arc segment and supersonic section. When the design of supersonic cascade is done, The simulation and performance analysis of cascade using CFX software, verified the feasibility of this design method。
Keywords: Method of Characteristics Parameterization Transonic and supersonic nozzle Numerical simulation
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No.4663264103457814****
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