超音速風洞ノズルの形状最適化 : 第1報,ノズル内の流れ特性に着目した最適化手法の開発(流体工学,流体機械)

抄録

A new procedure has been developed for optimizing the geometry of the supersonic wind tunnel variable nozzle by using computational fluid dynamics (CFD) technologies. In this procedure, the nozzle geometry is optimized by a slight displacement of each jack that supports the nozzle plate from the initial position so that the Mach number deviation from the uniform flow in the measuring region is minimized. The optimum nozzle geometry is gained in a few CFD cases by using the linearity between the jack displacement and the effect on the flow pattern by the displacement. This procedure is applied to Mach number 3.0 and 4.0 nozzles, and improvement of the flow patterns in the measuring region was seen in CFD analyses.