A new polysonic wind tunnel has been designed and constructed at Saint Louis University. The flow paths and flow conditioning needs were designed by PhD students and the structural design and manufacturing were accomplished by local pressure vessel and manufacturing firms. Starting with a set of two 25 hp air compressors, an air filter and dryer system with an operating pressure range between 100–200 psia, and a 14 m³ storage tank, the total cost for additional components and labor was on the order of $750,000, where design and installation was completed in approximately 18 months. The facility is uniquely reconfigurable to accommodate straight and curved flow paths, with existing configurations supporting a supersonic shock wave-boundary layer interaction study in a rectangular channel and another study of a transonic linear cascade of high-pressure turbine airfoils. The design process and resulting components are described herein, and include how to improve supersonic nozzle design by adjusting for displacement thickness growth as well as how to diagnose and correct choked flow conditions which existed in the first iteration of the flow path circuit. Results also include a sample schlieren image of a normal shock wave-boundary layer interaction and airfoil static pressure distributions and total pressure ratio across the turbine showing successful configuration implementations.

圣路易斯大学设计并建造了一个新的多音速风洞。流动路径和流量调节需求由博士生设计，结构设计和制造由当地压力容器和制造公司完成。从一组两台 25 hp 空气压缩机、一个工作压力范围在 100–200 psia 之间的空气过滤器和干燥器系统以及一个 14 m ³储罐，额外组件和人工的总成本约为 750,000 美元，其中设计和安装在大约 18 个月内完成。该设施独特地可重新配置以适应直线和弯曲的流动路径，现有配置支持矩形通道中的超音速激波-边界层相互作用研究和高压涡轮机翼型跨音速线性叶栅的另一项研究。此处描述了设计过程和产生的部件，包括如何通过调整位移厚度增长来改进超音速喷嘴设计，以及如何诊断和纠正流路回路的第一次迭代中存在的阻塞流条件。