2m超声速风洞结构设计与研究

 2 m超声速风洞是一座下吹-引射式暂冲型超声速风洞,采用全钢结构。针对该风洞具有结构尺寸大、运行工况多、流场品质要求高、试验段和模型更换快捷以及采用全挠性喷管实现宽马赫数范围调节等特点进行了风洞总体和主要部段结构设计与研究。在风洞设计中利用试验方法以及丰富的风洞设计经验对洞体结构设计中的重点、难点问题进行了研究,广泛使用有限元分析方法进行理论计算,采用新颖的刚性烧结金属丝网材料进行消声降噪处理,并用挠性喷管和试验段一体化设计技术排除了挠性喷管与试验段间阶差对流场品质的影响,运用气垫运输技术使试验段和模型更换快捷、稳定。通过水压试验、振动检测、风洞静调和流场校测等方法验证风洞的结构设计是合理的,设计中新材料、新技术的应用是成功的。

Structure Design and Research of 2mSupersonic Wind Tunnel

The 2 m supersonic wind tunnel is an intermittent blowdown-ejector wind tunnel with a full-steel structure. The general structure and main sections are designed and studied based on the characteristics of this wind tunnel, such as large structural size, multiform operational states, high flow quality, quick test section and model conversion, wide Mach number adjustment range for full flexible nozzles, etc. In the course of design, key components and difficult sections are researched by means of testing and solved with our design experiences. Finite element analysis is widely employed for theoretic calculation. A novel multi-layer sinter-wire mesh is used to reduce the strength of current noises, and flexible nozzles and test sections are incorporated in the design to eliminate step influence and improve flow quality, aero-caster movement technology is adopted to convert test sections and models quickly and steadily. Design rationality is proved by structural parameter static state debug,hydraulic testing, vibration inspection and flow quality detection. Applications of new materials and technology are found to be successful.