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宋远佳,赖欢,陈万华,等. 低温风洞防护结构设计与强度校核[J]. 科学技术与工程, 2020, 20(32): 13460-13465.
Song Yuan-jia,et al.Design and strength check on protective structure in cryogenic wind tunnel[J].Science Technology and Engineering,2020,20(32):13460-13465.
低温风洞防护结构设计与强度校核
Design and strength check on protective structure in cryogenic wind tunnel
投稿时间:2020-04-30  修订日期:2020-05-29
DOI:
中文关键词:  低温风洞  防护结构  设计  强度校核
英文关键词:cryogenic wind tunnel  protective structure  design  strength check
基金项目:国家自然青年科学基金项目
           
作者单位
宋远佳 中国空气动力研究与发展中心
赖欢 中国空气动力研究与发展中心
陈万华 中国空气动力研究与发展中心
张伟 中国空气动力研究与发展中心
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中文摘要:
      防护结构作为低温风洞内绝热系统的一个重要的子系统,具有隔绝绝热单元与低温介质,降低冷量损耗,形成气流通道的作用。然而,其在风洞运行过程中不断承受着风洞运行的低温载荷和交变压力载荷,为此,本文重点开展了防护结构设计和强度校核研究。首先,对防护结构进行了总体设计,明确了各部件尺寸和材料;然后,建立了防护结构三维有限元模型,根据低温风洞运行的最恶劣工况对防护结构进行了强度分析;最后,对防护结构进行了低温环境下的交变压力冲击试验。结果表明:设计的防护结构满足风洞运行工况下的强度要求,但在支撑件附近存在冷量损耗,这对我国将来自主开展大型低温风洞的设计建设具有重要的借鉴意义。
英文摘要:
      Protective structure, acted as an important subsystem of internal insulation system in cryogenic wind tunnel, is in possession of such functions as isolating insulation unit from cryogenic media, reducing cold energy loss and forming the airflow channel. However, the protective structure is continuously subjected to the temperature load and alternating pressure load during the operation of wind tunnel. Thus, the design and strength check on protective structure are intensively investigated. Firstly, the protective structure is designed and the corresponding sizes and materials are determined. Then, according to the worst working condition of cryogenic wind tunnel, the three dimensional finite element model of protective structure is built and the strength check is conducted. Finally, the alternating pressure impact test under cryogenic environment is carried out on protective structure. The obtained results show that the designed protective structure is conformed to the strength requirement of cryogenic wind tunnel in service, but the cold energy loss occurs nearby the support component, which can pay the way for building the large cryogenic wind tunnel of our country in the future.
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