摘要
使用热线测速技术以高于湍流最小时间尺度的分辨率,精细测量了MD-82飞机客舱环境中的条缝型送风口射流流场和个性化送风口射流流场.对流场的平均速度剖面、湍流度分布、湍能谱进行了分析.平均速度的变化揭示了离开出口后流场速度的衰减规律.湍流度表明了湍流流场脉动剧烈程度和湍流扩散发展规律,是各种尺度的脉动分量叠加的结果.对流场的湍能谱分析展现了惯性子区的存在,能量从大尺度的含能区通过惯性子区传递给小尺度结构并最终耗散为热能.
The slit jet flow and personalized jet flow in the MD-82 aircraft cabin environment are finely measured by constant-temperature anemometry system with the resolution higher than the smallest time-scale of turbulence. Mean velocity profiles, turbulence intensity distributions and turbulence energy spectrum are analyzed. The variation of mean velocity reveals the decaying of the velocity beyond the outlet. Turbulence intensity evolutions indicate that the degrees of fluctuations are the result of the superimposition of many fluctuations with different scales. The turbulence energy spectrum shows that the inertial sub-range exists. The energy from the energy-containing large scale is cas- caded to the small scale through the inertial sub-range, which is finally dissipated into heat.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2013年第1期2-7,共6页
Journal of Tianjin University(Science and Technology)
基金
国家重点基础研究发展计划(973计划)资助项目(2012CB720100)
国家自然科学基金资助项目(10832001
11272233)
中国科学院力学研究所非线性国家重点实验室对外开放课题联合资助项目
关键词
湍射流
热线测速技术
湍能谱
机舱环境
turbulent jet flow
hot-wire anemometry
turbulence energy spectrum
aircraft cabin environment
