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高压气体定容积充放气的特性 被引量:27
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作者 杨钢 徐小威 +1 位作者 高隆隆 李宝仁 《兰州理工大学学报》 CAS 北大核心 2010年第3期42-46,共5页
针对高压状态下理想气体模型不能较精确描述实际气体特性的问题,基于范德瓦尔方程和气体动力学方程,推导出实际气体节流口质量流量的特性方程,建立高压气体定容积充放气过程的数学模型.在此基础上与理想气体模型进行了比较,气体充放气... 针对高压状态下理想气体模型不能较精确描述实际气体特性的问题,基于范德瓦尔方程和气体动力学方程,推导出实际气体节流口质量流量的特性方程,建立高压气体定容积充放气过程的数学模型.在此基础上与理想气体模型进行了比较,气体充放气过程的仿真分析表明,低压情况下二者的仿真结果基本吻合,随着气体压力增加所建立模型的仿真结果更加符合实际. 展开更多
关键词 高压气体 实际气体 质量流量特性 充放气
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Characterization of turbulent flux transfer over a Gobi surface with quality-controlled observations 被引量:9
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作者 ZHOU DeGang HUANG RongHui 《Science China Earth Sciences》 SCIE EI CAS 2011年第5期753-763,共11页
This study evaluates the spatial distributions in the quality of momentum and sensible heat fluxes,and determines the turbulent transfer characteristics with quality-controlled observations.The research is based on ra... This study evaluates the spatial distributions in the quality of momentum and sensible heat fluxes,and determines the turbulent transfer characteristics with quality-controlled observations.The research is based on raw turbulence data collected over a Gobi surface in the Dunhuang area in June 2004.The results indicate that part of the momentum fluxes are of poor quality in the daytime and nighttime.The poor quality of the momentum fluxes in the daytime is mainly attributed to the development of turbulence.The footprint reveals that,in general,the momentum fluxes and sensible heat fluxes can be measured well in the east and west upwind sectors under unstable conditions.The relationship between the non-dimensional standard deviation of the wind components and atmospheric stability follow the "1/3 power law",which supports the Monin-Obukhov similarity theory.Moreover,this study identifies a clear disturbance in the measurements surrounding the Gobi surface.The momentum roughness length of z0m=0.59 mm is determined after excluding such disturbance,and the additional resistance during the daytime is proposed to be an average of 3.1,although its actual value is highly scattered.This study discusses the applicability of several thermodynamic parameterization schemes for the Gobi surface.The results show that the scheme κB-1=3.1 can represent well the summer diurnal turbulent heat transfer. 展开更多
关键词 Gobi surface turbulent transfer surface roughness length quality control
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