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- wall pressure fluctuation 脉动壁压
- Keywords entrainment;turbulent flow;unsteady;wall pressure fluctuations;large-scale vortical structures; 引射;湍流;非定常;壁面压力脉动;大尺度旋涡结构;
- It was found that properties of pressure fluctuation at different axial positions are different under specif... 发现在一定操作条件下,床层不同轴向位置上压强的脉动特征不同,而不同径向上压强的脉动特征则基本相似。
- The plume fluctuation over laser keyhole arises from the pressure fluctuation of keyhole gas. 小孔的波动起伏与小孔内气流压力的不断变化密切相关。
- wall pressure fluctuations 壁面压力脉动
- Several apparatuses for improving extrusion, such as gear pump,pressure fluctuation controller,die thickness regulator, etc. , were introduced. 介绍了几种能够提高塑料挤出制品精度的技术与装置,其中包括齿轮泵、压力波动控制器、口模厚度自动调节装置等。
- The mixing chamber of headbox plays an important role in homogenizing pulp flow and stabilizing pressure fluctuation of pulp. 混合室在流浆箱中起着均匀浆流、稳定压力的重要作用,而混合室的长度是混合室设计中的重要参数。
- The writers analyze the causes for oil pressure fluctuation and its harm and puts forward appropriate preventive measures. 笔者就油压波动的原因及危害进行了分析,提出了相应的防范措施。
- The area contraction ratio has obvious influence on the flow pattern, discharge, wall pressure and air pressure inside level rotary flow. 研究发现面积收缩率对流态、泄流量、壁面压强和空腔内的气体压强均有较大的影响。
- Flow parameters such as phase holdup and pressure fluctuation, as well as their axial and radial distributions were measured at different superficial phase velocities. 在配料固相质量分数为29%25的条件下，实验测定了不同操作条件下反应器内的轴、径向相含率及其分布，轴、径向压强脉动，初步揭示了分布器以及操作条件对局部流动参数的效应。
- The systoltic wall pressure and its dp/dt were higher than diastolic wall pressure and its dp/dt. 收缩期的血管壁面压力比舒张期的血管壁面压力具有更大的量值和变化幅度；
- Sensitive pressure transducer was used to record the combustion pressure fluctuation in furnace to study the combustion pressure fluctuation of “puffs” in stoker. 针对层燃炉冒正压时的燃烧“喘息”现象,利用微压传感器对炉膛燃烧压力波动进行了测量,采用自相关函数结合功率谱密度的方法分析了频谱特征。
- With an example, the theoretical principle for designing accumulator absorbing pressure fluctuation is presented by analyzing the dynamic characteristics of hydraulic system. 摘要针对蓄能器的应用，通过实例，从分析液压系统动态特性的角度，阐明设计蓄能器吸收压力脉动时应遵循的理论依据。
- The hydrodynarnic wall pressure prepuced by aerated flow splitting pier and its cavitation atmiddle-lower Frond number are studied through series of model tests. 本文通过系列比尺模型研究了中、低佛氏数下掺气分流墩墩头动水壁压及空化特性，得到墩头时均和脉动壁压的分布规律、脉动壁压概率分布及墩头初生空化数等。
- Results indicated that the increasing of dust removal periodic time lead to higher dust removal efficiency, larger pressure drop and bigger pressure fluctuation. 实验证明，随着清灰周期的增大，颗粒层除尘效率提高，同时压力损失和压力波动幅度也随之增大。
- It is recommended that inflatable sac should be used to replace the soft side wall pressure sensor be used to take the place differential manometer. 最后就渗透测定仪装置提出几条改进建议：用充气气囊代替柔性侧壁，用差压计代替微压计。
- The properties and components of pressure fluctuation signals in coarse circulation fluidized bed was researched by power spectrum analysis,R/S analysis and chaos analysis. 应用功率谱分析法、R/S分析法及混沌分析法对大颗粒循环流化床压力波动信号的性质和组成进行了研究。
- DOES THE PRESSURE FLUCTUATE FROM LESS THAN 5 PSI TO 120-150 PSI? 压力从小于5PSI波动到120－150PSI了吗?
- Should the pump pressure fluctuate very often, what could be done? 万一泵压忽高忽低,应该怎么办?
- The PID control and parameter verification is realized by computer for height tracing system of auto submerged arc welding of thick wall pressure vessel. 对大厚度压力壳自动埋弧焊高度跟踪系统,应用计算机实现了PID控制算法和参数整定;
