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useful pressure
相关语句
  相似匹配句对
     pressure;
     压力;
短句来源
     It's useful for supercritical pressure boiler developing and designing.
     对超临界压力锅炉的研究开发、优化设计有一定参考意义。
短句来源
     The useful adsorbent for pressure swing adsorption is found.
     在此基础上,对改性CO 吸附剂进行评价筛选,得到变压吸附效果较好的吸附剂。
短句来源
     It is useful and simple.
     简单实用。
短句来源
     useful and reliable.
     测量结果可靠.
短句来源
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  useful pressure
The ERI is a useful pressure-derived hemodynamic parameter that correlates with anatomical parameters.
      
The useful pressure work is defined as PQ while the total power consumption is VI.
      
Law thermodynamic efficiency is defined as useful pressure work over total power consumption.
      


The double shell side heat exchanger for use in hydrogenated unit is divided into two kinds of flange type and thread lock ring type.Double shell side heat exchanger is put a longitudinal baffle in the shell of shell side.The baffle goes across the bundle center,and makes the bundle and shell side divided into symmetrical parts,and realize the "pure reverse flow",and the correction factor is approaching to 1.The flow veloccity of shell side medium increases greatly.Then,the overall heat transfer coefficient...

The double shell side heat exchanger for use in hydrogenated unit is divided into two kinds of flange type and thread lock ring type.Double shell side heat exchanger is put a longitudinal baffle in the shell of shell side.The baffle goes across the bundle center,and makes the bundle and shell side divided into symmetrical parts,and realize the "pure reverse flow",and the correction factor is approaching to 1.The flow veloccity of shell side medium increases greatly.Then,the overall heat transfer coefficient is raised and the heat transfer efficiency is increased.The double shell side heat exchanger should be given priority to selection for that situation,such as,the shell side is the side to control heat resistant and the heat transfer of shell side should be strengthen;the useful pressure drop is relatively large,or the temperature difference correction factor is relatively small,and the temperature difference needs to increased; or the quantity of heat exchanger should be decreased.But the fabrication process of double shell heat exchanger is complicated,the first investment is fairly large.

加氢装置用双壳程换热器分为法兰式和螺纹锁紧环式两种。双壳程换热器是在壳程筒体内设置一个纵向隔板 ,隔板穿过管束中心 ,将管束和壳程分为对称的两部分。从而实现了“纯逆流” ,使温差校正系数接近于 1,并使壳程介质的流速大大提高 ,因此提高了总传热系数及换热效率。对于壳程成为控制热阻的一侧且介质流速低 ,需强化壳程传热或壳程可利用压降较大或温差校正系数较小 ,需提高有效温差或需要减少换热器台数等场合 ,应优先选用双壳程换热器。但双壳程换热器制造工艺复杂 ,一次性投资较高

The interaction between laser and material can induce strong shock wave,so a new subject of science and manufacture technology—photomechanics is being founded on the basis of the mechanical effect of laser induced shock wave which is applied in areas such as laser shock shaping and laser spallation measurement.One of the key problems is to enhance the pressure peak value of shock wave effectively,for which the overlay is generally introduced in laser shock processing to improve the shock effect.So it has important...

The interaction between laser and material can induce strong shock wave,so a new subject of science and manufacture technology—photomechanics is being founded on the basis of the mechanical effect of laser induced shock wave which is applied in areas such as laser shock shaping and laser spallation measurement.One of the key problems is to enhance the pressure peak value of shock wave effectively,for which the overlay is generally introduced in laser shock processing to improve the shock effect.So it has important theoretical significance and application value to study the influence of overlays exerting on the shock wave pressure.With respect to rigid overlays,flexible overlays and fluid overlays respectively,we analyze the influence from the aspects of the state of surface of discontinuity of laser induced shock wave,the diffusion of gasified material and plasma and the reflection of shock wave.It is found that overlays do not raise the pressure peak value directly when the pulse width is shorter than the time for the shock wave to cross the gasified material.On the contrary,shot of laser pulse with width longer than the time of shock wave crossing the gasified material heightens the shock effects by heightening the pressure by way of restricting the diffusion of gasified material and plasma and prolonging the acting time of useful pressure through multiple reflection of the shock wave betiseen the surfaces of the workpiece and the overlay.The rigid overlay can raise the pressure peak value of shock wave greatly.But the advantage of the flexible and fluid overlays is the adaptation to the form of the surface of non-planar workpieces.

针对刚性约束层、柔性约束层以及液体约束层,从激光诱导冲击波阵面状态、汽化物(包括气体和等离子体)扩散以及冲击波的反射进行分析,发现对于脉宽小于冲击波通过汽化物层的时间间隔的短脉冲激光,约束层并不能直接提高冲击波的冲量,而对于脉宽大于冲击波通过汽化层时间间隔的激光,其增强冲击效果是通过约束汽化物的扩散,提高压力幅值和由于冲击波在约束层与工件表面的多次反射而延长对工件的作用时间来实现的.刚性约束层能最大地增加冲击冲量,而柔性约束层和液体约束层的主要优点是其形状可与非平面形工件表面符合.

 
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