查询词典 air pressure

ABSTRACT This paper analyzes mid-pressure gas injectors of LPG/air mixture with thermodynamic principle using the law of conservation of momentum, and establishes characteristic equation of mid-pressure gas injectors under the optimum conditions.

根据动量守恒原理，对液化石油气混空气中压引射器进行热力学分析，并建立了最佳结构条件下中压燃气引射器特性方程。

High-pressure air is pulled into a low-pressure center.

高压的空气被推进低压的中心。

In virtue of Fluent of CFD software, we carry though computation of aerodynamics of an air-to-air missile in different Mach meter and different attack angle and gained movement trend of lift coefficient、drag coefficient and pitching moment coefficient with variety of Mach number and attack angle, meanwhile, we also obtain distributing trend of pressure, temperature and weather velocity.

借助于商业CFD软件FLUENT，对某型空空导弹在不同攻角、不同飞行马赫数的气动力进行了计算，得出了该型导弹升力系数、阻力系数和俯仰力矩系数随飞行马赫数和攻角的变化规律以及导弹表面的压力分布、温度分布和来流速度分布。

Numerical simulation and experimental research show that, when air flows over the surface of the truck, around the head of it there exists a positive pressure area which is a main contributor to the pressure-difference drag of the truck.

通过数值模拟和试验研究表明，气流在绕流汽车表面时，在汽车头部存在压强较大的正压区，该区是对汽车压差阻力贡献较大的区域。

It is also shown that one of the most important reasons of the heavy rain amplification is the cold air which spreads to south from midlatitude in the lower troposphere and transports into the typhoon low pressure. The study of PV on isentropic surface shows the active state of the midlatitude cold air. The tropopause folding, which means that high PV spreads downward from the upper troposphere or stratosphere, helps the releasing of potential instability energy and the development of rainstorm.

分析表明：对流层低层中高纬度冷空气扩散南下在台风低压环流区附近的"侵入"作用是此次特大暴雨过程的最重要的原因之一；等熵面位涡的分析进一步说明了中高纬地区冷空气的活动状况；对流层高层或平流层低层高位涡的下传有利于位势不稳定能量的释放，使得暴雨增幅。

During the winter months, the mean temperature is lower than other regions located on the same latitude, due to the expansion of high-pressure air masses formed over inland Siberia, whose strong northwesterly winds bring dry, cold air into Korea.

冬天 (12-2 月)受地形影响。由于寒冷的西伯利亚高气压和偏西风影响温度比同纬度的其他国家要低。

This paper introduces the composition and operational principle of an Air Com- pressor constant pressure air supply system based on PLC and converter.

本文介绍了一种基于PLC与变频器的空压机恒压供气系统的工作原理与构成。

The pressure ridge partly moved to southeast, it led to the cold air stream more moved to southeast, and the strong cold wave broke out. The water vapor from Caspian sea to Bslkhash lake accumulated at the upper of north Xinjiang, and it provided the water vapor condition for the cold wave. The ECMWF numerical forecast product accurately predicted the evolution trend of circulation (the position, intensity, path and speed of ground surface cold high pressure) of height field in this cold wave process. The predicted temperature at 850 hPa had good corresponding relation with the actual lowest temperature.

高压脊部分东南垮，导致强冷空气大举东南下，强寒潮天气暴发；里海到巴尔喀什湖的水汽在北疆上空聚积，为这次寒潮天气提供了水汽条件；ECMWF数值预报产品在这次强寒潮天气过程中准确的预报了高度场的环流场演变趋势，地面冷高压的位置、强度、路径和移速；850 hPa格点温度预报值与最低温度实况值具有很好的对应关系。

Pilot-operated pressure regulating valve the air is normally provided by a small supply of direct-acting pressure reducing valve.

先导式减压阀的调压空气一般是由小型的直动式减压阀供给的。

The check valve avoids refluence of air in pipe- lines and consequent pressure loss in which compressed air is intended to flow in one direction only.

单向阀能防止管路中的空气回流，以及随之而来的因压缩空气朝这一方向流动而产生的压力损失。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。