螺旋进气道特性(涡流比、流量系数)对柴油机性能有重要影响。
The characteristic of helical inlet port including swirl ratio and flow coefficient has an important effect on the performance of diesel engine.
涡流比变化时，燃烧室内的湍动能、流场结构及温度分布有很大的差异。
The turbulent energy, the fluid field structure and the temperature distribution show significant differences with the changes of air swirl ratios.
对某柴油机螺旋进气道进行传统的气道稳流试验，得到了涡流比和流量系数。
The swirl ratio and flow coefficient can be obtained through the traditional steady flow test in diesel helical intake port.
长期以来进气道的设计主要是依靠气道稳流试验测量其涡流比和流量系数来评定气道的性能。
The design of port is depended on steady flow test to obtain swirl ratio and flow coefficient and use them to evaluate the performance of intake port.
该方法可适于任意形状的燃烧室，能反映出喷油压力、喷油嘴结构及安装位置、进气涡流比等参数与燃烧室形状的匹配关系。
The method can be used for combustion Chambers with any shape to match the fuel injection pressure, nozzle construction, injector position and intake swirl ratio with chamber shape.
研究结果表明，在任意可变斜轴涡流控制阀轴线与曲轴轴线夹角情况下，流通系数和无因次斜轴涡流比随着阀片开度的增大而逐渐减小。
The results show that at any Angle between axes of inclined swirl control valve and crank shift, flow coefficient and inclined swirl ratio increase gradually with increase of valve opening.
图像的上部，密西西比三角洲位于正中。浮油似银色的漩涡流向右边。
In the top image, the Mississippi Delta is at image centre, and the oil slick is a silvery swirl to the right.
人们在地球、木星、火星和金星上都发现了极地涡流，它们比周围的气候环境更冷。
Polar vortices are found on Earth, Jupiter, Mars and Venus, and are colder than their surroundings.
试验结果证明，转阀具有导向作用，采用转阀对进气涡流进行调节比用挡板具有更大的调节范围。
Experiment results show that the rotating valve has a guide role and has a broader adjusting range to the intake swirl ratio than the vertical valve has.
试验研究了主、径向涡流器旋流数、面积比、套筒扩张角等参数对双旋流进气装置冷态流场的影响。
The effects of swirl number of primary swirler and radial swirler, area ratio and sleeve divergence angle on the cold flow field of double swirl air intake were investigated.
这些引起了严重的污染问题，因为通过分子扩散的传质比涡流扩散的要慢。
This cause serious pollution problems because mass is transferred less rapidly by molecular diffusion than by eddy diffusion.
并随即变为绕轴心向上的涡流，龙卷中的风总是气旋性的，其中心的气压可以比周围气压低百分之十。
And then up into the swirl around the axis, the wind always Tornado of the cyclone, its central pressure than the surrounding air pressure low 10 percent.
提高空燃比，可增强补燃室中燃气的回流和轴向涡流强度，加大掺混力度，从而提高燃烧效率。
The intensity of the gas backflow and axial swirl ond the dilution in the afterburner are enhanced by increasing the air-to-fuel ratio, and then the combustion efficiency is improved.
本机是根据水力旋涡原理设计而成，比单涡流碎浆机节电40%以上。
The equipment is according to the water power whirlpool principle design, compares with the single whirlpool pulper . It will save electricity above 40%.
本机是根据水力旋涡原理设计而成，比单涡流碎浆机节电40%以上。
The equipment is according to the water power whirlpool principle design, compares with the single whirlpool pulper . It will save electricity above 40%.
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