涡流比是用来衡量发动机气缸内空气运动的参数之一。
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.
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