后向台阶流的流场同时具有非定常性和定常性的特性。
It is indicated that the flow field over a backward facing step possesses simultaneously the characteristic of non-steady flow and steady flow.
结果表明流动非定常性产生额外损失，滞回现象存在于叶轮机中。
The results indicate that the flow unsteadiness bring out extra losses, and time lag phenomena are evident in many circumstances.
它是一个复合向量，具有明显的空间分布的非均一性和随时间变化的非定常性。
It is a complex vector which have obvious heterogeneity of the distribution in space and a variability with time.
工程上应用的大气污染物扩散模式中，熏烟模式由于其非定常性而与其他扩散模式有很大的区别。
The atmospheric pollutant dispersion models applied to engineering greatly differs from other dispersion models due to their unsteady flows.
大攻角流场内部的能量主要集中在低频范围内，高频成分引起的非定常性对大攻角流动的影响较弱；
Present study on flow characteristics at high incidence shows that: energy in the flow field over slender bodies at high incidence is centralized to low frequency.
由于船体的影响，双桨船的螺旋桨处于斜向来流的条件下运转。斜流造成螺旋桨叶工作状态的非定常性。
Because of the influence of the hull, the stern propeller of a twin-screw vessel is working under condition of oblique flow, and the unsteady working condition of the blade of a propeller is created.
计算结果表明，运动的非定常性对升力面的流体动力特性具有显著的影响，工程应用中对此需要加以考虑。
Calculation results show that the unsteady motion has pronounced influences on the hydrodynamic characteristics of the lifting surface, a phenomenon deserving due consideration in applied engineering.
小叶片将大叶片通道分成的两个通道具有不同的流量和负荷，通道之间的负荷分配对于流动的非定常性会产生较大影响；
The analysis shows that differences of mass flow and pressure rise between the two splitter-splitted passages have significant influence on unsteady flow in the compressor stage.
小叶片将大叶片通道分成的两个通道具有不同的流量和负荷，通道之间的负荷分配对于流动的非定常性会产生较大影响；
The analysis shows that differences of mass flow and pressure rise between the two splitter-splitted passages have significant influence on unsteady flow in the compressor stage.
应用推荐