分离涡 meaning in English
separated vortex
Examples
- There were some intensively nonlinear features in the vibrating cascade flow . the frequency of the separated vortex ' s propagation was not equal to the vibrating frequency of the blade
二维分析中发现振动叶栅非定常粘性流动具有较强的非线性特征，振动诱发的分离涡传播频率与叶片的振动频率不一致。 - At large attack angle the frequency of the vortex has n ' t a apparent zone of " lock - in " . the fluid - induced vibration at large attack angle belongs to the stable dynamic response problems . but a sudden skip of amplitude will occur at large inlet velocity
在大攻角下分离涡脱落的频率没有一个明显的频率锁定区域，流体振动属于稳定的动力响应问题，但在大来流速度下会出现振幅突跳的现象。 - Finally , multi - passage method was adopted to deal with the phase - difference periodic boundary condition . when the frequency of separated vortex propagating is not the same as the vibrating frequency of blade , this method is much more reasonable than those simple phase - shifted periodic condition in single passage
最后，采用多叶栅通道计算来处理相差周期边界条件，在分离涡传播频率与振动频率不同时比其它采用简单相移条件的方法更为合理。 - In the pseudo - time region , high efficient lu - sgs scheme was used in time - marching . cases with uniform or non - uniform inlet stagnation pressure and with or without tip - gap flow were studied . computed results showed that complex structure vortex appeared and secondary flow occurred in the flow of cascade with tip - gap
对进口总压均匀或总压周向亏损(模拟上游尾迹) 、叶尖无间隙或有间隙等三种不同情况的流场计算结果，进行对比分析发现，流场中广泛存在流动分离、分离涡以及二次流，这是引发非定常扰动的根源。 - Firstly , the airfoil ' s classic flutter ( at small attack angle ) , stall flutter ( near the static stall angle ) and response ( at large attack angle ) are analyzed . it is found from the numerical results that " lock - in " will occur at certain freestream velocity range near the static stall angle , where the frequency of the vortex will be equal to the natural frequency and the flutter has the characteristic of self - induced oscillation . when the attack angle is far from the static stall angle , the vortex will have its own frequency , which differs from the natural frequency , and the flutter has the characteristic of forced oscillation
首先研究了二维翼型的古典颤振(小攻角) 、失速颤振(失速攻角)和动力响应问题(大攻角) ，得到以下结论：在静态失速攻角附近的一定来流速度范围内，分离涡会发生频率锁定现象，分离流的频率与固有频率趋于相同，这时的振动呈现自激振动的特点；远离失速攻角时分离流频率则摆脱固有频率的影响，此时的振动具有强迫振动的特点。