振動葉柵 的英文怎麼說
中文拼音 [zhèndòngyèzhà]
振動葉柵
英文
oscillating cascade-
Assuming the blades conduct a planar simple harmonic motion, the flows in vibrating cascades in the case of different oscillating amplitudes, different reduced frequencies and different torsional centers are computed respectively for two blade profiles. according to comparing flow calculations at different oscillation modes, the influence of the oscillation parameters " selection on aeroelastic performances of cascades is analyzed
假定葉片做平面簡諧運動，針對兩種葉型分別計算了不同振動幅度、摺合頻率及扭心位置時的振動葉柵流場，根據各種振型下流場計算結果的比較，分析了振動參數選取對葉柵氣動彈性性能的影響。The numerical flutter analysis system was formed by the three - dimensional numerical simulation of the vibrating cascade flow combined with the structural dynamics analysis of vibrating blade
將振動葉柵三維流動數值模擬與振動葉片結構動力學分析相結合，建立了葉片顫振數值分析系統。In the end, the situations of work done by aerodynamic forces on blade surfaces when flow - structure is coupled and is n ' t coupled under the same conditions are compared, the result indicates that the work done by aerodynamic forces after the coupling restraint is unloaded has a distinct change
本文最後比較了相同條件下氣固耦合與非耦合時葉表氣動力的做功情況，其結果表明解除耦合約束后氣動力做功有顯著變化，為深入研究振動葉柵流場，必須考慮葉片結構動力因素。Research of unsteady aerodynamic force and oscillating flow field around cascade on shafting torsional vibration
軸系扭振條件下葉柵振蕩流場研究和非定常氣動力的確定Unsteady flow analysis of vibrating cascade under flow structure coupled condition
氣固耦合振動葉柵非定常流動分析研究Second, the structural dynamic equations for blades are introduced in this paper. through numerically solving the aerodynamics - structure coupled equations, a 2 - d unsteady viscous flow in a single cascade is investigated under flow - structure coupled conditions, and a preliminary analysis of the cascade flutter is prosecuted
其次，本文引入葉片結構動力學方程，通過數值求解氣動結構耦合方程體系，研究了氣固耦合條件下葉柵內的二維非定常粘性流動，並初步進行了葉柵的顫振分析。The flows in the case of different reduced frequencies are computed respectively for two blade profiles. by comparing the time curves of relative parameters in oscillating cascades and the flow field contours under different conditions, it is indicated that the reduced frequency is an important factor to determine whether the blade flutter happens or not
針對兩種葉型分別計算了不同摺合頻率下的流場，通過比較振動葉柵相關參數隨時間變化的曲線及流場雲圖，表明摺合頻率是決定葉片顫振與否的重要因素。High - resolution nnd scheme and fully implicit dual - time stepping method were adopted in the three - dimensional vibrating cascade flow calculation. thus, the correct simulation of the shock in transonic flow and the efficiency of calculation were both taken into consideration
在三維振動葉柵流動數值模擬中，採用高解析度tvd類型的格式和全隱式雙時間方法，保證了對流動的正確模擬，準確地捕捉了跨音流動中的激波，其計算效率非常高。The navier - stokes equation is discretized in the moving - grid system. by adopting the explicit four - stage runge - kutta jameson finite volume scheme, and under the sustainment of acceleration algorithms such as dual - time stepping method, the multi - grid strategy and implicit smoothing of the residuals, a two dimensional unsteady viscous flow in vibrating cascades is simulated
本文在運動網格體系中離散n - s方程，應用runge - kutta四步顯式的jameson有限體積格式，並在雙時間方法、多重網格法及殘差光順等加速演算法的支持下，計算了二維振動葉柵非定常粘性流場。By using a finite volume method to solve the navier - stokes equations, two - dimensional vibrating cascade flow was computed
採用有限體（面）積法求解navier - stokes方程，完成了二維振動葉柵流動數值模擬。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
二維分析中發現振動葉柵非定常粘性流動具有較強的非線性特徵，振動誘發的分離渦傳播頻率與葉片的振動頻率不一致。First, a 2 - d unsteady viscous flow in a vibrating cascade is investigated under flow - structure uncoupled conditions
本文首先研究氣固非耦合條件下的振動葉柵內二維非定常粘性流動。Abstract : concerning the models for discribing aerodynamic stability of axial flow compressor, the original model is one - dimensional, and it is reasonable for the onset of surge only. for the onset of rotating stall, there are just some two - dimensional models at published literatures. a three - dimensional aerodynamic of compressor has been presented in this paper. an aerodynamic stability model concerning radial disturbance of compressor is presented. the calculated results show that the occurrence of radial disturbance is related to the axial velocity disturbance, which has important effect on aerodynamic stability of compressor. the position of onset of stall, in blade tip or hub, is dependent upon the characteristics of blade element. the comparisons of calculated results predicted by 2d and 3d aerodynamic stability model have also been made in this paper
文摘:軸流壓氣機的氣動穩定性模型，最初為一維模型，僅適用於描述喘振發作.對于旋轉失速發作，在公開文獻中有一些二維模型發表.本文提出了一類考慮壓氣機徑向擾動對失速影響的新的氣動穩定性模型.計算結果表明壓氣機的軸向擾動往往隨著徑向擾動的產生，徑向擾動的強度影響壓氣機的氣動穩定性，在葉尖還是葉根首先產生失速與壓氣機基元葉柵特性密切相關.本文對軸流壓氣機二維和三維氣動穩定性模型的計算結果進行了對比分析Concerning the models for discribing aerodynamic stability of axial flow compressor, the original model is one - dimensional, and it is reasonable for the onset of surge only. for the onset of rotating stall, there are just some two - dimensional models at published literatures. a three - dimensional aerodynamic of compressor has been presented in this paper. an aerodynamic stability model concerning radial disturbance of compressor is presented. the calculated results show that the occurrence of radial disturbance is related to the axial velocity disturbance, which has important effect on aerodynamic stability of compressor. the position of onset of stall, in blade tip or hub, is dependent upon the characteristics of blade element. the comparisons of calculated results predicted by 2d and 3d aerodynamic stability model have also been made in this paper
軸流壓氣機的氣動穩定性模型，最初為一維模型，僅適用於描述喘振發作.對于旋轉失速發作，在公開文獻中有一些二維模型發表.本文提出了一類考慮壓氣機徑向擾動對失速影響的新的氣動穩定性模型.計算結果表明壓氣機的軸向擾動往往隨著徑向擾動的產生，徑向擾動的強度影響壓氣機的氣動穩定性，在葉尖還是葉根首先產生失速與壓氣機基元葉柵特性密切相關.本文對軸流壓氣機二維和三維氣動穩定性模型的計算結果進行了對比分析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
最後，採用多葉柵通道計算來處理相差周期邊界條件，在分離渦傳播頻率與振動頻率不同時比其它採用簡單相移條件的方法更為合理。分享友人