Effect of reynolds number on turbine cascade flow 雷諾數(shù)對渦輪葉柵流動的影響
Numerical simulation of unsteady vortex in the wake of cascade flow 葉柵流場尾跡中非定常渦系的數(shù)值模擬
Compressible cascade flow 可壓縮葉柵氣流
By using a finite volume method to solve the navier - stokes equations , two - dimensional vibrating cascade flow was computed 采用有限體(面)積法求解navier - stokes方程,完成了二維振動葉柵流動數(shù)值模擬。
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(shù)值模擬與振動葉片結(jié)構(gòu)動力學(xué)分析相結(jié)合,建立了葉片顫振數(shù)值分析系統(tǒng)。
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(fā)現(xiàn)振動葉柵非定常粘性流動具有較強的非線性特征,振動誘發(fā)的分離渦傳播頻率與葉片的振動頻率不一致。
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(shù)值模擬中,采用高分辨率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。
Because the cascaded flow - thought delay time . daily power benefit has affected not only by previous day but by next day , daily power benefit is composed of " plant day " part and " effect day " part . based on the theory analysis , author developed a program what can well describes the cascaded reservoir short - term optimistic dispatch system model 由于梯級水流滯時的存在,日發(fā)電效益既受前日影響,也影響次日,為考慮水流滯后帶來的影響,將日發(fā)電效益視為兩部分組成: “計劃日”部分和“影響日”部分。