采用具有三阶精度TVD性质的有限差分格式、自由型曲面网格技术、分区算法以及双时间步长的方法,对某型涡轮级叶栅流场进行了非定常NS方程数值求解,考察了在有、无冷气喷射条件下涡轮级气动性能的非定常变化.结果表明,上游静叶栅是否喷射冷气对下游动叶栅超音速区域的影响具有明显的区别,有冷气喷射时动叶栅前缘气动负荷降低,级效率下降约1%,但是不同动叶通道内气动性能随时间周期性变化的幅度明显减小了.
参考文献
[1] | H Du;J Han;S Ekkad .Effect of Unsteady Wake on Detailed Heat Transfer Coefficient and Film Effectiveness Distributions for a Gas Turbine Blade[R].ASME Paper,1997. |
[2] | H Seo;J Lee;P Ligrani .Effects of Bulk Flow Pulsations on Film Cooling from different Length Injection Holes at Different Blowing Ratios[J].Journal of Turbomachinery,Transactions of the ASME,1992,123:81-89. |
[3] | R Denos;T Arts;G Paniagua .Investigation of the Unsteady Rotor Aerodynamics in a Transonic Turbine Stage[R].ASME 2000-GT-0435,2000. |
[4] | F. Didier;R. Denos;T. Arts .Unsteady Rotor Heat Transfer in a Transonic Turbine Stage[J].Journal of turbomachinery,2002(4):614-622. |
[5] | W Stefan;F Leonhard .An Experimental Investigation On The Influence of Periodic Unsteady Inflow Conditions On Leading Edge Film Cooling[R].ASME 2002-GT-30202,2002. |
[6] | 王松涛.叶轮机三维粘性流场数值方法与弯叶片内涡系结构的研究[M].Harbin:Harbin Institute of Technology,1999 |
[7] | David A. Caughey .Implicit multigrid computation of unsteady flows past cylinders of square cross-section[J].Computers & Fluids,2001(7/8):939-960. |
[8] | 施法中.计算机辅助几何设计与非均匀有理B样条[M].北京:北京航空航天大学出版社,1994 |
[9] | 王松涛,颜培刚,孙玺淼,韩万金,王仲奇.涡轮叶栅冷气掺混数值模拟方法[J].航空动力学报,2003(04):558-562. |
[10] | P Adami;F Martelli .Numerical Predictions of Film Cooled NGV Blades[R].ASME 2003-GT-30861,2003. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%