撞击流因其独特的流场性质在工业过程中有着广泛的应用.本文采用基于有限差分格式的直接数值模拟程序首先对Re=2500的平面射流进了模拟,得到的结果与实验值相当吻合,验证了程序的有效性;然后对喷嘴间距比L/h=10(L为喷嘴间距,h为喷嘴高度)的受限空间内平面撞击流进行了模拟,发现撞击流中轴向射流和径向射流的剪切层出现了和平面射流类似的涡卷起和配对的现象,并且平均速度场中出现了大尺度的回流区.模拟再现了实验中的偏斜振荡和轴向偏移现象,其中轴向偏移显著地增加了撞击区的轴向脉动.
参考文献
| [1] | Pawlowski RP;Salinger AG;Shadid JN;Mountziaris TJ .Bifurcation and stability analysis of laminar isothermal counterflowing jets[J].Journal of Fluid Mechanics,2006(0):117-139. |
| [2] | Li Weifeng;Sun Zhigang;Liu Haifeng .Experimental and numerical study on stagnation point offset of turbulent opposed jets[J].Chemical Engineering Journal,2008(1/3):283-294. |
| [3] | 孙志刚,李伟锋,刘海峰,于遵宏.平面撞击流振荡特性[J].化工学报,2009(02):338-344. |
| [4] | Lodato G;Domingo P;Vervisch L .Three-dimensional boundary conditions for direct and large-eddy simulation of compressible viscous flows[J].Journal of Computational Physics,2008(10):5105-5143. |
| [5] | Wang ZH;He P;Lv Y;Zhou JH;Fan JR;Cen KF .Direct Numerical Simulation of Subsonic Round Turbulent Jet[J].Flow, turbulence and combustion,2010(4):669-686. |
| [6] | Sonia Besbes;Hatem Mhiri;Georges Le Palec;Philippe Bournot .Numerical and experimental study of two turbulent opposed plane jets[J].Heat and mass transfer,2003(8/9):675-686. |
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%