采用相多普勒颗粒分析仪(PDPA)测量了雷诺数为8500的两相圆湍射流速度场,研究了两种大粒径颗粒对湍流的调制作用.发现在相同气载比条件下,大粒径颗粒加入后,在射流近场区域(X/D<10)气相湍流度增强,沿着射流中心轴线轴向和径向气相湍流度增强;较小粒径颗粒加入后削弱气相湍流度.在射流远场X/D=20截面,较大粒径颗粒的加入会削弱气相湍流度,但其削弱程度不如小粒径颗粒.随着粒径的增大,两相射流湍流的气相湍流度进一步增加.
参考文献
| [1] | Levy Y;Lockwood F C .Velocity Measurement in a Particle Laden Turbulent Free Jet[J].Combustion and Flame,1981,40:2313-2320. |
| [2] | Tsuji Y;Morikawa Y .LDA Measurements of an Air-Solid Two-Phase Flow in a Horizontal Pipe[J].Journal of Fluid Mechanics,1982,120:385-409. |
| [3] | Tsuji Y;Morikawa Y;Shiomi H .LDV Measurements of an Air-Solid Two-Phase Flow in a Vertical Pipe[J].Journal of Fluid Mechanics,1984,139:417-434. |
| [4] | Sheen H J;Jou B H;Lee Y T .Effect of Particle Size on a Two-Phase Turbulent Jet[J].Experimental Thermal and Fluid Science,1994,8:315-327. |
| [5] | Modarress D;Tan H;Elghobashi S .Two-Component LDA Measurement in a Two-Phase Turbulent Jet[AIAA Paper][R].,1984. |
| [6] | 燕小芬 .气固两相圆湍射流场流动特性的PDPA实验研究[D].北京:清华大学航天航空学院,2006. |
| [7] | 崔金雷 .气固两相圆湍射流相间调制规律的实验研究[D].北京:清华大学航天航空学院,2004. |
| [8] | Cui JL;Zhang HQ;Wang B;Rong Y;Wang XL .Flow visualization and laser measurement on particle modulation to gas-phase turbulence[J].Journal of visualization,2006(3):339-345. |
| [9] | YAN X F;CHAN C K;WANG B.Experimental Study on Turbulent Modulation by Particle MassLoading-Ratio in a Two-Phase Turbulent Round Jet[A].香港,2007:1-4. |
| [10] | Hetsroni G .Particles-Turbulence Interaction[J].International Journal of Multiphase Flow,1989,15:735 747. |
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%