本文利用数值模拟研究了浮力对湍流预混V形火焰平均速度场的影响,发现浮力效应主要体现在远场区域,而在火焰刷附近非常有限;利用落塔和OH-PLIF方法在正常重力和微重力下观测了火焰皱褶,发现浮力压制火焰皱褶的程度与湍流强度密切相关.分析表明斜压机理是浮力影响火焰皱褶的重要原因.
参考文献
[1] | Aldredge R C;Williams F A .Influence of Wrinkled Premixed-Flame Dynamics on Large-scale,Low-intensity Turbulent Flow[J].Journal of Fluid Mechanics,1991,228:487-511. |
[2] | Sinibaldi JO.;Tulkki AE.;Driscoll JF.;Mueller CJ. .Suppression of flame wrinkling by buoyancy: The baroclinic stabilization mechanism[J].AIAA journal,1998(8):1432-1438. |
[3] | Libby P A .Theoretical Analysis of the Effect of Gravity on Premixed Turbulent Flames[J].Combustion Science and Technology,1989,68:15-33. |
[4] | Bédat B;Cheng R K .Effects of Buoyancy on Premixed Flame Stabilization[J].Combustion and Flame,1996,107:13-26. |
[5] | Cheng R K;Bédat B .Effects of Buoyancy on Lean Premixed V-flames Part Ⅰ: Laminar and Turbulent Flame Structures[J].Combustion and Flame,1999,116:360-375. |
[6] | 王岳,雷宇,张孝谦,J.K(o)nig,C.Eigenbrod.浮力对皱折锋面预混V形火焰的影响[J].燃烧科学与技术,2002(06):493-497. |
[7] | Peters,N.Laminar Flamelet Concepts in Turbulent Combustion[A].Pittsburgh:The Combustion Institute,1986:1231-1250. |
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%