Flow characteristics of radial jet from two opposed jets

LI Weifeng; SUN Zhigang; LIU Haifeng; WANG Fuchen

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Flow characteristics of radial jet from two opposed jets

更新时间：2025-12-10

- Flow characteristics of radial jet from two opposed jets
- CIESC Journal Issue 10, Pages: 2453-2459(2009)
- 作者机构：
  
  华东理工大学资源与环境工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 October 2009，
  
  Published：05 October 2009
- 稿件说明：
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LI Weifeng, SUN Zhigang, LIU Haifeng, et al. Flow characteristics of radial jet from two opposed jets[J]. CIESC Journal, 2009, (10): 2453-2459.
DOI：

LI Weifeng, SUN Zhigang, LIU Haifeng, et al. Flow characteristics of radial jet from two opposed jets[J]. CIESC Journal, 2009, (10): 2453-2459. DOI：

摘要

对喷嘴间距与喷嘴直径比为0.5～100范围内两喷嘴对置撞击流径向射流的湍流脉动特征、速度分布和扩展率等进行了实验研究和数值模拟。研究结果表明，撞击流径向射流明显较自由射流湍动强烈;从驻点开始径向射流速度逐渐增大到最大值后开始衰减，射流呈现自相似性;随着喷嘴间距增大，撞击流径向射流的扩展率呈现增大的趋势，大约为自由圆射流的1.5～3倍。采用CFD软件对撞击流径向射流的速度分布特征进行了数值模拟，与实验结果相比，两方程湍流模型预报的撞击流径向射流的扩展率明显偏小，雷诺应力模型的预报精度有较大改进。

Abstract

The fluctuation

velocity distribution and spread rate of the radial jet from two opposed nozzles at L/D＝0.5—100 were experimentally investigated and numerically simulated

whereL is the length of two nozzles separation and D is the nozzle diameter.Results show that the turbulence intensity of the radial jet is obviously higher than that of free jet.The velocity of the radial jet increases to a maximum from the stagnation point then decays and exhibits a selfsimilarity.With the increase of the nozzle separation

the spread rate of the radial jet increases

and is about 1.5—3 times as that of free round jet.The velocity distributions of the radial jet from two opposed nozzles were numerically simulated by CFD.Compared to experimental results

the spread rate is obviously underpredicted by two-equation turbulence models

and the prediction by Reynolds stress model (RSM) is improved..

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LI Weifeng

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Related Institution

中国石油大学（北京）重质油国家重点实验室

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