Experiment of grid-generated turbulent ina smooth channel

袁星; 黄维娜

doi:10.13224/j.cnki.jasp.2019.01.004

Chinese

您当前的位置：

首页 >

文章列表页 >

Experiment of grid-generated turbulent ina smooth channel

更新时间：2026-07-07

- Experiment of grid-generated turbulent ina smooth channel
- Vol. 34, Issue 1, Pages: 27-33(2019)
- 作者机构：
  
  1. 北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室,北京,100191
  2. 先进航空发动机协同创新中心,北京,100191
- 作者简介：
- 基金信息：
- DOI：10.13224/j.cnki.jasp.2019.01.004
  CLC：
- Published：2019
- 稿件说明：
移动端阅览
袁星, 黄维娜. 光滑通道内格栅湍流特性实验[J]. 航空动力学报, 2019, 34(1): 27-33.

doi: 10.13224/j.cnki.jasp.2019.01.004
袁星, 黄维娜. 光滑通道内格栅湍流特性实验[J]. 航空动力学报, 2019, 34(1): 27-33. DOI： 10.13224/j.cnki.jasp.2019.01.004.

doi: 10.13224/j.cnki.jasp.2019.01.004 DOI：

摘要

为了更好地模拟实际涡轮叶片内冷通道的流动换热，采用格栅对光滑通道内湍流度进行控制。并通过实验的方法对不同格栅尺寸激发的湍流度进行测量。实验中，在边长为80mm×80mm的方形通道中，放置了3种不同尺寸的格栅，利用热线风速仪，得到了通道雷诺数为5000~30000范围内的格栅后下游湍流特性。研究发现：流体通过该格栅后，气流在流经格栅后较短距离内就获得了4.5%的湍流度，同时湍流度沿程呈现衰减趋势，雷诺数对湍流度的影响较小。湍流积分时间尺度与雷诺数呈负相关的关系。

Abstract

In order to simulate the flow and heat transfer in a turbine coolant channel

grids were used to control the turbulent intensity in a smooth channel. Different sizes of grids were used to generate different turbulence intensity. In the experiment

three different kinds of grids were put in a square smooth channel with the cross-section of 80mm×80mm. Hot-wire was used to measure the turbulence with Reynolds ranging from 5000 to 30000. The results showed that after flowing through the grids

the turbulent intensity can be up to 4.5%

and decreased along the stream-wise directions. The effect of Reynolds numbers on turbulent intensity is not obvious in the current work. And the turbulent integral time scale has a positive relationship with Reynolds numbers.

关键词

Keywords

references

Views

881

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

PREDICTION OF TURBULENT SEPARATED FLOWS WITH A LOW REYNOLDS NUMBER NONLINEAR K-ε MODEL

组合式弹性金属密封泄漏特性实验研究与结构优化

基于三维接触摩擦单元的套齿连接解析建模研究

考虑多源不确定性的复合材料风扇叶片高周疲劳失效概率评估

与发动机匹配的旁路式双喉道气动矢量喷管数值模拟研究

Related Author

Zhu Guangsheng

Zhang Yuelin

Sun Rong

Zhao Guang

Related Institution

Nanjing University of Science and Technology

AI问答

Postal code：100079
Tel：（010）53879206 Email：tmw@bjxintong.com.cn
Technical support is provided by Beijing Founder electronics co., LTD 京ICP备09082226号-64 京公网安备11010602201714号
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰