不同粒径颗粒在涡轮流道内沿程温度及其与叶片的撞击特性研究

doi:10.13675/j.cnki.tjjs.190821

推进技术 ›› 2020, Vol. 41 ›› Issue (8): 1797-1806.DOI: 10.13675/j.cnki.tjjs.190821

不同粒径颗粒在涡轮流道内沿程温度及其与叶片的撞击特性研究

曾飞^1,2,3，宋玉琴⁴

1.北京航空航天大学能源与动力工程学院，北京 100191;2.中国航发湖南动力机械研究所，湖南株洲 412002;3.中小型航空发动机叶轮机械湖南省重点实验室,湖南株洲 412002;4.湖南工业大学理学院，湖南株洲 412007

发布日期:2021-08-15
作者简介:曾飞，博士生，高级工程师，研究领域为航空发动机气动热力。E-mail：82096582@qq.com
基金资助:
湖南省自然科学基金（2019JJ60052）。

Temperature of Particles with Different Diameters along Turbine Flow Path and Impingement Characteristics on Turbine Vanes and Blades

1.School of Energy and Power Engineering,Beihang University,Beijing 100191,China;2.AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002,China;3.Hunan Key Laboratory of Turbomachinery on Medium and Small Aero-Engine,Zhuzhou 412002,China;4.College of Science,Hunan University of Technology,Zhuzhou 412007,China

Published:2021-08-15

摘要/Abstract

摘要： 涡轮叶片表面的颗粒沉积会影响其气动性能和冷却效率，因此很有必要开展颗粒在流道内的运动、温度及其在涡轮叶片表面的撞击特性研究。基于离散相模型，采用CFD数值模拟了涡轮流道内的燃气流动以及不同粒径颗粒在涡轮流道内的运动轨迹与沿程温度变化，并获得了颗粒与涡轮叶片的撞击特性。模拟结果表明，随着颗粒粒径由1μm增加至200μm，颗粒在涡轮流道内的随流性变差，颗粒在流道内的撞击、反弹现象加剧，这促使颗粒在流道内的运动路程整体呈上升趋势；颗粒粒径的增大还会导致颗粒散热能力下降，促使颗粒的沿程温降逐渐降低；同时，颗粒粒径的增大会导致颗粒在导叶片表面的撞击系数上升，而动叶则与之相反。

关键词: 涡轮;颗粒粒径;运动轨迹;沿程温度;撞击特性

Abstract: Particle deposition on a turbine blade influences its aerodynamic performance and cooling efficiency, the particle’s trajectory, temperature along turbine flow path and impingement characteristic on the turbine blades should be researched. The CFD combined with discrete phase model is applied to simulate the gas flow along the turbine flow path, the trajectories and temperatures of particles with different diameters, and finally to obtain the impingement characteristic of particles on the turbine blades. The simulation results indicate that, with the increase of particle diameter from 1μm to 200μm, the flow-following of the particle becomes worse, and the impingement and rebound become more frequent, so that the overall moving distance of the particle in the turbine flow path increases roughly. The increase of particle diameter can also weaken the heat dissipation ability of the particle and suppress the decrease of particle temperature along the process. In addition, the increase of particle diameter can also lead to the rise of impingement coefficient of particles on the vanes, and the decrease of impingement coefficient on the blades.

Key words: Turbine;Particle diameter;Trajectory;Temperature along the path;Impingement characteristic

曾飞，宋玉琴. 不同粒径颗粒在涡轮流道内沿程温度及其与叶片的撞击特性研究[J]. 推进技术, 2020, 41(8): 1797-1806.

ZENG Fei^1,2,3, SONG Yu-qin⁴. Temperature of Particles with Different Diameters along Turbine Flow Path and Impingement Characteristics on Turbine Vanes and Blades[J]. Journal of Propulsion Technology, 2020, 41(8): 1797-1806.

参考文献

[1] Hamed A, Tabakoff W, Wenglarz R. Erosion and Deposition in Turbomachinery[J]. Journal of Propulsion and Power, 2006, 22(2): 350-360.
[2] Brun K, Nored M, Kurz R. Particle Transport Analysis of Sand Ingestion in Gas Turbine Engines[J]. Journal of Engineering for Gas Turbines and Power, 2012, 134(1).
[3] Dring R P, Caspar J R, Suo M. Particle Trajectories in Turbine Cascades [J]. Journal of Energy, 1979, 3(3):161-166.
[4] Richards G A, Logan R G, Meyer C T, et al. Ash Deposition at Coal-Fired Gas Turbine Condition: Surface and Combustion Temperature Effects [J]. Journal of Energy for Gas Turbines and Power, 1992, 114（1）: 132-138.
[5] Wenglarz R A, Fox R G. Physical Aspect of Deposition from Coal-Water Fuels under Gas Turbine Conditions [J]. Journal of Engineering for Gas Turbines and Power, 1990, 112(1): 9-14.
[6] Walsh P M, Sayre A N, Loehden D O, et al. Deposition of Bituminous Coal Ash on an Isolated Heat Exchanger Tube: Effects of Coal Properties on Deposit Growth[J]. Progress in Energy and Combustion Science, 1990, 16（4）: 327-345.
[7] Ai W, Murray N, Fletcher T H, et al. Effect of Hole Spacing on Deposition of Fine Coal Flyash near Film Cooling Holes[J]. Journal of Turbomachinery, 2012, 134(4).
[8] Ai W, Fletcher T H. Computational Analysis of Conjugate Heat Transferand Particulate Deposition on a High Pressure Turbine Vane [J]. Journal of Turbomachinery, 2012, 134(4).
[9] 周君辉, 张靖周. 涡轮叶栅内粒子沉积特性的数值研究 [J]. 航空学报, 2013, 34(11): 2492-2499.
[10] Anon. Ansys Fluent 14.5 Theory Guide[M]. USA: Ansys Inc, 2012:724-746.
[11] 赵静宇. 颗粒在平板气膜冷却壁面沉积机理研究 [D]. 西安：西北工业大学, 2017.
[12] 裴钰. 燃气轮机涡轮叶片表面污染物沉积模型研究 [D]. 天津：中国民航大学, 2016.
[13] Ranz W E, Marshall Jr W R. Evaporation from Drops. I. [J]. Chemical Engineering Progress， 1952, 48(3): 141-146.
[14] Ranz W E, Marshall Jr W R. Evaporation from Drops. II. [J]. Chemical Engineering Progress， 1952, 48(4): 173-180.
[15] Zhengang Liu, Zhenxia Liu, Fei Zhang, et al. An Experimental Study on the Effects of a Film Cooling Configuration and Mainstream Temperature on Depositing[J]. Journal of Thermal Science, 2019, 28(2): 360-369.

不同粒径颗粒在涡轮流道内沿程温度及其与叶片的撞击特性研究

Temperature of Particles with Different Diameters along Turbine Flow Path and Impingement Characteristics on Turbine Vanes and Blades

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 0

编辑推荐

Metrics

本文评价