涡轮叶栅通道内颗粒物沉积过程的数值模拟

doi:10.7527/S1000-6893.2016.0237

流体力学与飞行力学

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涡轮叶栅通道内颗粒物沉积过程的数值模拟

杨晓军^1,2, 祝佳雄²

1. 中国民航大学航空工程学院, 天津 300300;
2. 中国民航大学中欧航空工程师学院, 天津 300300

收稿日期:2016-06-14 修回日期:2016-08-15 出版日期:2017-05-15 发布日期:2016-12-21
通讯作者: 杨晓军 E-mail:xiaojunyoung@hotmail.com
基金资助:
国家自然科学基金委员会与中国民用航空局联合资助项目（U1633113）；天津市应用基础与前沿技术研究计划（14JCQNJC06800）；中央高校基本科研业务费（ZXH2012H004）

Numerical simulation of particle deposition process inside turbine cascade

YANG Xiaojun^1,2, ZHU Jiaxiong²

1. College of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China;
2. Sino-European Institute of Aviation Engineering, Civil Aviation University of China, Tianjin 300300, China

Received:2016-06-14 Revised:2016-08-15 Online:2017-05-15 Published:2016-12-21
Supported by:
Joint Funds of the National Natural Science Foundation of China and Civil Aviation Administration of China (U1633113);Tianjin Research Program of Application and Advanced Technology (14JCQNJC06800);the Fundamental Research Funds for the Central Universities (ZXH2012H004)

摘要/Abstract

摘要：

为了更加准确获得颗粒物在涡轮中的沉积分布，以某涡轮叶片为模型，选用最接近航空发动机内部颗粒组成的Jim Bridger Power Station（JBPS）颗粒为污染物，同时，利用C++编写合适的User Defined Function（UDF）经过调试来分析颗粒沉积后叶片边界的复杂变形和边界网格依赖于时间变化的重构生成，在考虑每个时间步长颗粒沉积在叶片上从而改变叶片几何特性和换热特性的情况下，来深入研究颗粒物沉积在叶片的整个过程，最终得出了沉积的分布情况，并且通过数值研究结果与实验结果的对比，验证了网格重构与融合程序的合理性、准确性。根据叶片变形情况预测腐蚀的发生情况。随后，改变主流温度、颗粒直径来研究颗粒沉积特性。结果表明：颗粒主要沉积在叶片压力面中部，但会使得叶片前缘和压力面中部均产生明显变形；叶片前缘由于颗粒沉积使得粗糙度增加形成锯齿形，最先遭受腐蚀；颗粒直径影响颗粒沉积的分布与沉积生长速度；只影响沉积速度，并不改变沉积分布。

关键词: 沉积, 变形, UDF, 腐蚀, 涡轮叶片, 粒径, 数值模拟

Abstract:

A numerical simulation is conducted to obtain more accurate distribution of particle deposition on turbine blade with Jim Bridger Power Station (JBPS). C++ is used to code suitable User Defined Function (UDF), which reconstructs grids to accomdate complex boundary deformation in every time step. In such a way that deposition can change geometry features and heat transfer characteristics, and the whole deposition process on blade can be analyzed and the exact deposition distrbution can be obtained. A fair comparison of numerical results with existing experimental results shows the rationality and accuracy of grid reconstruction code. On the basis of deposition distribution and geometry deformation of turbine blade, the erosion area on the blade is predicted. Thereafter, the effect of mainstream temperature and particle diameter is analyzed. The research results show that the main deposition occurs on the central area of blade pressure side, whereas there is obvious deformation in leading edge and central area. The obvious deformation reveals that roughness is increased and erosion is more severe on leading edge. The diameter of particle has important influence on particle deposition and deposition rate, whereas temperature of mainstream only has influence on deposition rate.

Key words: deposition, deformation, UDF, erosion, turbine blade, particle diameter, numerical simulation

中图分类号:

V231.1

杨晓军, 祝佳雄. 涡轮叶栅通道内颗粒物沉积过程的数值模拟[J]. 航空学报, 2017, 38(5): 120530-120530.

YANG Xiaojun, ZHU Jiaxiong. Numerical simulation of particle deposition process inside turbine cascade[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017, 38(5): 120530-120530.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

涡轮叶栅通道内颗粒物沉积过程的数值模拟

Numerical simulation of particle deposition process inside turbine cascade

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