多参数耦合几何不确定性对涡轮气膜冷却的影响机理研究

批准号:
52006117
项目类别:
青年科学基金项目
资助金额:
24.0 万元
负责人:
周凯
依托单位:
学科分类:
内流流体力学
结题年份:
2023
批准年份:
2020
项目状态:
已结题
项目参与者:
周凯
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中文摘要
几何不确定性导致涡轮叶片气膜冷气与主流掺混的气动和传热预测出现偏差,涡轮冷却温度分散度大,严重制约了涡轮的性能和寿命。在实际涡轮不确定性研究中,影响几何不确定性的参数众多,高维参数会带来计算量的“维度灾难”,工程实现上遇到了很大的挑战。本项目根据课题组自有的几何参数,结合与空军某大修厂合作实际测绘的涡轮几何偏差数据,通过改进多种不同类型输入变量数据处理上的局限性和稀疏数据条件下应用的局限性,发展一种先进的基于矩的任意多项式混沌的稀疏近似方法,以克服“维度灾难”问题;基于所发展的方法,开展不同几何特征对涡轮气膜冷却的气动热性能的敏感度定量研究;选取典型几何特征分布,通过数值模拟和冷效试验方法,揭示气膜射流对叶中流动掺混和端壁附近三维涡系演化的影响机理,以及和流动相耦合的传热特性分布。本项目研究成果不仅可以提供工程可用的几何不确定量化分析方法,也可为涡轮鲁棒性气动热设计奠定基础。
英文摘要
Geometric uncertainty leads to the prediction deviation of aero-thermal performance due to turbine film cooling mixing between the coolant and the mainstream, which results in a large dispersion of the turbine temperature, reducing the performance and service life. In real turbine uncertainty quantification (UQ) research, there are many parameters involved in geometric uncertainty, which faces a serious “curse of dimensionality”. Therefore, it is a great challenge to adopt an UQ method in real engineering application. In this project, based on the obtained data in the research group, a deep cooperation with maintenace factory is developed to measure the geometric uncertainty distribution in real turbines. To overcome the limitations of traditional methods in dealing with different input types and scarce data information, a novel UQ method named SAMBA PC (Sparse Approximation of Moment-Based Arbitrary Polynomial Chaos) is further developed and analyzed, which is expected to solve “curse of dimensionality” problem; Based on the novel method, the sensitivity index of UQ on the aero-thermal performance is quantitatively investigated; By adopting several sets of typical geometric parameters, high-fidelity numerical methods and a transonic turbine cascade facility test with cooling effect will be conducted to explore the coolant -mainstream mixing near the middle span and complex three-dimensional flow evolution, as well as the corresponding heat transfer features. This project not only can provide a novel UQ method for engineering application, but also can establish the foundation for future turbine robust aero-thermal design.
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DOI:https://doi.org/10.1016/j.energy.2022.124192
发表时间:2022
期刊:Energy
影响因子:9
作者:Kai Zhou;Xinqian Zheng
通讯作者:Xinqian Zheng
柴达木盆地环境演化对早Toarcian期碳循环扰动的反馈机制研究
- 批准号:42302191
- 项目类别:青年科学基金项目
- 资助金额:20万元
- 批准年份:2023
- 负责人:周凯
- 依托单位:
超导驱动、信息制导的新型机床构造原理与实现技术研究
- 批准号:51275257
- 项目类别:面上项目
- 资助金额:80.0万元
- 批准年份:2012
- 负责人:周凯
- 依托单位:
飞行器大型薄壁件柔性定位/夹紧系统优化设计的动态自生成研究
- 批准号:50775126
- 项目类别:面上项目
- 资助金额:34.0万元
- 批准年份:2007
- 负责人:周凯
- 依托单位:
制造业信息化中制造信息差原理及其应用研究
- 批准号:50375081
- 项目类别:面上项目
- 资助金额:18.0万元
- 批准年份:2003
- 负责人:周凯
- 依托单位:
敏捷制造中智能寻位加工技术的研究
- 批准号:59785005
- 项目类别:专项基金项目
- 资助金额:11.0万元
- 批准年份:1997
- 负责人:周凯
- 依托单位:
国内基金
海外基金
