Numerical investigation of the influence of the tip clearance flow and the Coriolis force on the near wal flow in a compressor stage
压气机级叶顶间隙流和科里奥利力对近鲸流影响的数值研究
基本信息
- 批准号:365409499
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2017
- 资助国家:德国
- 起止时间:2016-12-31 至 2021-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Current efforts in turbomachinery to increase pressure ratio, reduce blade count, decrease the aspect ratio, intense part load operation, etc. lead to increasing influence of flows near the side walls on the overall engine performance. Especially the operating range, losses and heat transfer are influenced by these flows. The occurring mechanisms are not fully understood although being investigated since decades. Thus the current technological progress strongly requests adequate basic research activity. This deficit will be addressed by a joint research program of four research groups at TU Dresden, UniBw München und RU Bochum, by carefully coordinated simulations and experiments to produce relevant results. Beside the investigation of heat transfer and the development of methodical tools a major goal of this joint program is the detailed analysis of the effect of system rotation. Therefor a number of specially planed and adjusted configurations will be investigated and compared with each other.Within this consortium the purpose of the project at the Chair of Fluid Mechanics, TU Dresden, is twofold. One is to investigate the physics of the secondary flow near the side walls and to contrast it with the situation in a linear cascade. The other is to contribute to a reliable turbulence-resolving simulation technology for turbomachinery grids. The physical issues will be investigated with DNS and LES for configurations experimentally investigated in partner projects, thus insuring reliable validation. These involved and well controlled simulations can yield very rich data and, for example, provide information about transition processes. Simulating configurations with and without rotation will allow studying the dependence of the near-wall flow on inflow conditions and effects generated by the system rotation, such as Coriolis force, increasing pitch with blade height, radial pressure gradients, relative motion of the end walls and shear of the inlet boundary layer. The methodologically oriented part of the work are concerned with visualization and post-processing and predominantly with assessment and development of subgrid-scale models and wall models for LES. Indeed, there exists a large demand for improved models of this type well applicable to turbomachinery flows. The analysis of the simulation data obtained will be conducted with the project partners comparing results of different methods for the same configuration - like experiment, URANS, LES - or results for different configurations among which comparisons between compressor and turbine flow thus covering a very wide parameter range.
目前在涡轮增压器中增加压力比、减少叶片数、减小展弦比、强部分负荷操作等的努力导致侧壁附近的流动对整个发动机性能的影响越来越大。特别是工作范围,损失和传热受到这些流量的影响。虽然几十年来一直在研究,但其发生机制尚未完全了解。因此,当前的技术进步强烈要求开展充分的基础研究活动。这一缺陷将由德累斯顿工业大学、慕尼黑大学和波鸿大学的四个研究小组联合研究,通过精心协调的模拟和实验产生相关结果。除了研究传热和开发方法工具之外,该联合计划的一个主要目标是详细分析系统旋转的影响。因此,一些特别规划和调整的配置将进行调查和相互比较。在这个财团的流体力学主席,德累斯顿工业大学,该项目的目的是双重的。一个是研究侧壁附近二次流的物理特性,并将其与线性叶栅中的情况进行对比。二是为建立一种可靠的非线性网格解析仿真技术做出贡献。将使用DNS和LES对合作伙伴项目中实验研究的配置的物理问题进行调查,从而确保可靠的验证。这些复杂且控制良好的模拟可以产生非常丰富的数据,例如,提供有关过渡过程的信息。模拟有旋转和无旋转的配置将允许研究近壁流对流入条件的依赖性和系统旋转产生的影响,例如科里奥利力、随叶片高度增加的桨距、径向压力梯度、端壁的相对运动和入口边界层的剪切。面向方法的部分工作涉及可视化和后处理,主要是与评估和开发的亚网格尺度模型和壁模型LES。事实上,存在着大量的需求,这种类型的改进模型很好地适用于非线性流动。将与项目合作伙伴一起对获得的模拟数据进行分析,比较相同配置的不同方法的结果(如实验、URANS、LES)或不同配置的结果,其中比较压气机和涡轮机流量,因此涵盖了非常广泛的参数范围。
项目成果
期刊论文数量(0)
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科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Professor Dr.-Ing. Jochen Fröhlich其他文献
Professor Dr.-Ing. Jochen Fröhlich的其他文献
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{{ truncateString('Professor Dr.-Ing. Jochen Fröhlich', 18)}}的其他基金
Experiments and simulations for the study of submerged aquatic canopies consisting of long flexible blades
由长柔性叶片组成的水下水生冠层研究的实验和模拟
- 批准号:
316798177 - 财政年份:2016
- 资助金额:
-- - 项目类别:
Research Grants
Entwicklung numerischer Modelle zur Vorhersage kavitationsbedingter Geräusche und Erosion in Hydraulikventilen mittels LES
使用 LES 开发数值模型来预测液压阀中与气蚀相关的噪声和腐蚀
- 批准号:
175375325 - 财政年份:2010
- 资助金额:
-- - 项目类别:
Research Grants
LES and DNS of the unsteady interaction of secondary flows in turbomachnine grids
涡轮机网格中二次流非定常相互作用的LES和DNS
- 批准号:
165216121 - 财政年份:2010
- 资助金额:
-- - 项目类别:
Research Grants
High resolution numerical and experimental studies of turbulence-induced sediment erosion and near-bed transport
湍流引起的沉积物侵蚀和近床输送的高分辨率数值和实验研究
- 批准号:
125500987 - 财政年份:2009
- 资助金额:
-- - 项目类别:
Research Grants
Large Eddy Simulation mit adaptiven bewegten Gittern zur Lösung meteorologischer Fragestellungen
使用自适应移动网格的大涡模拟解决气象问题
- 批准号:
42390337 - 财政年份:2007
- 资助金额:
-- - 项目类别:
Priority Programmes
LES-RANS coupling for the simulation of complex flows
用于模拟复杂流动的 LES-RANS 耦合
- 批准号:
5405882 - 财政年份:2003
- 资助金额:
-- - 项目类别:
Research Units
Experimental and scale resolving numerical investigations of the physical performance of circumferential grooves in subsonic axial compressor stages
亚音速轴流压气机级圆周槽物理性能的实验和规模解析数值研究
- 批准号:
500054096 - 财政年份:
- 资助金额:
-- - 项目类别:
Research Grants
Near-Wall Flow in Turbomachinery Blade Rows
涡轮机械叶片排中的近壁流
- 批准号:
461733375 - 财政年份:
- 资助金额:
-- - 项目类别:
Research Grants
Rotor cooling of low-inertia induction machines for highly dynamic applications
适用于高动态应用的低惯量感应电机的转子冷却
- 批准号:
507287551 - 财政年份:
- 资助金额:
-- - 项目类别:
Research Grants
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