Characterizing the dynamics of transition on turbofan blades

表征涡轮风扇叶片过渡动力学

• 批准号: 523776-2018
• 负责人: Rival, David
• 金额: $ 17.48万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=697769
• 关键词: Characterizing; dynamics; transition; turbofan; blades

Pratt and Whitney Canada (P&WC) is a leading manufacturer of turbofan engines used in business jets. The high efficiency of these engines relies on the use of high-bypass ratio fan blades, for which the blades require the airfoil profile to be slender. Often during operation, the flow over these fan blades leads to the formation of a laminar separation bubble (LSB), and the boundary layer flow becomes transitional. At high altitudes and at low Reynolds numbers (Re), movement of the transition point may create unsteady loadings, which can potentially lead to severe vibration of the blade, known as flutter. The goal of this research program is to investigate how the formation of the LSB and its movement can contribute to flutter. The flow over a generic airfoil profile will be examined as a baseline case, using both state-of-the-art experimental and numerical tools. The eventual goal is to develop a properly calibrated transition model appropriate for use with industrial simulations that can predict the onset and behaviour of flutter over a range of operating conditions. The proposed program will primarily support training of highly-qualified personnel (HQP) including two undergraduate researchers (per year), four PhD students (per year) as well as two postdoctoral fellows (per year). The HQP will have an opportunity to either work closely with the P&WC or even conduct part of their research while at their R&D facilities in Mississauga.

普惠加拿大公司（P&WC）是一家领先的商用喷气式飞机涡轮风扇发动机制造商。这些发动机的高效率依赖于高涵道比风扇叶片的使用，对于高涵道比风扇叶片，叶片要求翼型轮廓是细长的。通常在操作期间，这些风扇叶片上的流动导致层流分离泡（LSB）的形成，并且边界层流变得过渡。在高海拔和低雷诺数（Re）下，过渡点的运动可能会产生不稳定载荷，这可能会导致叶片的严重振动，称为颤振。本研究计划的目标是调查LSB的形成及其运动如何有助于颤振。一般翼型上的流动将作为基线情况进行检查，使用最先进的实验和数值工具。最终的目标是开发一个适当校准的过渡模型，适用于工业模拟，可以预测在一系列操作条件下的颤振的发生和行为。拟议的计划将主要支持高素质人才（HQP）的培训，包括两名本科研究人员（每年），四名博士生（每年）以及两名博士后研究员（每年）。HQP将有机会与P&WC密切合作，甚至在其位于密西索加的研发设施进行部分研究。