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【海外名师】短期授课项目---Turbomachinery aerodynamics, aeroacoustics and aeroelasticity
2020-10-23 16:15   审核人:   (点击: )

英国帝国理工机械工程系教授Mehdi Vahdati应动力与能源学院邀请来我校从事研究生全英文课程建设工程,计划于近期讲授“叶轮机气动、气动声学和气弹”全英文课程,欢迎广大研究生和高年级本科生报名选修(旁听)学习。

联系人:动力与能源学院 王丁喜教授

联系方式:18966905505dingxi_wang@nwpu.edu.cn

课程名称:Turbomachinery aerodynamics, aeroacoustics and aeroelasticity

时间地点:见附件

课程介绍:主要授课内容包括如下7个章节,各章节主要内容和教学目标如下:

1)叶轮机基础(4学时)

主要内容:

(1)Background of turbomachinery

(2)Principles of turbomachinery

(3)Main components in a gas turbine

(4)Layout of a gas turbine

(5)Evolution of jet engine design

(6)Off-design operation of gas turbines

(7)Aerodynamic and aeromechanical instabilities in a gas turbine

(8)Common terminologies for turbomachinery

教学目标:Understand fundamentals of turbomachinery

2)气体动力学基础(针对气动弹性力学)(4学时)

主要内容:

(1)Aerofoil aerodynamics and flow separation

(2)Axial compressor description and design parameters

(3)Component characteristics

(4)Stages and loading considerations

(5)Three-dimensional effects, shock and tip leakage jets

(6)Blade stall

(7)Wakes and potential

(8)Distortion in flow field

(9)Experimental aerodynamics

(10)Introduction to computational fluid dynamics (CFD)

教学目标:Understand steady and unsteady aerodynamic concepts that are needed for turbomachinery aeroelasticity analysis

3)结构动力学基础(针对气动弹性力学)(4学时)

主要内容:

(1)Single and multi-degree of freedom mechanical systems

(2)Analytical solution of ODEs and PDEs

(3)Free and forced vibrations

(4)Transformation to modal coordinates

(5)Damping

(6)Frequency response function (FRF)

(7)Introduction to finite element analysis (FEA)

教学目标:Understand basic vibration theory that are needed for turbomachinery aeroelasticity analysis

4)气动声学简介(6学时)

主要内容:

(1)Vibration, resonance and sound

(2)Tonal and broadband sounds

(3)Linearised Euler equations and the convected wave equation

(4)Linear waves: acoustic, vortical and entropy waves

(5)Duct acoustics: sound field in ducts and properties of duct modes

(6)Sound propagation in ducts: wavenumber and cut-off condition

(7)Sound transmission and reflection in bladed structures

(8)Sound reflection and radiation at intake

(9)Turbomachinery noise: rotor-alone tones, interaction tones, buzz-saw noise

(10)Acoustic impedance: Helmholtz resonator and acoustic liner

(11)Introduction to experimental aeroacoustics

(12)Introduction to computational aeroacoustics (CAA)

教学目标:Understand fundamental concepts and theories of aeroacoustics: aerodynamic noise sources and sound propagation, transmission and reflection in turbomachinery

5)压气机定常和非定常气动弹性力学(4学时)

主要内容:

(1)Static aeroelasticity – blade untwist, divergence

(2)Dynamic aeroelasticity - blade and disc vibration, shaft vibration

(3)Mode shape and natural frequency

(4)Nodal diameter and nodal circle

(5)Campbell diagram

(6)Damping: aero-damping and mechanical damping

(7)Bladed-disk and blade-integrated-disk (blisk)

(8)Linear and nonlinear aeroelastic phenomena

(9)Mistuning

(10)Stress, strain and fatigue

(11)Experimental aeroelasticity: testing and measurements

(12)Introduction to computational aeroelasticity methods

教学目标:Understand static and dynamic aeroelastic concepts and their impact on turbomachinery design

6)强迫振动:概念,机理,分类和案例(8学时)

主要内容:

(1)Mechanism of forced response

(2)Blade forcing and damping

(3)Classification of forced response: single frequency excitation and broadband frequency excitation

(4)Rotor-stator interaction

(5)Fan forced response due to inlet distortion

(6)Rotor forced response due to pylon or mis-staggered stator vanes

(7)Turbine rotor forced response due to blocked burners in combustor

(8)Turbine forced response due to combustion oscillation

(9)Evaluation of rotor endurance

(10)Design considerations to mitigate forced response

教学目标:Understand the mechanism and behaviour of different types of forced response and their modelling strategies

7)颤振:概念,机理,分类和案例(10学时)

主要内容:

(1)Mechanism of flutter

(2)Damping: energy input and dissipation mechanisms

(3)Blade response – High Cycle Fatigue (HCF)

(4)Classification of flutter

(5)Parameters affecting flutter

(6)Classical flutter in wings

(7)Stall flutter in compressors

(8)Choke flutter in compressors

(9)High-speed shock driven flutter

(10)Acoustic-driven flutter of embedded rotors

(11)Fan-intake interaction flutter

(12)Design considerations to avoid flutter

教学目标:Understand the mechanism and behaviour of different types of flutter and their modelling strategies

外教简介:

Mehdi Vahdati教授是世界一流大学帝国理工机械工程系教授,具有三十多年的叶轮机气动和气动弹性力学从业经验。2001年他荣获世界上第二大航空发动机公司罗罗公司授予的研究员头衔。Mehdi Vahdati教授发表期刊学术论文70余篇,行业内6本书籍的章节撰稿人,是叶轮机领域顶级期刊的副主编。Mehdi Vahdati教授也是众多叶轮机械制造商(比如罗罗公司、British Aerospace、Parsons steam Turbines, McLaren International、MHI)的技术顾问。

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