英國帝國理工機械工程係教授Mehdi Vahdati講授“葉輪機氣動、氣動聲學和氣彈”全英文課程-永利开户网站注册
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英國帝國理工機械工程係教授Mehdi Vahdati講授“葉輪機氣動、氣動聲學和氣彈”全英文課程
發布時間:2020年10月23日 16:40 作者: 點擊量:

英國帝國理工機械工程係教授Mehdi Vahdati應動力與能源學院邀請來我校從事研究生全英文課程建設工程,計劃於近期講授葉輪機氣動、氣動聲學和氣彈全英文課程,歡迎廣大研究生和高年級本科生報名選修(旁聽)學習。

聯 係 人:動力與能源學院  王丁喜 教授

聯係方式:18966905505 dingxi_wang@nwpu.eurosedans.com

課程名稱:Turbomachinery aerodynamics, aeroacoustics and aeroelasticity

時間地點:見附件

課程介紹:主要授課內容包括如下7個章節,各章節主要內容和教學目標如下:

1)葉輪機基礎(4學時)

主要內容:

(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

教學目標: Understand fundamentals of turbomachinery

2)氣體動力學基礎(針對氣動彈性力學)(4學時)

主要內容:

(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)

教學目標:Understand steady and unsteady aerodynamic concepts that are needed for turbomachinery aeroelasticity analysis

3)結構動力學基礎(針對氣動彈性力學)(4學時)

主要內容:

(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)

教學目標:Understand basic vibration theory that are needed for turbomachinery aeroelasticity analysis

4)氣動聲學簡介(6學時)

主要內容:

(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)

教學目標:Understand fundamental concepts and theories of aeroacoustics: aerodynamic noise sources and sound propagation, transmission and reflection in turbomachinery

5)壓氣機定常和非定常氣動彈性力學(4學時)

主要內容:

(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

教學目標:Understand static and dynamic aeroelastic concepts and their impact on turbomachinery design

6)強迫振動:概念,機理,分類和案例(8學時)

主要內容:

(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


教學目標:Understand the mechanism and behaviour of different types of forced response and their modelling strategies

7) 顫振:概念,機理,分類和案例(10學時)

主要內容:

(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


教學目標:Understand the mechanism and behaviour of different types of flutter and their modelling strategies


外教簡介:

Mehdi Vahdati教授是世界一流大學帝國理工機械工程係教授,具有三十多年的葉輪機氣動和氣動彈性力學從業經驗。2001年他榮獲世界上第二大航空發動機公司羅羅公司授予的研究員頭銜。Mehdi Vahdati教授發表期刊學術論文70餘篇,行業內6本書籍的章節撰稿人,是葉輪機領域頂級期刊的副主編。Mehdi Vahdati教授也是眾多葉輪機械製造商(比如羅羅公司、British AerospaceParsons steam Turbines, McLaren InternationalMHI)的技術顧問。