气动声学基础及其在航空推进系统中的应用(英文版)

气动声学既是一门流体 与声学交叉的基础技术学 科，又是一门紧密结合航 空飞行器及其推进系统研 发设计的应用学科，有着 显著的工程应用背景。因 此，如何将复杂的飞行动 力系统中声音的产生、传 播和辐射凝练成基础科学 问题，并从中获得物理机 制的理解和认识，是本书 主要的写作目的。本书按 照气动声学作为基础学科 的发展过程为背景，结合 航空推进器关键气动声学 问题，构建了从基础研究 到工程应用快速预测方法 的知识体系，其中包括气 动声学的基本定律、快速 计算模型、不同类型的流 体与物面边界干涉等发声 问题的物理建模、并结合 发动机主要噪声部件阐明 了声音的来源和传播特性 。 本书可以作为气动声学 课程讲义，也可以作为具 有基础流体力学和声学基 础知识的研究生自学材料 ，更可以成为参与型号研 制的航空工程师学习调研 的重要参考资料。

CHAPTER 1 Basic equations of aeroacoustics 1.1 Sound sources in moving media 1.1.1 Basic equations o f sound propagation 1.1.2 Energy relations in moving media 1.1.3 Sound field ofmoving sound sources 1.1.4 Frequency features of moving sound sourcc Dopplcr effect 1.2 Generalized Green’s formula 1.3 Lighthill equation 1.3.1 Derivation of basic equations 1.3.2 Effect of solid boundary on sound generation 1.4 Ffowcs Williams.Hawkings equation 1.5 Generalized Lighthill’s equation References CHAPTER 2 Propeller noise：Prediction and control 2.1 Noise sources of propeller 2.1.1 An overvicw，the developing history of propeller noise prediction 2.1.2 Advanced propeller noise(Propfan noisc) 2.2 Propeller noise prediction in frequency—domain 2.2.1 The basic equations 2.2.2 Aerodynamic performance prediction 2.2.3 The near-field solution of propeller noise 2.2.4 The far-field solution of propeller noise 2.3 Propeller noise prediction in time—domain 2.3.1 The basic equations 2.3.2 The solution o f the free-space generalized wave equation 2.3.3 The fundamental integral formulas o f the sur face source in time-domain 2.3.4 The integral expressions of the sound field due to monopoles and dipoles 2.3.5 Introduction to numerical computation methods References CHAPTER 3 Noise prediction in aeroengine 3.1 Noise sources in aeroengine 3.2 Tone noise by rotor／stator interaction in fan compressor 3.2.1 Introduction 3.2.2 Model of sound generation by unstcady aerodynamic load on blade 3.2.3 Prediction for tone noise by rotor／stator interaction 3.3 Shockwave noise in fan／compressor 3.3.1 Physical mechanism of shockwave noise in fan compressor 3.3.2 Shockwave noise prediction method 3.3.3 Power computation of shockwave noise 3.4 Combustion noise 3.5 Jet noise 3.5.1 Solution of Lighthill’S equation 3.5.2 Prediction ofjet noise 3.5.3 Effect of non-uniform flow Lilley’s equation References CHAPTER 4 Linearized unsteady aerodynamics for aeroacoustic applications 4.1 IntrOductiOn 4.2 Basic linearized unsteady aerodynamic equations 4.2.1 Velocity decomposing theorem for uniform flows 4.2.2 Disturbance velocity decomposition in non-uni form flow fields：Goldstein’S equation 4.3 Unsteady loading for two—dimensional supersonic cascades with subsonic leading—edge locus 4.3.1 Physical and mathematical models 4.3.2 Discussion concerning the convergence of thc kernel function 4.3.3 Reflection coefficients of Mach waves and the solution of the integral equation 4.3.4 Comparison o f numerical solutions for unsteady blade loading 4.4 Lifting surface theory for unsteady analysis of fan／compressor cascade 4.4.1 A unifled framework for acoustic field and unsteady flow 4.4.2 Integral equation for the solution of unsteady blade load 4.4.3 Upwash velocity for three di fferent incoming conditions 4.4.4 Solution to the integral equation 4.4.5 Numerical validation of unsteady blade loading References CHAPTER 5 Vortex sound theory 5.1 Introduction tO sound generation induced by vortex flow 5.2 Basic equations of vortex sound 5.2.1 Powell’S equation 5.2.2 Howe’S acoustic analogy 5.2.3 The equivalence of Curie’s equation and Howe’s equation 5.3 Vortex sound model of trailing edge noise 5.4 Vortex sound model of liner impedance 5.5 Effect of grazing flow on vortex-sound interaction of perforated plates 5.5.1 Effect of grazing flow on the acoustic impedance of perforated plates 5.5.2 Effect of plate thickness on impedance of perforated plates with bias flow 5.6 Nonlinear model of vortex.sound interaction 5.6.1 The nonlinear model of vo