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Sound & Vibration 2018年第4期52卷 9-20页

作者： Qian Kong genshan jiang Yuechao Liu North China Electric Power University Baoding071003China State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of SciencesBeijing100190China

The temperature field distribution directly reflects the combustion condition in a *** this paper,acoustic thermometry to reconstruct temperature distribution is investigated.A method based on radial basis function approximation with polynomial reproduction(RBF-PR)is proposed in order to improve the accuracy and stability of the method based on RBF *** addition,the refraction effect of sound wave paths is considered in the process of *** curved lines with refraction effect are numerically calculated by solving differential equations,which show that sonic waves curve towards the zones of higher *** reconstructed performance is validated via numerical simulation using four temperature distribution *** and analysis show that the proposed method has much greater accuracy than the method based on RBF approximation,and when considering the effect of refraction,our method can reconstruct more excellent reconstruction performance than others,which do not take into account the refraction effect of sound wave paths.

关键词： Acoustic thermometry RBF,RBF with polynomial reproduction refraction effect sound wave paths

Abatement of SO_2–NOx binary gas mixtures using a ferruginous active absorbent:Part I. Synergistic effects and mechanism

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Journal of Environmental Sciences 2015年第4期27卷 55-64页

作者： Yinghui Han Xiaolei Li Maohong Fan Armistead G.Russell Yi Zhao Chunmei Cao Ning Zhang genshan jiang School of Mathematics and Physics North China Electric Power University School of Energy Resources and Department of Chemical & Petroleum Engineering University of Wyoming School of Civil and Environmental Engineering Georgia Institute of Technology Shanxi Electric Power Exploration & Design Institute China's State Energy Group Co.

A novel ferruginous active absorbent, prepared by fly ash, industrial lime and the additive Fe（VI）, was introduced for synchronous abatement of binary mixtures of SO2–NOx from simulated coal-fired flue gas. The synergistic action of various factors on the absorption of SO2 and NOx was investigated. The results show that a strong synergistic effect exists between Fe（VI） dose and reaction temperature for the desulfurization. It was observed that in the denitration process, the synergy of Fe（VI） dose and Ca/（S ＋ N） had the most significant impact on the removal of NO, followed by the synergy of Fe（VI） and reaction temperature, and then the synergy of reaction temperature and flue gas humidity. A scanning electron microscope（SEM） and an accessory X-ray energy spectrometer（EDS）were used to observe the surface characteristics of the raw and spent absorbent as well as fly ash. A reaction mechanism was proposed based on chemical analysis of sulfur and nitrogen species concentrations in the spent absorbent. The Gibbs free energy, equilibrium constants and partial pressures of the SO2–NOx binary system were determined by thermodynamics.

关键词： Fe(VI) Desulfurization Denitration Binary gas Synergized effect Thermodynamics

Motion characteristics of particles around the cylindrical tube in a standing wave sound field

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Chinese Journal of Acoustics 2023年第2期42卷 204-219页

作者： LIU Yuechao jiang genshan YANG Yanfeng KONG Qian Department of Mathematics and Physics North China Electric Power UniversityBaoding 071003 Hebei Key Laboratory of Physics and Energy Technology North China Electric Power UniversityBaoding 071003 School of Mathematics and Physics North China Electric Power UniversityBeijing 102206 School of Energy Power and Mechanical Engineering North China Electric Power UniversityBeijing 102206

A calculation method combining the acoustic radiation force around the cylinder and the acoustic streaming Stokes force is proposed to calculate the motion of fluid and granular media outside a cylindrical *** the acoustic streaming equation outside the cylinder,the external vortex is obtained as the main body of flow when Rem≥325.27,where Rem is the dimensionless parameter that depends on the structure of the *** this basis,the limit slip velocity of the acoustic streaming outside the tube is calculated by using Nyborg’s boundary slip velocity theory,and the acoustic radiation force formula near the *** expression of particle critical diameter is derived when the particle velocity is zero and the acoustic radiation force and the acoustic streaming Stokes force are in *** movement of particles outside the cylinder at different positions is simulated,and the results are consistent with the theoretical formula:the particles’critical diameter is related to the acoustic *** the particle diameter is less than the critical diameter,the Stokes force of the acoustic streaming is dominant,and the particles move with the acoustic *** the particle diameter is greater than or equal to the critical diameter,the acoustic radiation force is dominant,and the particles gradually congregate at the node of the acoustic radiation force under the action of the acoustic radiation *** and simulation results show that the proposed method can be used to examine the distribution of particles outside the tube,and the results are helpful to solve the problems of tube scaling and reduction of the heat exchange rate of heat exchangers and steam generators in power stations.

关键词： outside cylinder cylindrical

Numerical simulation of acoustic streaming distribution outside spherical particles under the action of sound waves

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Chinese Journal of Acoustics 2021年第3期40卷 401-418页

作者： YANG Yanfeng jiang genshan jiang Yu LIU Yuechao YU Miao School of Energy Power and Mechanical Engineering North China Electric Power UniversityBeijing102206 School of Mathematics and Physics North China Electric Power UniversityBeijing102206

Considering the heat loss and viscosity loss inside the acoustic boundary layer,an acoustic streaming calculation model outside a two-dimensional spherical particle at the sound pressure node of a plane standing wave is established,and the numerical method of the separation time scale is used to simulate the characteristics of the acoustic streaming outside the *** reliability of the numerical simulation is verified by comparing the simulation results with the corresponding analytical solution and experimental ***,the effects of Reynolds number Re and Strouhal number Sr on the acoustic streaming structure,vortex intensity and range inside the acoustic boundary layer are *** results show that with increases in Sr and Re,the scale of the vortex structure inside the acoustic boundary layer decreases exponentially,which is inversely proportional to the particle diameter and the excitation frequency,and directly proportional to the kinematic viscosity of the fluid medium;additionally,the acoustic vibration system with low Sr and high Re can form a larger range and stronger acoustic *** numerical method can be used to evaluate the external acoustic streaming characteristics of any physical model.

关键词： outside spherical viscosity

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驻波场中圆柱形换热管外声流特性的数值研究

振动与冲击 2021年第6期40卷 41-48页

作者：杨延锋姜根山姜羽华北电力大学能源动力与机械工程学院北京102206 华北电力大学数理学院北京102206

基于非线性Navier-Stokes方程推导了一般性的声流控制方程,并利用有限元软件COMSOL对平面驻波声场中单根圆柱形换热管和双圆柱形换热管外包含二阶流场信息的Navier-Stokes方程进行全域求解,得到了一阶和二阶流场信息。研究了雷诺数Re和... 详细信息

基于非线性Navier-Stokes方程推导了一般性的声流控制方程,并利用有限元软件COMSOL对平面驻波声场中单根圆柱形换热管和双圆柱形换热管外包含二阶流场信息的Navier-Stokes方程进行全域求解,得到了一阶和二阶流场信息。研究了雷诺数Re和斯特劳哈尔数Sr对换热管外声流结构的影响规律。研究发现:随Re和Sr的增大,换热管边界层内的涡流区域变小,直至消失,而边界层外的涡流区域逐渐增大;且单换热管外涡流个数由8个减少到4个,双换热管外涡流个数从12个减少到8个。此外,边界层内和边界层外的涡流结构呈反向旋转;边界层外流场沿着振荡方向远离换热管,而在垂直方向流向换热管。

关键词：声流 Navier-Stokes方程驻波换热管边界层

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中低频声波强化对流换热试验研究

中南大学学报（自然科学版） 2022年第7期53卷 2407-2415页

作者：杨延锋姜根山李颢华北电力大学能源动力与机械工程学院北京102206 华北电力大学数理学院北京102206

为研究中低频声波作用下热铜球的对流换热特性,搭建声波强化传热实验台架,研究在声频率f为200~500 Hz、声压级Lp为133 dB的声波作用下不同直径(直径d为10,15和20 mm)热铜球的对流换热问题。研究结果表明:当声频率f为200~500 Hz时,随着... 详细信息

为研究中低频声波作用下热铜球的对流换热特性,搭建声波强化传热实验台架,研究在声频率f为200~500 Hz、声压级Lp为133 dB的声波作用下不同直径(直径d为10,15和20 mm)热铜球的对流换热问题。研究结果表明:当声频率f为200~500 Hz时,随着声频率增大,不同直径加热铜球的对流换热系数h都呈先减小后增加的变化规律。当f=200 Hz时,相对于自然对流换热,铜球的传热效果分别提升77%(d=10 mm),60%(d=15 mm)和50%(d=20 mm)。存在某一特定声频率f_(p)使铜球的对流换热系数h出现最小值。直径为15 mm和20 mm的热铜球在特定频率f_(p)的声波作用下出现传热恶化现象。传热恶化现象的发生与声波参数和铜球的结构参数相关。

关键词：中低频声波对流换热传热恶化

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声波作用下球形颗粒外声流分布的数值模拟

声学学报 2021年第4期46卷 584-593页

作者：杨延锋姜根山姜羽刘月超华北电力大学能源动力与机械工程学院北京102206 华北电力大学数理学院北京102206 华北电力大学(保定)数理系保定071003

综合考虑声学边界层内的热损失和黏性损失,建立处于平面驻波声压波节位置二维球形颗粒外声流计算模型,利用分离时间尺度的数值方法对颗粒外声流流场特征进行模拟。将模拟结果与相应的解析解和实验结果对比,验证了数值模拟的可靠性。在... 详细信息

综合考虑声学边界层内的热损失和黏性损失,建立处于平面驻波声压波节位置二维球形颗粒外声流计算模型,利用分离时间尺度的数值方法对颗粒外声流流场特征进行模拟。将模拟结果与相应的解析解和实验结果对比,验证了数值模拟的可靠性。在此基础上,研究了雷诺数Re和斯特劳哈尔数Sr对球形颗粒声学边界层内二阶声流流场结构、涡流强度及范围的影响规律.结果表明,随Sr和Re增大,声学边界层内的涡流结构尺度呈指数形式减小,其涡流尺度与颗粒直径D和激励频率f成反比,与流体介质运动黏度V成正比;且满足低Sr和高Re的声振系统可形成范围较大、更强烈的声流运动.该数值方法可用于对任意物理模型外声流特性的评估.

关键词：斯特劳哈尔数球形颗粒声波作用指数形式运动黏度物理模型颗粒直径流体介质

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声学法炉内温度场与速度场协同测量方法研究

仪器仪表学报 2023年第4期44卷 249-258页

作者：孔倩姜根山刘月超李鹏华北电力大学数理系保定071003 华北电力大学河北省物理学与能源技术重点实验室保定071003 华北电力大学数理学院北京102206

实时监测炉内燃烧温度场和烟气速度场是保证锅炉安全、经济运行的重要手段,声学法测物理场被认为是一种非侵入性和有效的测量方法。本文提出了一种基于声波法的炉内温度场和烟气速度场的协同测量新方法,建立了基于径向基函数的多物理场... 详细信息

实时监测炉内燃烧温度场和烟气速度场是保证锅炉安全、经济运行的重要手段,声学法测物理场被认为是一种非侵入性和有效的测量方法。本文提出了一种基于声波法的炉内温度场和烟气速度场的协同测量新方法,建立了基于径向基函数的多物理场重建模型,采用Tikhonov正则化算法求解不适定问题,同时考虑了声波的折射效应对物理场的重建影响。采用典型的炉内物理场模型进行了数值模拟,模拟结果表明,本文方法能够很好的协同重建温度场和速度场。当考虑声线弯曲时能够显著提高各物理场的重建质量。算法具有较好的适应性和良好的抗噪性能,重建精度较高,标准均方根误差在10%以下。模拟实验平均计算时间为31.4 s,可保证炉内声学测量的实时性。声学法协同测量多物理场可为优化炉膛燃烧过程提供依据。

关键词：声波测温声波测速协同测量重建算法径向基函数

基于FW-H方程的Hartmann哨辐射声场数值研究

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应用声学 2018年第1期37卷 180-186页

作者：付豪姜根山华北电力大学数理系保定071003

该文基于声类比法,通过求解FW-H方程,对不同喷口与谐振腔位置关系的Hartmann哨的声场分布进行了分析,计算了不同位置关系的Hartmann哨的声指向性。得到了以下结论:喷口与谐振腔位置关系对Hartmann哨的发声基频几乎不产生影响。对称位置... 详细信息

该文基于声类比法,通过求解FW-H方程,对不同喷口与谐振腔位置关系的Hartmann哨的声场分布进行了分析,计算了不同位置关系的Hartmann哨的声指向性。得到了以下结论:喷口与谐振腔位置关系对Hartmann哨的发声基频几乎不产生影响。对称位置关系的Hartmann哨的声场呈对称趋势,且在垂直于喷流方向上达到最大;非对称位置关系的Hartmann哨不再呈现对称趋势。Hartmann哨的最大声压级随着偏离对称位置的距离的增加有小幅增加,最大声压级出现的方向向着谐振腔方向移动。

关键词： Hartmann哨声类比法声指向性

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强声波作用下煤粉颗粒的振荡特性研究

动力工程学报 2021年第4期41卷 263-271页

作者：杨延锋姜根山于淼华北电力大学能源动力与机械工程学院北京102206 华北电力大学数理学院北京102206

考虑Stokes力为颗粒的主要受力,建立了强声波作用下煤粉颗粒的动力学控制方程,并给出了颗粒的夹带系数计算公式。采用数值计算方法研究了颗粒位置、烟气温度、颗粒密度、颗粒粒径、声波频率和声压级等参数对煤粉颗粒在冲击波形成之前运... 详细信息

考虑Stokes力为颗粒的主要受力,建立了强声波作用下煤粉颗粒的动力学控制方程,并给出了颗粒的夹带系数计算公式。采用数值计算方法研究了颗粒位置、烟气温度、颗粒密度、颗粒粒径、声波频率和声压级等参数对煤粉颗粒在冲击波形成之前运动特征和夹带系数的影响。结果表明:强声波场中距声源不同位置处的颗粒具有不同的振荡周期和速度振幅,呈现出丰富的振荡特征;在声源附近,颗粒主要受基波的影响,表现为类正弦振荡,而在远离声源位置靠近冲击波位置时,颗粒主要受到基波和二次谐波、三次谐波等高次谐波的协同控制,表现为不规则振荡行为;夹带系数与颗粒位置、颗粒质量和声波频率等参数呈负相关,而与烟气温度呈正相关。

关键词：强声波煤粉颗粒振荡特性夹带系数