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Review on Stress Corrosion and Corrosion Fatigue Failure of Centrifugal Compressor Impeller

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Chinese Journal of Mechanical Engineering 2015年第2期28卷 217-225页

作者： SUN Jiao chen songying QU Yanpeng LI Jianfeng School of Mechanical Engineering Shandong University Research Center for Sustainable Manufacturing Shandong University Key Laboratory of High efficiency and Clean Mechanical Manufacture Ministry of Education Shandong University

Corrosion failure,especially stress corrosion cracking and corrosion fatigue,is the main cause of centrifugal compressor impeller *** it is concealed and *** paper summarizes the main theories of stress corrosion cracking and corrosion fatigue and its latest developments,and it also points out that existing stress corrosion cracking theories can be reduced to the anodic dissolution（AD）,the hydrogen-induced cracking（HIC）,and the combined AD and HIC *** corrosion behavior and the mechanism of corrosion fatigue in the crack propagation stage are similar to stress corrosion *** effects of stress ratio,loading frequency,and corrosive medium on the corrosion fatigue crack propagation rate are analyzed and *** corrosion behavior and the mechanism of stress corrosion cracking and corrosion fatigue in corrosive environments,which contain sulfide,chlorides,and carbonate,are *** working environments of the centrifugal compressor impeller show the behavior and the mechanism of stress corrosion cracking and corrosion fatigue in different corrosive *** current research methods for centrifugal compressor impeller corrosion failure are *** analysis,numerical simulation,and the fluid-structure interaction method play an increasingly important role in the research on impeller deformation and stress distribution caused by the joint action of aerodynamic load and centrifugal load.

关键词： stress corrosion cracking corrosion fatigue stainless steel centrifugal compressor impeller

Effects of Temperature and Pressure on Stress Corrosion Cracking Behavior of 310S Stainless Steel in Chloride Solution

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Chinese Journal of Mechanical Engineering 2017年第1期30卷 200-206页

作者： ZHONG Yunpan ZHOU cheng chen songying WANG Ruiyan Key Laboratory of High-efficiency and Clean Mechanical Manufacture Shandong UniversityJinan 250061China Qingdao Boiler and Pressure Vessel Supervisory Institute Qingdao 266071China

310S is an austenitic stainless steel for high temperature applications, having strong resistance of oxidation, hydrogen embrittlement and corrosion. Stress corrosion cracking（SCC） is the main corrosion failure mode for 310S stainless steel. Past researched about SCC of 310S primarily focus on the corrosion mechanism and influence of temperature and corrosive media, but few studies concern the combined influence of temperature, pressure and chloride. on SCC of 310S stainless steel, prepared samples are investigated via For a better understanding of temperature and pressure＇s effects slow strain rate tensile test（SSRT） in different temperature and pressure in NACE A solution. The result shows that the SCC sensibility indexes of 310S stainless steel increase with the rise of temperature and reach maximum at 10MPa and 160~C, increasing by 22.3% compared with that at 10 MPa and 80 ℃. Instead, the sensibility decreases with the pressure up. Besides, the fractures begin to transform from the ductile fracture to the brittle fracture with the increase of temperature. 310S stainless steel has an obvious tendency of stress corrosion at 10MPa and 160℃ and the fracture surface exists cleavage steps, river patterns and some local secondary cracks, having obvious brittle fracture characteristics. The SCC cracks initiate from inclusions and tiny pits in the matrix and propagate into the matrix along the cross section gradually until rupture. In particular, the oxygen and chloride play an important role on the SCC of 310S stainless steel in NACE A solution. The chloride damages passivating film, causing pitting corrosion, concentrating in the cracks and accelerated SSC ultimately. The research reveals the combined influence of temperature, pressure and chloride on the SCC of 310S, which can be a guide to the application of 310S stainless steel in super-heater tube.

关键词： 310S stainless steel SSRT stress corrosion chloride temperature

Numerical Investigation on the Features of Gasoline Mixture Flow Field with Rotary Jet Mixing

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Journal of Beijing Institute of Technology 2018年第3期27卷 399-405页

作者： songying chen Longhao Xiang Yanpeng Qu Key Laboratory of High-Efficiency and Clean Mechanical Manufacture National Demonstration Center for Experimental Mechanical Engineering EducationSchool of Mechanical EngineeringShandong University

Employing the standard k-εturbulent model and slipping grid technique,distributions of velocity and dynamic pressure and mixing time was numerically investigated to research the gasoline flow features and mixing efficiency in a gasoline mixture tank with a rotary jet mixing(RJM)system installed at the bottom *** simulation results showed that the RJM system can achieve fully circular stir without blind corner,reaching high mixing efficiency in the mixing process of gasoline from different refining *** mixing density difference met the mixing requirement for the first time at 31.2 s and then showed a tendency of *** met the requirement again at 58.2 s with the mixing density difference meeting the mixing criterion of 3‰.

关键词： gasoline mixing rotary jet mixing(RJM) computational fluid dynamics(CFD)simulation mixing time

Numerical Investigation of Lid-Driven Deep Cavity with Local Grid Refinement of MRT-LBM

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Journal of Beijing Institute of Technology 2019年第3期28卷 536-548页

作者： Dongdong Wan Guichao Wang songying chen Key Laboratory of High-Efficiency and Clean Mechanical Manufacture School of Mechanical EngineeringShandong University

In the case of lid-driven deep cavity flow, the effects of different resolutions of local grid refinement have been studied in the frame of multiple relaxation times (MRT) lattice Boltzmann method (LBM). In all the cases, the aspect ratio and Reynolds number are set as 1.5 and 3.200, respectively. First, the applied method is validated by comparing it with two reported works, with which agreements are reached. Then, six separate degrees of local grid refinement at the upper left corner, i.e. purely coarse grid, including 1/64, 1/32, 1/16, 1/8, 1/4 refinements of the lattice number in the width direction have been studied in detail. The results give the following indications:① The refinement degrees lower than 1/8 produce similar results;② For single corner refinement, 1/4 refinement is adequate for clearing the noises in the singularity zone to a large extent;③ New noise around the interface between coarse and fine zones are introduced by local grid refinement. Finally, refinement of entire subzone neighboring the lid is examined to avoid introducing new noises and it has been found effective.

关键词： numerical investigation lid-driven deep cavity local grid refinement lattice Boltzmann method (LBM) multiple relaxation time (MRT)

Investigation of mini-hydrocyclone performance in removing small-size microplastics

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Particuology 2022年第12期71卷 1-10页

作者： Liqun He Li Ji Xun Sun songying chen Shibo Kuang Key Laboratory of High Efficiency and Clean Mechanical Manufacture Ministry of EducationSchool of Mechanical EngineeringShandong UniversityJinan 250061China National Demonstration Center for Experimental Mechanical Engineering Education Shandong UniversityJinan 250061China ARC Research Hub for Computational Particle Technology Department of Chemical EngineeringMonash UniversityClaytonVictoria 3800Australia

Large amounts of microplastics(MPs)have been found in rivers and oceans,bringing great harm to aquatic animals,plants,even human ***,the effective removal method of MPs,especially those with small sizes(5-20 μm)is still *** work presents mini-hydrocyclones to remove 10 μm(average size)diameter *** removal performance of nine mini-hydrocyclones with different diameters of spigot and vortex finder is examined experimentally and *** performance of the designed cyclones is evaluated in terms of recovery,water split,concentration ratio and pressure *** results show that mini-hydrocyclones are applicable to removing small-size MPs with the maximum concentra-tion ratio at 2.16 and the particle recovery at 51%.The flow characteristics inside the mini-hydrocyclones are analyzed in *** is shown that the distributions of water axial velocity and radial velocity could collectively affect the behaviors of small-size MPs in ***,a larger amount of water split could entrain more fine particles to ***,a less frequent alternation of radial velocity between the positive and negative directions on the same side of the cyclone should benefit the removal of small-size MPs.

关键词： Microplastics Mini-hydrocyclone Removal Experiment Simulation

Top-down法评定EDTA络合滴定法测定海洋沉积物中碳酸钙含量的不确定度

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化学分析计量 2024年第1期33卷 112-117页

作者：李强杨天邦黄雪华雷知生贺晓宇陈宋英广州海洋地质调查局天然气水合物勘查开发国家工程研究中心广州511458

依据Top-down技术中的质控图法对EDTA络合滴定法测定海洋沉积物中碳酸钙含量的不确定度进行评定。利用2021年质控样标准物质GBW 07333、GBW 07314和GBW 07316中CaCO_(3)测定值的时序数据进行评定,3组时序数据正态统计量A^(2*)(s)和独立... 详细信息

依据Top-down技术中的质控图法对EDTA络合滴定法测定海洋沉积物中碳酸钙含量的不确定度进行评定。利用2021年质控样标准物质GBW 07333、GBW 07314和GBW 07316中CaCO_(3)测定值的时序数据进行评定,3组时序数据正态统计量A^(2*)(s)和独立性统计量A^(2*)(RM)均小于1,CaCO_(3)测定值、A_(EWMi)和移动极差控制图没有失控点,3组时序数据处于受控状态。当CaCO_(3)质量分数分别为2.05%、6.20%和38.56%时,计算得其扩展不确定度分别为0.08%、0.07%和0.20%。将测量不确定度与对应含量值进行线性拟合建立了不确定度预测模型,GBW 07309和GBW 07334中CaCO_(3)的测量不确定度预测值分别为0.09%和0.18%,预测值与Top-down技术获取的评定结果较为吻合。

关键词：海洋沉积物碳酸钙不确定度评定质控图法络合滴定法

Pd/Al_2O_3表面上活性位性质及其与加氢反应动力学参数间的关系

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物理化学学报 1989年第6期5卷 760-764页

作者：陈诵英中国科学院山西煤炭化学所

近年发展起来的新的动态技术能够用于分离测定非均相催化反应的吸附平衡,吸附和表面反应速率系数,而中毒实验使人们能够测定催化剂表面上活性位的容量和强度性质。如果把两者结合起来(可称作动态中毒法)就有可能研究催化剂表面上活性位... 详细信息

近年发展起来的新的动态技术能够用于分离测定非均相催化反应的吸附平衡,吸附和表面反应速率系数,而中毒实验使人们能够测定催化剂表面上活性位的容量和强度性质。如果把两者结合起来(可称作动态中毒法)就有可能研究催化剂表面上活性位性质与其动力学参数间的关系。本文的目的,是要在作者早先工作的基础上,在三相浆态床反应器中。

关键词：钯/Al2O3 活性位加氢动力学参数

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利用标准等温线分析活性炭的完全孔分布

化工学报 1985年第3期1卷 373-379页

作者：陈诵英中国科学院山西煤炭化学研究所

利用我们从标准等温线性质发展的孔分布计算两个新方法——完全无模型孔分布计算法和改进的微孔分析法对有代表性的九个活性炭样品进行了完全孔分布分析.用吸附仪测量样品的低温氮吸附等温线,用Pickett方程关联了这些吸附等温线,发现n值... 详细信息

利用我们从标准等温线性质发展的孔分布计算两个新方法——完全无模型孔分布计算法和改进的微孔分析法对有代表性的九个活性炭样品进行了完全孔分布分析.用吸附仪测量样品的低温氮吸附等温线,用Pickett方程关联了这些吸附等温线,发现n值在1.1—1.4之间.因常数C值在100—300之间,选用标准等温线n2作为完全孔分布分析的依据.获得了总表面积、微孔的表面积和体积、非微孔的表面积和体积以及平均微孔水力半径等主要孔结构参数,并获得了所有样品的完全孔分布.两个比值SR和VR在0.9—1.1之间,结果是令人满意的.分析结果指出,DX-09-1-1,7S及J三个样品基本上全是微孔,而其余的炭毡及BPL炭样品都有相当数量的非微孔.这些结果说明,利用标准等温线进行活性炭样品的完全孔分布分析是实用的.

关键词：活性炭吸附剂微孔等温线热力学性质表孔分布

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动态方法测定吸附和表面反应速率

化学反应工程与工艺 1988年第3期4卷 89-101页

作者：陈诵英彭少逸中国科学院山西煤炭化学研究所

本文较详细地综述了在近些年来刚刚发展起来的能用于分离测定非均相催化反应中的吸附和表面反应速率的三种动态分析方法:催化反应色谱技术,动态一稳态法和浆化反应器中的动态分析。文中不仅介绍了三种方法的基本理论和一些有代表性的实... 详细信息

本文较详细地综述了在近些年来刚刚发展起来的能用于分离测定非均相催化反应中的吸附和表面反应速率的三种动态分析方法:催化反应色谱技术,动态一稳态法和浆化反应器中的动态分析。文中不仅介绍了三种方法的基本理论和一些有代表性的实验结果,也指出了它们在研究催化反应动力学和机理以及催化剂制备变量对其影响方面的重要意义和前景。

关键词：动态方法吸附表面反应催化