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热能动力工程 2016年第7期31卷 123-129,140页

作者：叶舟吴中旺詹培李春上海理工大学能源与动力工程学院上海200093 Shanghai City Key Laboratory on Multi-phase Flow and Heat Transfer in Power Engineering

采用有限元方法,基于Von-Mises失效理论,考虑平台结构阻尼和惯性载荷,利用ANSYS有限元软件和开源程序软件FAST分别研究了平台动态响应和结构应力。结果表明:螺旋侧板对Spar平台的自振频率没有明显影响;附加螺旋侧板可以有效减小平台在... 详细信息

采用有限元方法,基于Von-Mises失效理论,考虑平台结构阻尼和惯性载荷,利用ANSYS有限元软件和开源程序软件FAST分别研究了平台动态响应和结构应力。结果表明:螺旋侧板对Spar平台的自振频率没有明显影响;附加螺旋侧板可以有效减小平台在垂荡和纵摇方向的运动响应,但在纵荡方向上没有明显改善;螺旋侧板阻碍了海流的流动,增加了流动阻力,平台结构应力略有增加,且最大切应力约为最大等效应力的二分之一,但平台结构仍是安全的,而最大等效应力是影响平台安全稳定工作的关键。

关键词：漂浮式风力机 Spar平台结构优化强度动态响应

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叶片副翼摆角对两段式翼型气动性能的影响

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热能动力工程 2016年第9期31卷 45-51,132-133页

作者：祁良奎柳建华张良廖裕恺上海理工大学能源与动力工程学院上海200093 Shanghai City Key Laboratory on Multi-phase Flow and Heat Transfer in Power Engineering

以Spalart-Allmaras(S-A)湍流模型为计算模型,对风力机叶片NACA0018翼型在副翼摆角分别为0°、5°、10°和15°下的流体流动情况进行数值模拟,分析不同攻角下带副翼翼型上升阻力性能曲线以及翼型表面压力分布云图和流... 详细信息

以Spalart-Allmaras(S-A)湍流模型为计算模型,对风力机叶片NACA0018翼型在副翼摆角分别为0°、5°、10°和15°下的流体流动情况进行数值模拟,分析不同攻角下带副翼翼型上升阻力性能曲线以及翼型表面压力分布云图和流场流线图,研究不同摆角对带副翼翼型的空气动力学性能的影响。结果表明:相同攻角时,翼型的升力系数随着副翼摆角的增大而减小;副翼摆角的增大可以增大翼型的失速攻角,改善翼型周围流体的流动状况,提高翼型周围特别是副翼周围流体流动稳定性,抑制流动分离涡的形成。

关键词：副翼摆角失速涡

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基于气动弹性剪裁的风力机叶片模态分析

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热能动力工程 2016年第9期31卷 52-57,133-134页

作者：陈文朴李春叶舟缪维跑上海理工大学能源与动力工程学院上海200093 Shanghai City Key Laboratory on Multi-phase Flow and Heat Transfer in Power Engineering

本文为研究叶片铺层参数对叶片动态特性的影响,防止叶片产生共振,改善叶片力学特性,建立了1.5 MW风力机叶片的有限元模型,通过改变铺层角度和铺层纤维比例实现多种不同层合板结构的叶片铺层,并对上述各种铺层叶片结构进行了模态分析,获... 详细信息

本文为研究叶片铺层参数对叶片动态特性的影响,防止叶片产生共振,改善叶片力学特性,建立了1.5 MW风力机叶片的有限元模型,通过改变铺层角度和铺层纤维比例实现多种不同层合板结构的叶片铺层,并对上述各种铺层叶片结构进行了模态分析,获得了各模型的前六阶固有频率和振型,分析了铺层参数影响叶片动态特性的原因。结果表明:复合材料具有显著各向异性,通过改变铺层角度能影响固有频率大小;叶片低阶振型以挥舞和摆振为主,增加0°铺层比例能提高低阶固有频率;叶片高阶模态出现扭转,45°铺层能提高叶片抗扭能力,有利于增加高阶固有频率。

关键词：风力机叶片气动弹性剪裁模态

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Investigation on liquid film of urea-water solutions with diode laser absorption spectroscopy

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EXPERIMENTS IN FLUIDS 2015年第4期56卷 1-7页

作者： Yang, Huinan Guo, Xiaolong Zhou, Wu Chen, Benting Hu, Jiarui Su, Mingxu Cai, Xiaoshu Univ Shanghai Sci & Technol Sch Energy & Power Engn Shanghai 200093 Peoples R China Univ Shanghai Sci & Technol Shanghai Key Lab Multiphase Flow & Heat Transfer Shanghai 200093 Peoples R China

Measurement of multiparameter of liquid films (e.g., film thickness and concentration) is very important to understand the film formation processes in industrial applications. Here, a novel diode laser absorption spectroscopy (DLAS) sensor was developed to simultaneously measure the liquid film thickness and concentration of urea-water solutions by forming the transmittance ratio at two wave-number positions. The performance of the sensor employed two diode lasers (6613.25 and 7187.50 cm(-1)) was first validated using a calibration tool providing liquid film of urea-water solutions with known film thickness (100-1000 mu m) and mass fractions (5-50 wt%), and then, the sensor was applied to study a free-falling film of urea-water solutions on a vertical transparent quartz plate. Shadowgraph images were simultaneously taken as a means to obtain falling film thickness, and it was observed that measured film thickness was in good agreement with DLAS method and shadowgraph technique, and the deviation between these two techniques was 4.1 % when the falling film was stable.

关键词： Urea

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Numerical investigation of the yawed wake and its effects on the downstream wind turbine (vol 8, 033303, 2016)

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JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY 2016年第5期8卷

作者： Miao, Weipao Li, Chun Yang, Jun Xie, Xiaoyun Univ Shanghai Sci & Technol Sch Energy & Power Engn Shanghai 200093 Peoples R China Shanghai Key Lab Multiphase Flow & Heat Transfer Shanghai 200093 Peoples R China Xihua Univ Lab Fluid & Power Machinery Jinniu Dist 610000 Sichuan Peoples R China Shanghai Behr Thermal Syst Co Shanghai 201206 Peoples R China

A numerical simulation for the wake deviation effect in a wind farm is carried out using the full rotor model of the National Renewable Energy laboratory 5 MW wind turbine. The downstream wind turbine decreases its performance significantly due to the upstream wake interference. To reduce this effect, a control strategy based on the yaw angle is adopted to skew the trajectory of an upstream wake, thereby avoiding the downstream wind turbine and improving the efficiency of whole wind farm power generation. In this paper, the commercial CFD software STAR-CCM+ was used to simulate the wind farm which contains two tandem wind turbines operating in the atmospheric boundary layer condition. The results show that the wind farm's total power increases when the upstream wind turbine applies a yaw angle intentionally. According to the analysis of velocity contours, wake centerlines, and vortex structures, a counter-rotating blade tip vortex pair is observed to be responsible for the wake deviation effects concentrated on the hub height, which reveals that the influence of a yawed wake on the downstream wind turbine may be slightly underestimated.

关键词： Wind turbines

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Numerical investigation on flow-induced structural vibration and noise in centrifugal pump

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JOURNAL OF VIBROengineering 2016年第4期18卷 2448-2459页

作者： Chen, Eryun Zhao, Gaiping Li, Guoping Nan, Guofang Yang, Ailing Univ Shanghai Sci & Technol Sch Energy & Power Engn Shanghai 200093 Peoples R China Shanghai Key Lab Multiphase Flow & Heat Transfer Shanghai 200093 Peoples R China Univ Shanghai Sci & Technol Sch Med Instruments & Food Engn Shanghai 200093 Peoples R China Shanghai Marine Equipment Res Inst Shanghai 200031 Peoples R China

A full scale structural vibration and noise induced by flow was simulated by a hybrid numerical method. An interior flow field was solved by large eddy simulation firstly. The sliding mesh technique was applied to take into account the impeller-volute interaction. A sensitivity analysis on effects of near-wall grid size and sampling time on amplitude of pressure pulsations was performed to impose appropriate vibration exciting source. Computed modal of pump components was validated by experimental results, before the volute vibration and sound field were simulated using a coupled vibro-acoustic model. The numerical results indicated that the amplitude of pressure fluctuation, especially on those points located at near the volute tongue, strongly depended on near-wall grid size. The dominated frequency of the vibration velocity of volute was also blade-passing frequency (BPF), which was in according with frequency spectral characteristics of unsteady pressure fluctuation. Directivity distribution of radiation acoustic field excited by volute vibration was typical dipoles. This study shows that it is feasible to use the hybrid numerical method to evaluate the flow-induced vibration and noise generated in centrifugal pump.

关键词： pressure pulsation vibration and noise coupled vibro-acoustic model centrifugal pump

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Prediction of thermal performance of radiative radial fin with temperature-dependent thermal conductivity using spectral collocation method

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Journal of Computational and Theoretical Nanoscience 2016年第9期13卷 5822-5831页

作者： Ma, Jing Sun, Ya-Song Li, Ben-Wen Key Laboratory of Shaanxi Province for Development and Application of New Transportation Energy School of Automobile Chang'an University Xi'an710064 China Beijing Key Laboratory of Multiphase Flow and Heat Transfer for Low Grade Energy North China Electric Power University Beijing102206 China Institute of Thermal Engineering School of Energy and Power Engineering Dalian University of Technology Dalian116024 China

Spectral collocation method (SCM) is developed to solve coupled radiation and conduction in radiative radial fin with temperature-dependent thermal conductivity and volumetric heat generation. In this approach, energy conservation equation is discretized by SCM, and a particular algorithm is proposed to alleviate the nonlinearity of energy conservation equation. Numerical results by SCM are compared with available results in the literature, which indicate that SCM can provide high accuracy for combined radiative and conductive heat transfer in radiative radial fin, and the integral averaged relative error decreases exponentially with the increasing number of collocation points. Meanwhile, the effects of various parameters on the thermal performance, such as dimensionless thermal conductivity coefficient, radiation-conduction parameter, dimensionless ambient temperature, dimensionless radiation sink temperature and dimensionless volumetric heat generation are also investigated. Copyright © 2016 American Scientific Publishers All rights reserved.

关键词： Fins (heat exchange)

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The poisoning effect of heavy metals doping on Mn/TiO₂ catalyst for selective catalytic reduction of NO with NH₃

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JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 2015年 407卷 1-7页

作者： Guo, Rui-tang Wang, Qing-shan Pan, Wei-guo Chen, Qi-lin Ding, Hong-lei Yin, Xue-feng Yang, Ning-zhi Lu, Chen-zi Wang, Shu-xian Yuan, Yi-chao Shanghai Univ Elect Power Sch Energy Source & Mech Engn Shanghai Peoples R China Shanghai Engn Res Ctr Power Generat Environm Prot Shanghai Peoples R China Inner Mongolia Univ Environm & Resource Coll Hohhot Inner Mongolia Peoples R China Shanghai Key Lab Multiphase Flow & Heat Transfer Shanghai Peoples R China

Heavy metals have been proven to be of deactivation effect on SCR catalyst. In this paper, the poisoning effect of heavy metals (Zn and Pb) on Mn/TiO2 catalyst was investigated based on experimental and theoretical study. It was found that both of Zn and Pb had a poisoning effect on Mn/TiO2 catalyst and the poisoning effect of Zn was more obvious. The characterization results indicated that the doping of heavy metals on Mn/TiO2 surface would lead to a great decrease of reducibility, surface acidity and NO adsorption ability. The results of XPS characterization revealed the decrease of Mn4+ atomic concentration and chemisorbed oxygen species caused by the doping of heavy metals. Based on the above mentioned unfavorable properties, the doping of heavy metals would cause a serious deactivation of Mn/TiO2 catalyst. From the results of OFT calculations, it could be concluded that the doping of heavy metals on Mn/TiO2 catalyst resulting in a great decrease of NH3 adsorption capacity and NO adsorption ability, which agrees well with the experimental results. (C) 2015 Elsevier B.V. All rights reserved.

关键词： Mn/TiO2 catalyst Deactivation Zn Pb Characterization DFT

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The influence of F and Cl on Mn/TiO₂ catalyst for selective catalytic reduction of NO with NH₃: A comparative study

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CATALYSIS COMMUNICATIONS 2015年 71卷 84-87页

作者： Wang, Peng Wang, Qing-shan Ma, Xin-xia Guo, Rui-tang Pan, Wei-guo Shandong Univ Natl Engn Lab Coal Fired Pollutants Emiss Reduct Jinan 250100 Peoples R China Shanghai Univ Elect Power Sch Energy Source & Mech Engn Shanghai Peoples R China Shanghai Engn Res Ctr Power Generat Environm Prot Shanghai Peoples R China Shanghai Key Lab Multiphase Flow & Heat Transfer Shanghai Peoples R China

The effect of F and Cl on Mn/TiO2 catalyst for selective catalytic reduction of NO with NH3 was investigated in this study. It was found that the doping of F or Cl has a deactivation effect on Mn/TiO2 catalyst. And the poisoning effect of Cl is more serious than that of F. The characterization results showed that the decrease of BET surface area, the increase of crystallinity, the reduced reducibility and surface acidity, and the decreased concentrations of surface Mn4+ and chemisorbed oxygen should be responsible for the deactivation of Mn/TiO2 catalyst by the doping of F or Cl. (C) 2015 Elsevier B.V. All rights reserved.

关键词： Mn/TiO2 catalyst Deactivation F Cl Mechanism

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Analysis of subcooled boiling in PWR rod bundle channel

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Yuanzineng Kexue Jishu/Atomic Energy Science and Technology 2015年第9期49卷 1579-1585页

作者： Zhang, Rui Gan, Fu-Jun Zuo, Qiao-Lin Tian, Wen-Xi Su, Guang-Hui Qiu, Sui-Zheng State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an710049 China Shanghai Nuclear Engineering Research & Design Institute Shanghai200233 China

The RPI (Rensselaer Polytechnic Institute) wall boiling model, embedded in the context of two-fluid model of Fluent14.5, was applied to simulate subcooled boiling in core fuel bundle channel with mixing vanes and space grid. The subcooled boiling key parameters including flow field, temperature field and void fraction distribution were obtained. The analysis of the effect of mixing vanes and space grid on flow channel thermal-hydraulic characteristics was conducted. It is shown that the existence of space grid can cause a large pressure drop, and mixing vanes have a great influence on the key parameters of flow field and temperature field. The results of RPI model show a good agreement with Bartolemei experiment data. ©, 2015, Atomic Energy Press. All right reserved.

关键词： flow fields

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