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Conjugate Heat Transfer Investigation on the Cooling Performance of Air Cooled Turbine Blade with Thermal Barrier Coating

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Journal of Thermal Science 2016年第4期25卷 325-335页

作者： ji Yongbin ma Chao GE Bing ZANG Shusheng School of Mechanical and Power Engineering Shanghai Jiaotong University

A hot wind tunnel of annular cascade test rig is established for measuring temperature distribution on a real gas turbine blade surface with infrared ***,conjugate heat transfer numerical simulation is performed to obtain cooling efficiency distribution on both blade substrate surface and coating surface for *** effect of thermal barrier coating on the overall cooling performance for blades is compared under varied mass flow rate of coolant,and spatial difference is also *** indicate that the cooling efficiency in the leading edge and trailing edge areas of the blade is the *** cooling performance is not only influenced by the internal cooling structures layout inside the blade but also by the flow condition of the mainstream in the external cascade *** barrier effects of the coating vary at different regions of the blade surface,where higher internal cooling performance exists,more effective the thermal barrier will be,which means the thermal protection effect of coatings is remarkable in these *** the designed mass flow ratio condition,the cooling efficiency on the pressure side varies by 0.13 for the coating surface and substrate surface,while this value is 0.09 on the suction side.

关键词： gas turbine blade thermal barrier coating cooling efficiency conjugate heat transfer

Detection and mitigation of RFI in SBRS observation data

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Research in Astronomy and Astrophysics 2021年第8期21卷 111-123页

作者： zhen-Ping Qiang Jun Cheng zhen-Hong Shang Kai-Fan ji Fei Dai Hui Liu College of Big Data and Intelligent Engineering Southwest Forestry UniversityKunming 650224China CAS Key Laboratory of Solar Activity National Astronomical ObservatoriesBeijing 100101China Faculty of Information Engineering and Automation Kunming University of Science and TechnologyKunming 650504China Yunnan Observatories Chinese Academy of SciencesKunming 650216China

In view of the inconsistency of channel gains and a large amount of interference noise in Solar Broadband Radio Spectrometer(SBRS) observation data,they will seriously affect the analysis of SBRS *** this paper,a method of Radio Frequency Interference(RFI) detection and mitigation for SBRS observation data is ***,the SBRS observation data are preprocessed,a part of the observation data was selected to calculate the mean and variance to achieve the normalization of the entire observation data,which can avoid the influence of strong noise on the normalization ***,we proposed an adaptive threshold RFI detection method based on fusion wavelet transform reconstruction and an RFI elimination method based on neighborhood weighted *** is worth mentioning that to detect RFI interference signals of different magnitudes,we adopted an iterative approach to the RFI detection and mitigation *** qualitative analysis of real observation data and quantitative analysis of simulated data,it is shown that the method proposed in this paper can effectively eliminate RFI in SBRS observation data,and improve the quality of observation data for further scientific analysis.

关键词： spectrographs:SBRS techniques:image processing and spectroscopic Sun:radio radiation

Optical properties of one-dimensional soft photonic crystals with ferrofluids

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Frontiers of physics 2013年第1期8卷 1-19页

作者： Chun-zhen Fan Er-Jun Liang ji-Ping Huang School of Physical Science and Engineering and Key Laboratory of Materials Physics of Ministry of Education of China Zhengzhou University Zhengzhou 450052 China State Key Laboratory of Surface Physics and Department of Physics Fudan University Shanghai 200433 China

We review the recent theoretical study on the optical properties of one-dimensional soft photonic crystals (1D SPCs) with ferrofluids. The proposed structure is composed of alternating ferrofluid layers and dielectric layers. For the ferrofluid, single domain ferromagnetic nanoparticles can align to a chain under the stimuli of an external magnetic field, thus changing the microstructure of the system. Meanwhile, nonlinear optical responses in ferrofluids are also briefly reviewed.

关键词： soft photonic crystals ferrofluids band gap

OWC air chamber performance prediction under impulse turbine damping effects

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Science China(Technological Sciences) 2016年第4期59卷 657-666页

作者： LIU zhen HYUN BeomSoo jiN ji Yuan HONG KeyYong LEE YoungYeon Shandong Provincial Key Laboratory of Ocean Engineering Ocean University of China Qingdao Municipal Key Laboratory of Ocean Renewable Energy Ocean University of China College of Ocean Science and Technology Korea Maritime and Ocean University Ocean Plant Research Division Korea Research Institute of Ships and Ocean Engineering

Oscillating water columns(OWCs)are most widely used in coastal wave energy *** air duct opens into the atmosphere through the air turbine,which is the power take-off device,and this results in a pressure drop across the air ***,because of the complex configure of the impulse turbine and its high rotation speed,it is difficult to install it in the experimental simulator and numerical ***,the turbine damping effects on the operation of the OWC air chamber are induced to predict its performance more *** plates are used as a substitute for the impulse turbine as it generates a similar pressure drop and power output;the experimental and numerical pressure drops and output powers are compared.A 3D numerical wave tank based on the two-phase VOF model is established using the commercial CFD code Fluent,which can predict air flow and pressure variations in the chamber and *** surface elevations,air flow velocity and pressure variation inside the chamber with the orifice plate are studied numerically,and validated by the corresponding experimental *** air chamber of the Yongsoo OWC pilot plant is used as the engineering project *** operating performance of the air chamber installed with a 0.428D orifice plate as the substitute for the designed impulse turbine is computed and *** is found that the turbine damping effects will cause around 30%reduction in the peak values of the pneumatic energy output of the OWC air chamber in the resonant wave domain.

关键词： oscillating water column air chamber turbine damping effects pressure drop orifice plate operating performance

Chinese Journal of Chemistry: Entering the Third Decade in 2012

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Chinese Journal of Chemistry 2012年第1期30卷 3-4页

作者： Guozhen ji Shengming ma Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

The year 2011 was a very busy and productive one for the Chinese Journal of Chemistry ( CJC). Besides the regular day-to-day efforts to improve the quality of the journal and cope with the increasing numbers of sub- m... 详细信息

关键词：《中国化学:英文版》期刊摘要编辑部

A Decade of Fruitful Cooperation

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Chinese Journal of Chemistry 2015年第1期33卷 3-4页

作者： Guozhen ji Shengming ma Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

Chinese Journal of Chemistry was launched by Pro-fessor Yu Wang and Professor Wei-Yuan Huang under the original name Acta Chimica Sinica English Edition published by Shanghai Institute of Organic Chemistry(SIOC)and Chinese Chemical Society in *** has been published by SIOC and Wiley-VCH since *** years have passed in the twinkling of an *** changes have there been about this journal during the last decade?

关键词： journal passed Society

Pursuing a Higher Goal in the Year of the Horse

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Chinese Journal of Chemistry 2014年第1期32卷 3-4页

作者： Guozhen ji[*] Shengming ma Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China Email: Guozhen ji (jigz@***) Shengming Ma (masm@***)[*]Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

An introduction is presented in which the editors discuss various special issues in 2014 on topics including biopolymers, solar cells, and nanochemistry.

关键词： BIOPOLYMERS NANOCHEMISTRY SOLAR cells

EXPERIMENTAL AND NUMERICAL STUDY FOR HYDRODYNAMIC CHARACTERISTICS OF AN OSCILLATING HYDROFOIL

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Journal of Hydrodynamics 2008年第3期20卷 280-287页

作者： LIU zhen HYUN Bcom-soo KIM Moo-rong jiN ji-yuan College of Engineering Ocean University of China Qingdao 266100 China College of Ocean Science and Technology Korea Maritime University Busan 606791 Korea maritime and Ocean Engineering Research Institute Daejeon 305-343 Korea

The present article reports the experimental Particle Image Velocimetry （PIV） investigation and the corresponding numerical simulation results about the water flow over the oscillating hydrofoil and its unsteady dynamic characters. The experimental study focuses on the effect of mean angles of attack. The comparison between the PIV results and numerical prediction about the flow field using Fluent well demonstrates the capability of CFD on the simulation of the water flow around the pitching hydrofoil. The numerical results indicate that the forced oscillating frequencies have evident effects on the flow separation and vortex shedding. The simulations about the hydrodynamic drag and lift coefficients were also performed.

关键词： Particle Image Velocimetry (PIV) oscillating hydrofoil numerical simulation Fluent flow field force characteristics

Chinese Journal of Chemistry- Going International!

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Chinese Journal of Chemistry 2011年第1期29卷 1-2页

作者： ji, Guozhen ma, Shengming

We just concluded a special publishing year： 2010 marked the 60th anniversary of the Shanghai Institute of Organic Chemistry （SIOC）, Chinese Academy of Sciences, the founder and sponsor of the Chinese Journal of Chemistry. To celebrate the 60th birthday of the SIOC, we published a special issue in September with contributions from many great scientists at SIOC and many editorial board members of the three journals published by the SIOC. We would like to express our heartfelt gratitude to all authors, editorial board members and referees for their contributions to this special 1SSHe

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