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| 1 | Gold nanoparticle/ZnO nanorod hybrids for enhanced reactive oxygen species generation and photodynamic therapy显示文摘金 nanoparticle (Au NP )@ ZnO nanorod (NR )(Au@ZnO ) 有各种各样的 ZnO 的混血儿: Au 臼齿的比率被开发在光力学的治疗(太平洋夏季时间) 提高反应的氧种类(ROS ) 的产生应用程序。介绍在 Au NP 和 ZnO NR 之间的一个金属 / 半导体 heterostructure 接口调制了电子转移在下面紫外(紫外) 照耀,它戏剧性地在 ZnO 压制了电子洞再结合并且同时在 Au NP 表面与高精力增加了激动的电子的数量。因此, nanohybrid 的 ROS 收益更加独自太古的 Au NP 或 ZnO NR 在那些上被改进并且表明了 1 + 1 > 2 效果。这改进随混血儿的 Au 的比例的增加被加强。结果证明有 ZnO 的 Au@ZnO nanohybrids : 因为他们有在 Au 和 ZnO 之间的最大的接口区域, 20:1 的 Au 比率产生了最高的 ROS 收益,它接着在太平洋夏季时间期间为 HeLa 和 C2C12 房间导致了最低房间生存能力。而且, ROS 产生和房间破坏断然与 nanohybrid 剂量被相关。Au@ZnO 混血儿(20:1, 100 g/mL ) 导致了为 2 min 象 28% 一样在紫外暴露以后低的 HeLa 房间生存能力,它显示了它的有希望的潜力改进太平洋夏季时间的治疗学的功效。 | Zhuo Kang Xiaoqin Yan Lanqing Zhao Qingliang Liao Kun Zhao Hongwu Du Xiaohui Zhang Xueji Zhang Yue Zhang | 2015 | Nano Research2015，8，6： | 7 |
| 2 | Numerical Simulation on the Effect of Tip Clearance Size on Unsteadiness in Tip Clearance Flow显示文摘有三种不同尖端清理尺寸的尖端清理流动的摇摆数字地在这篇论文被调查。NASA 转子 67 被选择为计算模型。尖端清理的尺寸什么时候等于,被发现在所有模仿的案例之中,摇摆存在或比设计尖端清理尺寸大。相对全部的压力系数轮廓显示由尖端漏流动的影响的那个区域以固定集体流动率随尖端清理尺寸的增加扩充。在转子尖端区域的静态的压力分发的根吝啬的方形的轮廓被提供为设计尖端清理(1.1%尖端弦)说明那最强壮的波动 区域在前缘附近位于片的压力方面,当时为更大的尖端清理(2.2%尖端弦),它在在冲击波和尖端漏流动之间的相互作用的区域。 | Juan Du Feng Lin Hongwu Zhang Jingyi Chen | 2008 | Journal of Thermal Science2008，17，4： | 5 |
| 3 | Application of Fast Wavelet Analysis on Early Stall Warning in Axial Compressors显示文摘The timely detection of stall inception is of great significance for safe operation and stability control of axial compressor. In the current study, a fast wavelet tool was selected to predict stall precursor in axial compressors with spike-type and modal-wave stall inception. Dynamic pressure was measured in the casing wall by using a collection of time-resolved pressure transducers with circumferential and chord-wise spatial resolution. Fast wavelet analysis with low frequency reconstruction results demonstrate that the initial inception can be detected 110 rotor revolutions prior to stall for modal-wave stall inception in a 1.5 stage axial compressor. For spike-type stall inception, despite the failure of early stall warning via low frequency reconstruction, an increase amplitude frequency band of 0.2–0.8 blade passing frequency was identified using high frequency reconstruction in an isolated-rotor axial compressor. Fast wavelet method can predict two kinds of stall inceptions simultaneously in advance and realize the early stall warning in axial compressors through a reasonable selection of reconstructed frequency. | LIU Yang LI Jichao DU Juan LI Fan ZHANG Hongwu | 2019 | Journal of Thermal Science2019，28，5： | 5 |
| 4 | Entropy Generation Analysis in a Mixed-Flow Compressor with Casing Treatment显示文摘Casing treatments(CT) can effectively extend compressors flow ranges with the expense of efficiency penalty. Compressor efficiency is closely linked to loss. Only revealing the mechanisms of loss generation can design a CT with high aerodynamic performance. In the paper, a highly-loaded mixed-flow compressor with tip clearance of 0.4 mm was numerically studied at a rotational speed of 30,000 r/min to reveal the effects of axial slot casing treatment(ASCT) on the loss mechanisms in the compressor. The results showed that both isentropic efficiency and stall margin were improved significantly by the ASCT. The local entropy generation method was used to analyze the loss mechanisms and to quantify the loss distributions in the blade passage. Based on the axial distributions of entropy generation rate, for both the cases with and without ASCT, the peak entropy generation rate increased in the rotor domain and decreased in the stator domain during throttling the compressor. The peak entropy generation in rotor was mainly caused by the tip leakage flow and flow separations near the rotor leading edge for the mixed-flow compressor no matter which casing was applied. The radial distributions of entropy generation rate showed that the reduction of loss in the rotor domain from 0.4 span to the rotor casing was the major reason for the efficiency improved by ASCT. The addition of ASCT exerted two opposite effects on the losses generated in the compressor. On the one hand, the intensity of tip leakage flow was weakened by the suction effect of slots, which alleviated the mixing effect between the tip leakage flow and main flow, and thus reduced the flow losses;On the other hand, the extra losses upstream the rotor leading edge were produced due to the shear effect and to the heat transfer. The aforementioned shear effect was caused by the different velocity magnitudes and directions, and the heat transfer was caused by temperature gradient between the injected flow and the incoming flow. For case with smooth casing(SC), 61.61% of the overall loss arose from tip leakage flow and casing boundary layer. When the ASCT was applied, that decreased to 55.34%. The loss generated by tip leakage flow and casing boundary layer decreased 20.54% relatively by ASCT. | ZHANG Qianfeng DU Juan LI Zhihui LI Jichao ZHANG Hongwu | 2019 | Journal of Thermal Science2019，28，5： | 5 |
| 5 | Dual stability enhancement mechanisms of axial-slot casing treatment in a high-speed mixed-flow compressor with various tip clearances显示文摘The influence of Axial-Slot Casing Treatment(ASCT)on the performance and stability enhancement mechanisms of ASCT were experimentally and numerically investigated in a highspeed mixed-flow compressor under three different tip clearances.Unsteady simulations showed the compressor stalled through end-wall stall route,i.e.the spike stall inception originating from rotor tip region,which was validated by dynamical measurements.When the ASCT was applied,greater than 20%of Stall Margin Improvement(SMI)could be achieved for the compressor under each tip clearance size.The streamwise velocity contours and flow structures in the tip region and axial slots were deeply analyzed to explore how the so called‘‘suction and injection effects'generated by the ASCT manipulate tip clearance flow and enhance the stability of compressor under different tip clearances.It was found that the dominant stability enhancement mechanisms of ASCT varies with tip clearance size for the mixed-flow compressor.(A)For the small tip clearance,the dominant mechanism of stability enhancement is the blockage reduction generated in the blade passage by the suction effect of ASCT.(B)For the large tip clearance,the injection effect of the ASCT is the dominant mechanism of stability enhancement with ASCT,which plays the leading role in delaying the spillage of incoming/tip leakage flow interface at the rotor Leading Edge(LE)plane. | Qianfeng ZHANG Juan DU Jichao LI Ming ZHAO Hongwu ZHANG | 2021 | Chinese Journal of Aeronautics2021，34，4： | 2 |
| 6 | Microalgal Cultivation in Secondary Effluents:Enhancement of Algal Biomass,Nutrient Removal,and Lipid Productivity显示文摘The growth performance,nutrient removal,lipid accumulation and morphological changes of Cyanobacterium aponinum OUC1 and Scenedesmus obliquus which were cultured in secondary effluents from two wastewater treatment plants:Tuandao Wastewater Treatment Plant(ETD)and Licun River Wastewater Treatment Plant(ELR)were investigated.The results showed that both C.aponinum OUC1 and S.obliquus have superior growth performances in both undiluted effluents,while the better of them was that in ETD effluent,with cell densities of C.aponinum OUC1 and S.obliquus increased by 159%and 66%over that of BG11(control),respectively.Regarding nutrient removal,S.obliquus could completely remove inorganic phosphorus,and decrease ammonia nitrogen in ETD effluent by 81%.In addition,both C.aponinum OUC1 and S.obliquus cultivated in ETD exhibited extraordinary potential for biofuel production,increasing lipid productivities by 133%and 89%of that cultivated in ELR,respectively.As to ultrastructural changes,the differences in the lipoidal globules and glycogen granules of S.obliquus and C.aponinum OUC1 among the ETD and ELR treatments were mostly related to phosphorus limitations.The findings from this research reveal the probability using the secondary effluents as cultivation media to enhance algal biomass,nutrient removal and lipid productivity. | ZHANG Bo MENG Fanping CUI Hongwu DOU Xiang DU Shuhao PENG Xiaoling | 2020 | Journal of Ocean University of China2020，19，6： | 1 |
| 7 | Numerical investigation on the self-induced unsteadiness in tip leakage flow for a transonic fan rotor显示文摘 | DU Juan LIN Feng ZHANG Hongwu | 2010 | Journal of Turbomachinery2010，132，： | 1 |
| 8 | A multi-channel full-duplex 60GHz-band radio-over-fiber system 显示文摘 | Yang Hongwu Sun Junqiang Du Qiujiao | 2010 | Optik2010，121，22： | 1 |
| 9 | Develop- ment of Miniaturized Competitive Immunoassays on a Protein Chip as a Screening Tool for Drugs显示文摘 | Hongwu Du Moutian Wu Weiping Yang Gu Yuan | 2005 | Clinical Chemistry2005，51，2： | 1 |
| 10 | Parallel detection and quantification using nine immunoassays in a protein microarray for drug from serum samples显示文摘 | Du Hongwu Yang Weiping Xing Wanli | 2005 | Biomed Microdevices2005，7，2： | 1 |
| 11 | Aerodynamic Performance Improvement of a Highly Loaded Compressor Airfoil with Coanda Jet Flap显示文摘Coanda jet flap is an effective flow control technique,which offers pressurized high streamwise velocity to eliminate the boundary layer flow separation and increase the aerodynamic loading of compressor blades.Traditionally,there is only single-jet flap on the blade suction side.A novel Coanda double-jet flap configuration combining the front-jet slot near the blade leading edge and the rear-jet slot near the blade trailing edge is proposed and investigated in this paper.The reference highly loaded compressor profile is the Zierke&Deutsch double-circular-arc airfoil with the diffusion factor of 0.66.Firstly,three types of Coanda jet flap configurations including front-jet,rear-jet and the novel double-jet flaps are designed based on the 2D flow fields in the highly loaded compressor blade passage.The Back Propagation Neural Network(BPNN)combined with the genetic algorithm(GA)is adopted to obtain the optimal geometry for each type of Coanda jet flap configuration.Numerical simulations are then performed to understand the effects of the three optimal Coanda jet flaps on the compressor airfoil performance.Results indicate all the three types of Coanda jet flaps effectively improve the aerodynamic performance of the highly loaded airfoil,and the Coanda double-jet flap behaves best in controlling the boundary layer flow separation.At the inlet flow condition with incidence angle of 5°,the total pressure loss coefficient is reduced by 52.5%and the static pressure rise coefficient is increased by 25.7%with Coanda double-jet flap when the normalized jet mass flow ratio of the front jet and the rear jet is equal to 1.5%and 0.5%,respectively.The impacts of geometric parameters and jet mass flow ratios on the airfoil aerodynamic performance are further analyzed.It is observed that the geometric design parameters of Coanda double-jet flap determine airfoil thickness and jet slot position,which plays the key role in supressing flow separation on the airfoil suction side.Furthermore,there exists an optimal combination of front-jet and rear-jet mass flow ratios to achieve the minimum flow loss at each incidence angle of incoming flow.These results indicate that Coanda double-jet flap combining the adjust of jet mass flow rate varying with the incidence angle of incoming flow would be a promising adaptive flow control technique. | ZHANG Jian DU Juan ZHANG Min CHEN Ze ZHANG Hongwu NIE Chaoqun | 2022 | Journal of Thermal Science2022，31，1： | 1 |
| 12 | Highly stable aqueous phase black phosphorus quantum dots with enhanced fluorescence property显示文摘Black phosphorus quantum dots(BPQDs)are a kind of outstanding optical material due to the tunable band structure.However,their fluorescence property and stability are obviously weakened in the aqueous phase,which extremely restricts the development of BPQDs.Here,we propose a new method to prepare stable BPQDs in an aqueous solution directly with high absolute fluorescence quantum yield.Aqueous phase BPQDs are synthesized by liquid exfoliation and hydrothermal with NH_(2)-polyethylene glycol(PEG)-NH_(2) as the modification agent to protect the BPQDs,which have high stability more than six months.In addition,NH_(2)-PEG-NH_(2) is also a surface passivation agent to enhance the emission of BPQDs by forming P-N bonds,which is confirmed by an absolute fluorescent quantum yield of 11.5%.Moreover,BPQDs show excellent resistance to a strong acid environment and high ionic strengths except for Fe^(3+).Therefore,the BPQDs are a kind of highly selective and linear response fluorescence probe for Fe^(3+).Considering the good biocompatibility of BPQDs,they are employed as cell fluorescent label probes and show excellent fluorescence imaging contrast.Based on the unique structural stability and fluorescence performance in the aqueous phase,BPQDs are potential candidates for Fe^(3+)detection and optical bio-imaging. | Yingli Ma Xiaoguang Xu Xiaoshuang Zhang Mayifei Rong Liying Lu Yan Li Wenhao Dai Hongwu Du Yong Jiang | 2022 | Journal of Materials Science & Technology2022，，21： | 0 |
| 13 | A Review on Theoretical and Numerical Research of Axial Compressor Surge显示文摘Surge is an unstable operating condition of the aero-engine that can move the engine into a destabilized state and cause devastating damage.One of the most popular topics in the academic and industrial communities is to figure out the mechanism of the surge and withdraw from the surge safely.Based on rig test results and practical data from engine operation,various theories of surge mechanisms have been proposed by researchers,and some classical analytical models have been developed for modelling and prediction.In recent years,with the rapid development of numerical simulation and the improvement of computational capability,computational fluid dynamics(CFD)has been widely applied to the investigation of axial compressor surge events.In this review,the principles and general characteristics of the surge phenomenon are first introduced.Subsequently,the main theoretical models and CFD simulations are presented,and their advantages and disadvantages are discussed.In conclusion,we have proposed potential improvements and future technical routes for the surge phenomenon.The purpose of this paper is to provide a valuable reference for surge studies on axial compressors. | ZHAO Hongliang DU Juan ZHANG Wenqiang ZHANG Hongwu NIE Chaoqun | 2023 | Journal of Thermal Science2023，32，1： | 0 |
| 14 | Special Issue for Asian Congress on Gas Turbines 2020(ACGT2020)显示文摘The special issue of Journal of Thermal Science(JTS)is dedicated to the Asian Congress on Gas Turbines 2020(ACGT2020).ACGT is an international conference on advanced technologies of gas turbine,which was established in 2005 and held in turn by the Gas Turbine Society of Janpan(GTSJ),Korean Society for Fluid Machinery(KSFM),Chinese Society of Engineering Thermophysics(CSET),and India Institute of Technoloty Bomby(IIT Bombay)every two years. | ZHU Junqiang HUANG Weiguang ZHANG Hongwu DU Juan | 2022 | Journal of Thermal Science2022，31，1： | 0 |
| 15 | Adaptive feedback control of stability in an axial compressor with circumferential inlet distortion显示文摘The adaptive feedback control of stability with circumferential inlet distortion has been experimentally investigated in a low-speed,axial compressor.The flat-baffles with different span heights are used to simulate different distorted inflow cases.Compared with auto-correlation and root-mean-square analysis,cross-correlation analysis used to predict early stall warning does not depend on the distortion position.Hence,the cross-correlation coefficient was used to monitor the stable status of the compressor and provide the feedback signal in the active control strategy when suffering from different distortions.Based on the stall margin improvement of tip air injection obtained under different distorted inflow cases and the sensitivity analysis of cross-correlation coefficients to injected momentum ratios,tip air injection was adopted as the actuator for adaptive feedback control.The digital signal processing controller was designed and applied to achieve adaptive feedback control in distorted inflow conditions.The results show that the adaptive feedback control of air injection nearly achieves the same stall margin improvement as steady air injection under different distortion intensities with a reduced injection mass flow.Thus,the proposed adaptive feedback control method is ideal for the engine operation with circumferential distorted inflow,which frequently occurs in flight. | Juan DU Yang LIU Jichao LI Wenqiang ZHANG Hongwu ZHANG Chaoqun NIE | 2023 | Chinese Journal of Aeronautics2023，36，5： | 0 |
| 16 | Special column for the memory of Professor CHEN Naixing显示文摘The special column of Journal of Thermal Science (JTS) is dedicated to the late Professor CHEN Naixing, who passed away on the 6th of August of 2018 when he was turning 85 years old. Professor Chen received his postgraduate degree from Bauman State Technical University in Moscow in 1958. Before he joined the Institute of Engineering Thermophysics of Chinese Academy of Sciences in 1980, he also worked for Harbin Turbine Factory, the Naval Research Center, and the Institute of Mechanics of Chinese Academy of Sciences. | NIE Chaoqun ZHANG Hongwu DU Juan | 2019 | Journal of Thermal Science2019，28，5： | 0 |
| 17 | Hybrid Slot-Groove Casing Treatment for Stall Margin Improvement on an Axial Flow Compressor with Circumferential Total Pressure Distortion显示文摘The hybrid slot-groove(S-G)casing treatment(CT),which combines the advantages of slot and groove in consideration of stall margin enhancing and efficiency penalty,was experimentally investigated under circumferential distorted inflows.Previous experiments showed that the hybrid S-G CT can extend the stability by 19.79%with uniform inflow condition.To further estimate its stability enhancement ability with distorted inflow,three types of circumferential total pressure distortion inflow that the distorted intensities(DC(60))are equal to 0.90%,4.12%,and 24.75%,are selected to conduct a serial of experiments.Results demonstrated that the stability of the compressor were deteriorated by 7.87%,9.19%and 39.08%respectively under three distorted inflows.It was founded that,under the above-mentioned distorted inflows,the hybrid S-G CT was able to extend the stability by 18.48%,17.81%,and 13.80%,respectively,which proved the strong anti-distortion ability of the hybrid S-G CT.By using the dynamic pressure sensors fixed on the casing wall,the unsteady measurements demonstrated that the stall precursor with uniform and circumferential distorted inflows are always spiky-wave;thus the hybrid S-G CT can play an excellent stability enhancement capability.The analytical results with power spectral density proved that,when at the same flow point,the perturbation,with frequency being around the rotating stall frequency band,was distinctly suppressed by hybrid S-G CT,thus delaying the rotating stall.The stall precursor detected in the casing wall depicted that unlike the short length-scale of stall precursor(5–6 blade passage)under smooth casing;the hybrid S-G CT can create a stall precursor with long length-scale.Under the distortion intensities from 0 to 4.12%,the length scale of the stall precursors occupies approximately 10–12 blade passages.As the distortion intensity further increases to 24.75%,the length scale of stall precursor increases to occupy 16–17 blade passages.This phenomenon can guide the stall warning studies with compressors using CT in the future. | LI Yihan LI Jichao YANG Chen DU Juan ZHANG Hongwu NIE Chaoqun | 2023 | Journal of Thermal Science2023，32，2： | 0 |
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