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Experimental and numerical study of combustion characteristics of ammonia-hydrogen-air swirling flame with/without secondary air injection

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Chinese Journal of Aeronautics 2024年第4期37卷 243-255页

作者： Chunyu LIU Chenhu GAO Yue HUANG Hua JIN Dan ZHAO Wenjiang XU yancheng YOU School of Aerospace Engineering Xiamen UniversityXiamen 361005China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China department of Mechanical Engineering University of CanterburyChristchurch 8041New Zealand

Ammonia (NH_(3)) is currently considered to be a potential carbon-free alternative fuel,and its large-scale use as such would certainly decrease greenhouse gas emissions and meet increasingly stringent emission *** the low flame propagation speed and high NO production of NH_(3) hinder its direct application as a renewable fuel,co-combustion of NH_(3)–H_(2)is an effective way to overcome these *** this study,the combustion characteristics of NH_(3)–H_(2)swirling flames under different equivalence ratios and H_2blending ratios conditions are both numerically and experimentally ***,the One-Dimensional (1.) laminar flame computation presents a comparison base and the Three-Dimensional (3D) numerical simulation yields detailed flame property ***,the high-speed camera takes instantaneous swirl flame images and the gas analyzer measures the NO emission at the exit plane of the flame *** and quantitative analysis is performed on the flame structure and NO emission for a series of NH_(3)–H_(2)swirl *** variation trends of the NO emission calculated using different techniques agree very *** quantitative results show that the NO emissions are much higher at lean equivalence ratios than those at rich equivalence ratios,and such difference is closely related to the combustion flame ***,it is shown that the utilization of secondary air injection can achieve a significant reduction in NO emissions at the exit of the combustion chamber at equivalence ratios less than or equal to 0.9.

关键词： Ammonia combustion Swirling flow NO emission characteristics Secondary combustion Chemical reaction mechanism

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Tissue adhesive,ROS scavenging and injectable PRP-based‘plasticine’for promoting cartilage repair

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Regenerative Biomaterials 2024年第1期3卷 94-107页

作者： Shiao Li Dawei Niu Haowei Fang yancheng Chen Jinyan Li Kunxi Zhang Jingbo Yin Peiliang Fu department of Orthopedics Shanghai Changzheng HospitalNaval Medical UniversityShanghai 200003P.R.China department of Polymer Materials School of Materials Science and EngineeringShanghai UniversityShanghai 200444P.R.China

Platelet-rich plasma(PRP)that has various growth factors has been used clinically in cartilage ***,the short residence time and release time at the injury site limit its therapeutic *** present study fabricated a granular hydrogel that was assembled from gelatin microspheres and tannic acid through their abundant hydrogen *** microspheres with the gelatin concentration of 1.wt%and the diameter distribution of 1.1. lm were used to assemble by tannic acid to form the granular hydrogel,which exhibited elasticity under low shear strain,but flowability under higher shear *** viscosity decreased with the increase in shear ***,the granular hydrogel exhibited self-healing feature during rheology ***,granular hydrogel carrying PRP not only exhibited well-performed injectability but also performed like a‘plasticine’that possessed good *** granular hydrogel showed tissue adhesion ability and reactive oxygen species scavenging *** hydrogel carrying PRP transplanted to full-thickness articular cartilage defects could integrate well with native cartilage,resulting in newly formed cartilage articular fully filled in defects and well-integrated with the native cartilage and subchondral *** unique features of the present granular hydrogel,including injectability,plasticity,porous structure,tissue adhesion and reactive oxygen species scavenging provided an ideal PRP carrier toward cartilage tissue engineering.

关键词： cartilage regeneration granular hydrogel gelatin tannic acid PRP

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Embedding Perovskite in Polymer Matrix Achieved Positive Temperature Response with Inversed Temperature Crystallization

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Energy & Environmental Materials 2024年第5期7卷 361-371页

作者： Meiting Peng Xue Guan Yingzhu Wu Nan Zhang Qi Feng Liyong Tian yancheng Wu Yangfan Zhang Feng Gan Fuqin Deng Meilin Huang Guichuan Xing Ningbo Yi college of Textile Science and Engineering Wuyi University Institute of Applied Physics and Materials Engineering University of Macau School of Applied Physics and Materials Wuyi University Faculty of Intelligent Manufacturing Wuyi University

Organic perovskites are promising semiconductor materials for advanced photoelectric applications. Their fluorescence typically shows a negative temperature coefficient due to bandgap change and structural instability. In this study, a novel perovskite-based composite with positive sensitivity to temperature was designed and obtained based on its inverse temperature crystallization, demonstrating good flexibility and solution processability. The supercritical drying method was used to address the limitations of annealing drying in preparing high-performance perovskite. Optimizing the precursor composition proved to be an effective approach for achieving high fluorescence and structural integrity in the perovskite material. This perovskite-based composite exhibited a positive temperature sensitivity of28.563%℃-1.or intensity change and excellent temperature cycling reversibility in the range of 25–40℃in an ambient environment. This made it suitable for use as a smart window with rapid response. Furthermore, the perovskite composite was found to offer temperature-sensing photoluminescence and flexible processability due to its components of perovskite-based compounds and polyethylene oxide. The organic precursor solvent could be a promising candidate for use as ink to print or write on various substrates for optoelectronic devices responding to temperature.

关键词： flexibility inversed temperature crystallization perovskite positive temperature response

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BGP reflection functors in root categories

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Science China mathematics 2005年第8期48卷 1033-1045页

作者： XIAO Jie, ZHANG Guanglian1.2 & ZHU Bin department of Mathematical Sciences, Tsinghua University, Beijing 1.0084, China {1., yancheng teachers college, yancheng 2.4002. China 1. department of Mathematical Sciences Tsinghua University 100084 Beijing China 2. department of mathematics Yancheng Teachers College 224002 Yancheng China

We define the BGP-reflection functors in the derived categories and the root categories. By Ringel's Hall algebra approach, the BGP-reflection functor is applicable to obtain the classical Weyl group action on the Lie... 详细信息

关键词： m-cycle complexes, derived categories, BGP-reflections, Kac-Moody algebras.

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Normal TL-subgroups of TL-subgroup

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模糊系统与数学 1997年第4期 48-53页

作者： Yu Yandong(department of mathematics,{1. teachers college,{1.,2.4002.Wang Zhudeng({1. Technician School,{1.,2.4002.)

ＮｏｒｍａｌＴＬ－ｓｕｂｇｒｏｕｐｓｏｆＴＬ－ｓｕｂｇｒｏｕｐＮｏｒｍａｌＴＬ－ｓｕｂｇｒｏｕｐｓｏｆＴＬ－ｓｕｂｇｒｏｕｐＹｕＹａｎｄｏｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＹａｎｃｈｅｎｇＴｅａ... 详细信息

ＮｏｒｍａｌＴＬ－ｓｕｂｇｒｏｕｐｓｏｆＴＬ－ｓｕｂｇｒｏｕｐＮｏｒｍａｌＴＬ－ｓｕｂｇｒｏｕｐｓｏｆＴＬ－ｓｕｂｇｒｏｕｐＹｕＹａｎｄｏｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＹａｎｃｈｅｎｇＴｅａｃｈｅｒｓＣｏｌｅｇｅ，Ｙａｎｃｈ...

关键词： ,Algebra Group TL-subgroup Normal TL-subgroup Normal TL-subgroups of TL-subgroup

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The Green formula and heredity of algebras

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Science China mathematics 2005年第5期48卷 610-617页

作者： ZHANG Guanglian & WANG Shuai department of Mathematical Sciences, Tsinghua University, Beijing 1.0084, China {1. teachers college, {1. 2.4002. China department of mathematics, Johns Hopkins University, Baltimore, MD21.1., U.S.A. 1. department of Mathematical Sciences Tsinghua University 100084 Beijing China 2. yancheng teachers college 224002 Yancheng China 3. department of mathematics Johns Hopkins University 21218 Baltimore MD USA

Let A be a finite dimensional algebra over a field k with q elements. It is shown that the Green formula is true in mod-A if and only if A is a hereditary algebra.

关键词： Green formula idempotent ideal hereditary algebra.

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TL-subrings　and　TL-ideals,Part3:Maximal　TL-ideals　and　ireducible　 TL-ideals

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模糊系统与数学 1997年第1期 18-25页

作者： Yu Yandong (department of mathematics,{1., yancheng 2.4002. Wang Zhudeng (yancheng Technician School, 2 South Daxing Road, yancheng, 2.4002.

ＴＬｓｕｂｒｉｎｇｓａｎｄＴＬｉｄｅａｌｓ，Ｐａｒｔ３：ＭａｘｉｍａｌＴＬｉｄｅａｌｓａｎｄｉｒｅｄｕｃｉｂｌｅＴＬｉｄｅａｌｓＹｕＹａｎｄｏｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，Ｙａｎｃｈ... 详细信息

ＴＬｓｕｂｒｉｎｇｓａｎｄＴＬｉｄｅａｌｓ，Ｐａｒｔ３：ＭａｘｉｍａｌＴＬｉｄｅａｌｓａｎｄｉｒｅｄｕｃｉｂｌｅＴＬｉｄｅａｌｓＹｕＹａｎｄｏｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＹａｎｃｈｅｎｇＴｅａｃｈｅｒｓＣｏｌｅｇｅ...

关键词： Algebra ideal TL ideal maximal TL left (right, two sided) ideal generalized maximal TL left (right, two sided) ideal irreducible TL ideal.

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Exponential attractors of the nonlinear wave equations

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Chinese Science Bulletin 1998年第16期43卷 1331-1335页

作者： DAI Zhengde 1.and MA Dacai 2 1. department of mathematics, Yunnan University, Kunming 650031. China 2. department of mathematics, Shangrao teachers college, Shangrao 334000, China department of mathematics Yunnan University Kunming China department of mathematics Shangrao Teachers College Shangrao China

The (E, E)-type exponential attractors for the nonlinear wave equation were obtained by using the decomposition of operators and finite covering *** results solves the open problem of Eden et al.

关键词： nonlinearity wave equations exponential attractors.

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Explicit expressions and recurrence formulas of radial average value for N-dimensional hydrogen atom

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原子与分子物理学报 2002年第2期19卷 201-204页

作者： CHEN Chang-yuan, SUN Dong-sheng, LIU You-we, LIU Cheng-lin(department of Physics,{1., yancheng 2.4002. China) department of Physics Yancheng Teachers College Yancheng 224002

In this paper, two recurrence formulas for radial average values of N-dimensional hydrogen atom are derived. Explicit expressions for are given for 3≥s≥-6. These results can be applied to discuss average value of centrifugal potential energy and other physical quantities. The relevant results of the usual hydrogen atom are contained in more general conclusion of this paper as special cases.

关键词：量子力学循环准则氢原子电离

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清火消痈汤治疗心肝火旺及热毒内蕴型肺痈临床观察

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中国中医药现代远程教育 2024年第21期22卷 135-137页

作者：潘延成滕州市中心人民医院药学部山东滕州277599

目的研究清火消痈汤治疗心肝火旺及热毒内蕴型肺痈的临床价值。方法以2021.1.—2021.1.月为研究周期,抽取研究对象72例,采用随机数字表法分为研究组、对照组,各36例;对照组予西药治疗,研究组予清火消痈汤治疗,对比两组呼吸功能指标... 详细信息

目的研究清火消痈汤治疗心肝火旺及热毒内蕴型肺痈的临床价值。方法以2021.1.—2021.1.月为研究周期,抽取研究对象72例,采用随机数字表法分为研究组、对照组,各36例;对照组予西药治疗,研究组予清火消痈汤治疗,对比两组呼吸功能指标和中医证候积分。结果治疗后,研究组二氧化碳分压(PaCO_(2))水平为(41.42±3.75)mm Hg(1.mm Hg≈0.1.3 kPa),低于对照组的(47.59±5.88)mm Hg(P1.)分、总积分为(3.1.±0.64)分,均低于对照组的(5.29±1.05)分、(1.89±0.62)分、(7.28±1.75)分(P<0.05)。结论清火消痈汤治疗肺痈效果显著。

关键词：清火消痈汤肺痈支气管扩张心肝火旺证热毒内蕴证中医药疗法

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