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Journal of Thermal Science 2000年第3期9卷 276-281页

作者： Min QIAN Arnaud BOELLE Philippe JAUD ( Electricite de France division R&D, 6 quai Watier B.P.49 78401 Chatou, France ) Yongjie NA Qinggang LU Shaolin BAO ding CUI Weihong JIAO Huanming ZHAO (Institute of Engineering thermophysics, Chinese Academ Electricité de France division R&D Chatou France Institute of Engineering thermophysics Chinese Academy of Sciences Beijing China

The size distribution of coal particles in a Circulating Fluidized Bed (CFB) boiler plays a crucial role in the complicated combustion, heat exchange and pollutant emissions in such a plat. Therefore, it is fundamental to study the different factors having influence on the size distribution of coal particles. Above all, the coal itself and in particular, the coal combination phenomenon is a very influent factor. In the frame of this work, the coal nature (elementary composition) and coal internal structure (mineral components) are studied in detail. At this intermediary stage, experiments on three typical Chinese coals on a l.5 MWt CFBC pilot plant have been made. Some primary fragmentation tests have also been made in a small lab scale fluidized bed reactor. The results from the hot pilot test show i) the variation of coal ash distributions and other CFB performance data due to the cyclone and the coal characteristics and ii) the variation of desulfurization efficiency with limestone. Whereas the bench scale primary fragmentation test, likely linked to the caking propriety of a coal, does not seem to change considerably the char size distribution.

关键词： drculating nuidized bed coal characterization ash formation size distribution pollutant emissions.

Supercritical CO_2: Properties and Technological Applications-A Review

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Journal of Thermal Science 2019年第3期28卷 394-430页

作者： NIKOLAI Polikhronidi RABIYAT Batyrova ASLAN Aliev ILMUTDIN Abdulagatov Thermodynamics of Fluids and Critical Phenomena Institute of Physics of the Dagestan Scientific Center of the Russian Academy of Sciences Mountain Botanical Garden of the Dagestan Scientific Center of the Russian Academy of Sciences thermophysics division Geothermal Research Institute of the Russian Academy of Sciences Physical Chemistry Department Dagestan State University

The main goal of the present paper is to assess the available information so as to obtain a general procedure for dealing with the critical enhancement of the thermodynamic and transport properties of supercritical CO_2 and CO_2 containing binary mixtures for practical and scientific applications. The present review provides comprehensive analysis of the thermodynamic and transport properties of supercritical carbon dioxide and CO_2 containing binary mixtures(experiment and theory) and their various technological and scientific applications in different natural and industrial processes. The available information for the thermodynamic and transport properties(experiment and theory) enhancement(anomaly) of supercritical carbon dioxide and SC CO_2 + solute mixtures is comprehensively reviewed. The effect of long-range order parameter fluctuations on the thermodynamic and transport properties of supercritical fluids(SC CO_2) will be discussed. Simplified scaling type equation based on mode-coupling theory of critical dynamics with two critical amplitudes and one cutoff wave number as fluid-specific parameters was used to accurately predict of the transport properties of supercritical carbon dioxide. The recommended values of the specific parameters(asymptotic critical amplitudes) of the carbon dioxide for practical(prediction of the thermodynamic and transport properties of the supercritical CO_2 for technological applications) and scientific use were provided. The role of the critical line shapes of the carbon dioxide containing binary mixture(SC CO_2+solvent) in determination of the critical behavior of the mixture near the critical point of pure supercritical solvent(CO_2) is discussed. Krichevskii parameter concept for a description of thermodynamic behavior of dilute near-critical SC CO_2+solute mixtures is also discussed. The structural and thermodynamic properties of the carbon dioxide containing binary mixtures near the critical point of pure solvent(CO_2) are d

关键词： carbon dioxide critical point equation of state supercritical fluid thermodynamic properties transport properties

Recent progress in study of singular perturbation problems

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Journal of Shanghai University(English Edition) 2009年第1期13卷 1-5页

作者：莫嘉琪倪明康 Department of Mathematics Anhui Normal University division of Computational Science E-Institutes of Shanghai UniversitiesShanghai Jiaotong University Department of Mathematics East China Normal University

Some results for the singular perturbation theory, methods and applications in the new century are reviewed in this paper. It could be found that in the recent decade, many approximate methods have been developed and refined, including the method of averaging, boundary layer methods, methods of matched asymptotic expansion and methods of multiple scales. An overview is given on the new work about various problems, such as the reaction diffusion, turning points, boundary layers, shock waves, stability problem, solitons, attractors, canard solution, scattering light wave and neuron network, etc. And then, a great number of applied problems are solved in applied mathematics, computational mathematics, fluid mechanics, elastic mechanics, optics, thermophysics, quantum mechanics, plasm physics, physical chemistry, analytical chemistry, epidemiology, neurology, engineering science, environment science, bionomics, atmosphere physics, ocean climate, aeronautics and astrnatics and so on, from which only some examples are extracted and described in this review.

关键词： singular perturbation differential equations boundary value problem

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基于飞秒激光的一维速度场测量方法

工程热物理学报 2022年第1期43卷 267-271页

作者：韩磊高强李博张大源白雪松天津大学内燃机国家重点实验室天津300350 division of Fluid Mechanics of Lund University Lund S22100Sweden

飞秒激光诱导氰基化学发光利用飞秒光丝标记流场中的气体分子,通过观测被标记分子在固定时间内的位移可获得流场的速度信息。一维的光丝在实验结果中包含了一维的速度场信息,但由于无法将光丝移动前后的位置信息精确关联,因此只能给出... 详细信息

飞秒激光诱导氰基化学发光利用飞秒光丝标记流场中的气体分子,通过观测被标记分子在固定时间内的位移可获得流场的速度信息。一维的光丝在实验结果中包含了一维的速度场信息,但由于无法将光丝移动前后的位置信息精确关联,因此只能给出中心一点的速度。针对此问题,我们提出了一种一维速度场反演算法,可根据移动后光丝的位置及其线型反演出整条光丝位置处的速度,得到光丝上1D-2C的速度场信息。利用多条发光线的移动轨迹,还可获得二维速度场信息。

关键词：飞秒激光成丝速度场一维测量

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非预混旋流火焰中部熄火及重新稳燃机理研究

工程热物理学报 2021年第12期42卷 3312-3319页

作者：俞森彬刘潇郑洪涛 A.M.Elbaz division of Fluid Mechanics Lund UniversitySweden 22100 哈尔滨工程大学动力与能源工程学院哈尔滨150001 Clean Combustion Research Center King Abdullah University of Science and TechnologySaudi Arabia 999088

本文利用5kHz同步PIV/OH-PLIF实验装置,结合大涡模拟(LES)耦合PDF燃烧模型,系统研究燃料中心喷射下非预混旋流火焰中部熄火及再次稳燃机理,对比了两种旋流器出口结构的影响。结果表明,LES-PDF模型可以准确地捕捉到旋流流场分布及火焰形... 详细信息

本文利用5kHz同步PIV/OH-PLIF实验装置,结合大涡模拟(LES)耦合PDF燃烧模型,系统研究燃料中心喷射下非预混旋流火焰中部熄火及再次稳燃机理,对比了两种旋流器出口结构的影响。结果表明,LES-PDF模型可以准确地捕捉到旋流流场分布及火焰形态,包括中部熄火及火焰重新稳定。相比于直燃道的结构,扩张燃道的存在引导了更宽的回流区,改善了中部熄火现象,两种结构对其下游的主火焰再次稳燃高度影响不大。中央燃气射流带来的高标量耗散率使得热损失变大,从而引起中部熄火。同时进一步促进了CH_(4)与空气的预先混合及部分反应前置物(CH_(2)O),为非预混旋流火焰在下游重新稳燃提供了有利条件。通过对火焰再次稳燃处OH反应项及扩散项的分析,发现反应项占据主导地位,部分预混火焰传播为再次稳燃的主要机理。

关键词： LES-PDF 旋流火焰中部熄火火焰稳燃反应前锋

Interfacial jump conditions of the phase-change with thermal wave effect

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Progress in Natural Science:Materials International 1998年第4期 3-5页

作者：卢文强 Beijing 100039 Chinese Academy of Sciences Department of Physics division of Thermal Science Graduate School at Beijing P.O. Box 3908 University of Science and Technology of China

By virtue of the theory of two-phase flow and thermophysics, the jump conditions of mass, momentum and energy at phase-change moving interface as well as the interfacial jump conditions of the phase-change with thermal wave effect are deduced. The non-dimensional forms of the jump conditions and some new non-dimensional pa rameters are obtained.

关键词： phase-change thermal wave effect interfacial conditions non-dimensional parameters.