磁流体燃煤燃烧室强旋流流场的消旋试验研究

对燃煤燃烧室二级消旋的方式进行了冷模试验，并将冷模试验结果用于了热态试验装置。冷模试验装置是针对ＪＳ－Ⅱ型燃煤燃烧室设计的，它利用了在燃烧室第二级进口处布置的８个二级氧进口小喷嘴。小喷嘴出口方向正好与二级进口气流旋转方向相反，高速反旋转的氧气喷入二级燃烧室。一方面有利于混合，同时对主气流起到强度的消旋作用。冷模试验表明，影响二级燃烧室出口气流旋流度的因素有多种，如一、二级气流的流量比、二级氧的喷     

燃煤流体发电通道的电流归并电路

电流归并系统的功能是将磁流体发电的法拉第通道或斜接通道功率取出区的多对电极电流输出归并为单对输出，然后，可以只用一个主逆器将归并后的直流功率转换成交流并接入常规电网。燃煤磁流体发电机电流归并电路的试验成功是发展先进能量转换系统和实用归并方法的重要一步。     

烧煤磁流体发电技术发展前景展望

概述了烧煤磁流体发电在高效率火力发电技术中所处的位置，分析了传统技术路线的困难，阐明了采用集成热化学转换器的新技术路线的特点。     

磁流体的热力学特性和应用

介绍了磁流体的组成及其所具有的温度、磁热效应，热磙对流和蒸发等热物理性能，以及磁流体膜在强化传热和减小流阻的作用，并详述了磙流体在热力学领域的具体应用，如热管、磁热泵、太阳能系统等，以此来拓宽对磁流体热应用方面的研究和应用思路。     

关于磁流体发电的前景分析及对策思考

分析了磁流体发电的前景并提出了研究工作对策，指出：磁流体发电虽然遇到了较大的困难，它仍是一种有高效低污染发电新技术，有可能在今后的大容量燃煤发电中发挥重要作用。     

钾长石中钾的加压浸取方法

研究了消石灰和钾长石的加压反应条件，获得９０％或更高的提取率。测得浸取反应级数为１．５级，活化能为４５．５ＫＪ／ｍｏｌ。比较了正长石型和微斜长石型两种典型钾长石的预处理条件，指明了浸取残渣的利用途径。     

磁流体(MHD)发电通道绝缘材料的新发展

本文综述近几年来磁流体(MHD)发电通道绝缘材料的新发展,在燃油MHD发电通道中,MgO,Al_2O_3等氧化物材料仍作为半热壁和热壁通道绝缘材料继续探讨。在燃煤MHD发电通道中,塞龙Sialon,氮化硼,氧化铝,碳化硅等正作为冷壁通道绝缘材料开发研究。研究结果表明,MHD发电通道绝缘材料正由单一材料向复合材料的方向发展。     

民用航空发动机燃烧室噪声预测

民用航空发动机燃烧室作为飞机的主要噪声源,其噪声大小不仅影响飞机适航取证,而且反映燃烧室的燃烧品质。因此,在设计之初对发动机燃烧室噪声进行精准预测便显得极为重要。通过对民用航空发动机燃烧室在地面和空中的噪声产生机理和主要影响因素进行研究,根据研究结果结合MATLAB GUI进行编程,建立民用航空发动机燃烧室噪声预测模型。利用该模型预测发动机燃烧室的声压级、总声压级、A计权声压级和感觉噪声级等噪声参数。     

Effect of Fatigue on Proof Strength of Gas Turbine Combustor Casing

The objective of an aero-engine combustor structural design is primarily to provide the engine combustor with sufficient fatigue life and strength to permit its continuous operation until a scheduled engine overhaul and to withstand certain overload. During the service, combustor is subjected to cyclic pressure which may affect its overpressure capability. The combustor casing is considered as one of the critical parts in the engine. In this paper, the proof pressure capability of a combustor casing subjected to fatigue loading is evaluated. The effects of the fatigue damage on the proof pressure capability of the combustor casing are also established. During the testing of the casing, the pressure was continuously increased to evaluate the over pressure capability of the casing. The results of this experimental study on the casing of an aero-engine combustor are presented in this paper. A detailed post-fracture investigation of the fracture surfaces of the casing showed that two independent cracks, i.e., one along the circumference of the casing towards the front flange and the other one along the axial direction were developed. Further a detailed investigation of the fractured surface under stereo zoom microscope and scanning electron microscope showed that the presence of striations coupled with dimples indicated that the failure was initiated due to fatigue loading.     

“十三五”燃煤发电设计技术发展方向分析

通过对中国政策法规和《电力发展"十三五"规划》的研究,对中国燃煤发电设计技术的未来发展走向进行分析,提出了洁净煤发电技术仍将是"十三五"燃煤发电机组技术发展的核心,同时应努力开展低碳燃煤发电技术的研发。结论是"十三五"期间更高参数超超临界燃煤发电技术、燃劣质煤"超低排放"改造技术、火电灵活性改造技术、节能改造技术、深度节水技术以及大型燃煤锅炉生物质混烧技术将有一定的发展空间,进而对相关技术研究重点提出了建议。     

Multi-disciplinary design optimization of a combustor

A technique for design optimization of a combustor is presented. This technique entails the use of computational fluid dynamics (CFD) and mathematical optimization to minimize the combustor exit temperature profile. The empirical and semi-empirical correlations commonly used for optimizing combustor exit temperature profile do not guarantee optimum. As an experimental approach is time consuming and costly, use is made of numerical techniques. However, using CFD without mathematical optimization on a trial and error basis does not guarantee optimal solutions. A better approach, which is often viewed as too expensive, is a combination of the two approaches, thus incorporating the influence of the variables automatically. In this study the combustor exit temperature profile is optimized. The optimum (uniform) combustor exit temperature profile mainly depends on the geometric parameters. Combustor parameters have been used as optimization variables. The combustor investigated is an experimental liquid-fuelled atmospheric combustor with a turbulent diffusion flame. The CFD simulations use the Fluent code with a standard k–? model. The optimization is carried out using the Dynamic-Q algorithm, which is specifically designed to handle constrained problems where the objective and constraint functions are expensive to evaluate. The optimization leads to a more uniform combustor exit temperature profile compared with the original.     

燃煤电厂烟气中Hg的生成、治理、测试及排放特征研究

燃煤电厂是大气Hg排放的主要来源之一，基于文献调研，分析了燃煤电厂烟气中Hg的来源及生成、燃烧后现有设备协同脱Hg技术和吸附剂喷射脱Hg技术、主要离线测试方法、超低排放实施前后燃煤电厂烟气Hg排放特征等，指出燃煤电厂实施更严格的烟气Hg排放控制是非常有必要的，且改性活性炭、改性飞灰喷射脱Hg技术将是未来应对更严格Hg排放限值的主流技术。研究结果可为燃煤电厂烟气Hg排放控制提供参考。     

基于硅材料的微型气体涡轮机中微型燃烧器的设计和加工

由微型燃烧器、微型压缩机和涡轮组成的微型气体涡轮发动机有望成为微机电系统的能源系统.阐述了一种微型燃烧器的设计和加工.设计时力图增加流路的长度,其目的是减少微型燃烧腔的热损失和有效地对燃料和空气进行预热.该微型燃烧器由7片厚度不同的单晶硅片组成,通过ICP DRIE干刻蚀加工而成.组装后的微燃烧器的样件尺寸为21.5 mm×21.5 mm×4.4 mm,已成功地进行了氢气燃烧实验和测试.该微型燃烧器和转子组合后可以应用于微型气体涡轮发动机,与压电元件组合后可用于微型发电机.     

Diode laser absorption spectroscopy of water vapor in a scramjet combustor

A sensor based on tunable diode laser absorption spectroscopy was constructed for time-resolved temperature and water vapor concentration measurements in a scramjet combustor. The sensor probed two absorption lines near 1390 nm with two time-multiplexed lasers used to measure temperature and water vapor concentration at up to 20 kHz. A demonstration experiment was performed in the supersonic, expanding exhaust region of the combustor, showing the measurement to be repeatable, able to resolve temporal trends during tunnel operation, and sensitive to changes in combustor operating conditions.     

燃煤发电系统能源高效清洁利用的基础研究综述

能源在现代社会经济发展中的作用日益显著,我国的资源特性决定了燃煤发电将长期在我国能源体系中占据主导地位。大容量、高参数的燃煤发电系统是实现煤炭能源高效清洁利用最可行的技术途径之一,是确保国家电力供应的最主要方式。针对我国燃煤发电系统在能源结构变化及参数提高背景下面临的理论和技术双重需求,总结了高参数燃煤发电机组在关键单元、过程和系统耦合方面高效、清洁运行的新理论和新方法的研究进展,使燃煤发电机组能够在高效热功转换的同时实现污染物超低排放。     

Failure analysis of an aero-engine combustor liner

The paper presents a failure case of an aero-engine combustor liner. Macroscopic and microscopic observations, microstructure investigation, chemical analysis and hardness measurement have been performed to investigate the damage mechanism and failure causes of notches and cracks. The results show that the failure modes of notches, axial-direction crack along the combustor liner and crack at the edge of welding spot are respectively attributed to high-temperature ablation, mixed crack of ablation and thermal fatigue crack. The bad configuration of crossover tube is the main reason for the failure of combustor liner.