燃气轮机叶片冷却技术的发展

综述了近年来重型燃机透平冷却结构、冷却剂、涂层和材料、新技术等在冷却技术中的发展,分析发现通过改进这些因素能逐步满足日益增长的透平进口温度要求,同时阐述了目前透平冷却技术中各种方法对流动和换热的影响,各种因素综合考虑将是今后工作的重点。     

三菱M701F燃机透平冷却系统典型故障分析及处理

介绍了M701F燃机透平冷却系统技术要求,总结了冷却系统典型故障对机组运行的影响并提出了相应的对策措施。同时,研究了透平冷却空气对燃气轮机的影响机理,对机组的安全运行及维护具有重要借鉴意义。     

透平发电机组进气冷却提升发电量方案设计

燃气轮机以其体积小、启动速度快等优点,被认为是最适合用于调峰的机组,但在夏季用电高峰时段,因温度较高导致机组出力下降,调峰能力大大削弱。由于天然气透平燃机压气机是定容设备,随着环境大气温度升高,压气机进气在容积流量不变的情况下,质量流量大大降低,燃机燃料消耗量减小,燃机透平工质相应减少,燃机最大出力有着明显的降低。环境温度每升高1℃最大可导致燃气轮机额定发电能力下降1%。燃气轮机出力随环境温度升高而下降,针对天然气透平燃机进气系统冷却改造,采用溴化锂制冷机组制出7℃的冷冻水,冷冻水通过冷冻水泵输送至燃气轮机进气口处的表冷器,冷冻水将燃机入口处空气冷却后升温至12℃再回流至溴化锂制冷机组循环制冷,以降低透平燃机入口空气温度,将燃机入口空气冷却至ISO工况（15℃进气工况）,可提升燃机出力,增加透平发电机组的发电量,极大地挖掘设备潜力,弥补企业用电缺口,对企业的节能减排和经济效益有着重大的意义。     

天然气透平膨胀发电技术在燃机电厂的应用

介绍了透平膨胀机的工作原理及其在天然气压力能回收方面的巨大应用前景，并以大唐肇庆燃机电厂的发电方案为例，阐明天然气透平膨胀发电技术在燃机电厂应用具有良好的经济效益和社会效益，对其他燃机电厂的升级改造有良好的借鉴意义。     

透平叶片结构设计与振动特性网格无关性研究

振动损坏是透平转子叶片最主要失效模式之一,其失效关系到整台机组的工作可靠性。为保证全寿命周期内工作安全可靠,在设计阶段需要对透平转子叶片进行详细振动分析,采用有限元法对叶片进行频率分析时,由于叶片网格划分密度的差别,可能对振动特性计算结果造成较大影响。本文根据某型燃机气动设计情况,进行了透平转子叶片结构设计,完成结构设计后,进一步基于ANSYS进行了振动特性分析,通过研究网格密度对叶片振动频率的影响,探究了对该榫接式叶片频率计算结果无影响的合理网格密度,指导后续同类机组透平叶片设计。     

浅析沿海地区9F燃机电厂电气设施设计特点

沿海地区由于特殊的地理位置,温度和相对湿度影响盐雾的腐蚀浸染。浅析沿海地区9F燃机电厂电气设施设计依据特殊的作业环境需要,与普通的火电厂电气设计特点存在明显差异。本文从9F燃机电厂电气主接线特点入手,研究了发电机出口、励磁电源接线、启动电源的设置及接线;第二部分研究了9F燃机电厂电气设施发电机选型特点以及主变选型和容量选择特点。     

典型燃机透平转子旋转盘结构的流动换热研究

针对实际F级燃机典型结构的透平转子旋转盘进行了流热耦合的数值模拟研究,研究其流场特性参数;根据流场模拟结果对中心进气的涡轮盘与中间盘复杂流动的换热特性进行研究计算,对实际工程应用具有一定的参考价值。     

浅谈M701F3燃机T级检修

燃机检修共分为C检、T检和M检。其中,T检是对燃机的燃烧室和透平缸部分进行检修,包括内筒、尾筒的更换,喷嘴喷水试验,开放透平缸上半,更换动静叶片,测量动叶的叶顶间隙以及测量压气机可导向叶片IGV全开、全关的角度等。     

定向结晶材料燃机透平叶片强度有限元分析

以某型燃机透平叶片为研究对象,建立了以六面体网格为主体的有限元模型,进行了叶片的温度场模拟.并以此为基础,综合考虑了模型的材料非线性和几何非线性,完成了透平叶片的有限元强度计算,得到了叶片在离心力载荷和热载荷共同作用下的应力分布.经过对结果进行分析,证明该叶片在正常工作状态下是安全的.     

基于SIS的叶片通道温度分析系统研究

简要介绍了M701F型燃机燃烧器的结构和燃烧监视情况,分析了原有燃烧监视的不足,提出了基于SIS平台的燃机叶片通道温度在线监视方式,为实时分析燃机燃烧情况提供了有效的手段,提高了机组运行的安全性.     

轴向排气型煤气透平的轴承温度稳定控制方法及应用

简要分析了径向进气、轴向排气型煤气透平膨胀机的排气侧轴承温度增高的原因,如何避免煤气透平膨胀机排气侧支撑轴承温度的升高,对保证TRT机组的正常运行非常重要。通过该文提出的控制透平排气侧轴承温度升高的方法,使TRT机组自动化系统的控制功能更加完善。     

A non-destructive method to assess condition of gas turbine blades,based on the analysis of blade-surface images

There is a non-destructive method to assess condition of gas turbine blades in the article presented. The method is based on the processing of blade-surface images in visible band of the electromagnetic wave. Presented are also the results of research into the influence of high-temperature loads on blades of a gas turbine. The relations are shown between the temperature of heat treatment of the blades and a change in colour of blade surfaces as well as changes in the microstructure of the blade material. These relations are suitable for the assessment of changes in the microstructure, which result from the supercritical temperature of the working medium affecting the blade. The method can prove useful for the in-service assessment of the blade material’s overheating level.     

Performance test and component characteristics evaluation of a micro gas turbine

This study aims to analyze engine performance and component characteristics of a micro gas turbine based on detailed measurement of various parameters. A test facility to measure performance of a micro gas turbine was set up and performance parameters such as turbine exit temperature, exhaust gas temperature, engine inlet temperature, compressor discharge pressure and temperature, and fuel and air flow rates were measured. The net gas turbine performance (power and efficiency based on the gas turbine shaft end) was isolated and analyzed. With the aid of measurement based simulation, component characteristic parameters such as turbine inlet temperature, compressor efficiency, turbine efficiency and recuperator effectiveness were estimated. Behaviors of the estimated characteristic parameters with operating condition change were examined and sensitivities of estimated parameters to the measured parameters were analyzed.     

Robust control of speed and temperature in a power plant gas turbine

In this paper, an H(∞) robust controller has been designed for an identified model of MONTAZER GHAEM power plant gas turbine (GE9001E). In design phase, a linear model (ARX model) which is obtained using real data has been applied. Since the turbine has been used in a combined cycle power plant, its speed and also the exhaust gas temperature should be adjusted simultaneously by controlling fuel signals and compressor inlet guide vane (IGV) position. Considering the limitations on the system inputs, the aim of the control is to maintain the turbine speed and the exhaust gas temperature within desired interval under uncertainties and load demand disturbances. Simulation results of applying the proposed robust controller on the nonlinear model of the system (NARX model), fairly fulfilled the predefined aims. Simulations also show the improvement in the performance compared to MPC and PID controllers for the same conditions.     

针对脉冲发电机突变负载的微型燃气轮机工作性能研究

为分析有动力涡轮的微型燃气轮机在带动脉冲发电机中的性能,建立带动力涡轮的微型燃气轮机数学模型.因有动力涡轮的微型燃机是由动力涡轮驱动负载,其负载变化对燃机核心机影响不大,但为了使动力段转速恢复稳定而采用的改变供油量方法会对核心机产生很大影响.基于所建立的微型燃气轮机数学模型对其进行仿真计算,研究了该燃机设计点性能参数、...     

Parametric simulation and performance analysis of a solar gas turbine power plant from thermodynamic and exergy perspectives

Using solar energy in gas turbine cycles is a new method that can improves the efficiency of gas turbines. Placing a solar receiver before a combustion chamber can raise the temperature of the air coming into the chamber and reduce the consumption of fuel in the chamber. The system that combines a solar energy receiver with a gas turbine cycle is technically called a “solar gas turbine”. The goal of this paper is the parametric simulation and performance analysis of a gas turbine cycle equipped with a solar receiver from thermodynamic and exergy aspects of view. The selected parameters in this study, include the pressure ratio of compressor, the temperature of gases at the turbine inlet and the direct normal irradiance. The obtained results indicate that the fuel consumption of this combined system is reduced by using a solar receiver and the temperature of gases entering the combustion chamber increased. The reduction of consumed fuel, in turn, reduces the rate of exergy destruction in the combustion chamber. Another important point is that the solar receiver itself has the least amount of exergy destruction. The net power generated by a solar gas turbine cycle is 10 % higher than that produced by a simple gas turbine cycle. Also, the studies show that the electrical efficiency of a solar gas turbine cycle is about 41 % higher than the simple gas turbine cycle.

     

基于整机瞬态热应力场重型燃气轮机转子的寿命评估

针对某F级重型燃气轮机,根据机组的实际运行监测数据,提取得到该机组在冷态启动、热态启动两种工况下各测点温度随时间的变化曲线,分析得到转子各处的换热边界条件,采用有限元方法计算该燃气轮机转子在不同启动工况下的整机瞬态温度场及应力场,并基于该瞬态热应力分析结果对转子的低周疲劳寿命损耗进行评估。计算结果表明：最大热弹性应力值一般都出现在透平第一级轮盘的出气侧底部圆角处及压气机后三级轮盘的中间部位的圆角区域;气流参数变化的快慢对转子应力分布影响极大;冷态启动一次的寿命损耗最高达0.02%,大于热态启动的对应值。研究结果为轮盘结构设计与机组运行规程的优化提供了重要参考。     

高压燃气涡轮叶栅热辐射特性研究

采用商用软件CFX11.0的不同湍流模型对NASA-Markll高压燃气气冷涡轮叶栅进行气热耦合换热计算,得出最佳湍流模型。针对不同涡轮叶栅前进口总温进行考虑和不考虑热辐射的数值计算,着重分析叶栅流道内热辐射效应随涡轮前入口温度的变化情况,得出在实际的高温高压气冷涡轮叶栅耦合换热计算时,辐射热流应当作为源项加入到方程中。这样能够更准确地得出叶片内部温度分布,为热应力计算以及寿命预估提供准确的边界条件。     

三菱M701F型燃气轮机控制系统分析

Mitsubishi公司的M701F型燃气轮机是从国外引进的大型燃气轮机机组;其控制系统采用Mitsubishi公司自身开发的Diasys Netmation,该文主要分析M701F型燃气轮机的控制系统,特别对燃气轮机的温度控制系统进行了详细分析.     

Measurements of the Instantaneous Temperature Values of Gas Turbine Engine Gases Using Acoustic Multivibrators

Instruments and Experimental Techniques - A differential device has been developed for measuring the temperature in the control channel of a gas turbine engine (GTE), where the nonuniformity of...