适用于燃煤气的STIG循环中湿燃气的状态方程

将燃煤气的ＳＴＩＧ循环中湿燃气当作实际气体处理,利用两项维里方程的对比态形式,建立了温燃气的状态方程,用此状态方程及余函数修正法计算了湿燃气的热力性质,并与按理想气体计算的湿燃气的热力性质进行了比较。     

燃气热力性质计算研究

通过详细对比目前国内普遍采用的燃气轮机工质燃气热力性质计算方法与基础数据，分析现有计算方法与基础数据的准确性和存在的误差，确定了新的燃气轮机工质燃气热力性质计算用方法与基础数据，该基础数据包括11种主要的组成燃气的单质成分，计算温度范围从200K到3200K。该基础数据与国际权威机构发布的数据对比，误差在很小的范围内，其计算精度达到足够的工程实用要求，并开发了相应的整套燃气热力性质计算子程序。     

注蒸汽燃气轮机循环工质热力性质研究

本文对注蒸汽燃气轮机循环中的工质,首先建立了燃气—蒸汽混合物(以下简称湿燃气)的理想模型;据此确立了湿燃气热力性质计算的二次线性插值方法。采用该方法,编制了供工程实用的湿燃气热力性质表及与之配合使用的理想水蒸汽表。     

PG9171E型燃气轮机变工况计算模型的建立

为了建立PG9171E型燃气轮机变工况计算模型,必须根据电厂提供的原始数据建立该机型的压气机特性.由于现有基线估算方法的建立未包含高压比压气机实验数据.故一般只被应用于压比小于11的压气机特性估算,而PG9171E型燃气轮机的压气机压比已接近12.为了解决这个问题,在压气机特性计算过程中首次提出分段计算法,计算结果表明:该方法的精度能够满足实际应用要求.在变工况计算模型的燃气热力性质计算方面,根据热力性质表[2].归纳出空气、CH2燃气、C燃气和水蒸气的热力性质通用关系式,简化了燃烧室燃用重油时的湿燃气焓值和对数压比值的计算过程,变工况计算模型的计算结果与燃气轮机实测参数进行比较,表明上述改进方法在实际应用中能够满足建模精度的要求.     

水蒸气与燃气热工参数电算的几种数学模型

本文介绍了热能系统分析与优化程序系统的几个桩模块一水蒸气与燃气热工参数计算模型。利用本文介绍的几种模型，可建立满足不同精度要求的水蒸气与燃气热力参数计算的通用程序。     

工质加湿对燃气透平性能的影响分析

对高温高湿燃气的热物性进行了计算分析,认为注湿后的燃气随着含湿量的增加,气体的热物性会随之发生变化;在此基础上建立了燃气透平的性能计算模型;利用此模型,在给定透平几何尺寸以及初参数的情况下,计算了透平在不同加湿时,一些相关性能参数的变化情况,得到一些有意义的结论,为注湿类循环更深入的定量研究提供了帮助。图6参6     

江苏省燃气热力协会成立

江苏省燃气势力协会于2004年12月24日在南京成立。2004年12月23日，召开了江苏省燃气协会第四届第三次理事会兼江苏省燃气热力协会筹备理事会，会议由江苏省燃气协会理事长念国主持。     

大型燃气-蒸汽联合循环机组热力性能试验分析

阐述了国内第一套300MW燃气-蒸汽联合循环机组热力性能考核试验步骤，对试验数据进行了处理和分析，计算了机组的试验输出功率与热耗率，研究表明得出的结果准确可信。通过该实例的总结分析与相应试验的理论研究提出了大型引进型联合循环机组热力性能考核试验值得注意的技术要点。     

工质加湿后简单燃气涡轮循环的动态响应

在传统燃气轮机循环的动态仿真研究中，对涡轮部件的处理一般都采用涡轮特性图或曲线的方法来完成；但如果进入涡轮的工质发生变化，由纯燃气变成高温高压高湿的燃气，那么涡轮特性图或曲线在无法获得的情况下要建立湿工质循环的动态仿真模型，对涡轮部件需作特殊处理。本文根据涡轮的工作原理建立了基于逐级计算的涡轮部件性能仿真模块：利用此涡轮模块，搭建完成了发电用简单燃气轮机循环动态仿真模型，同时燃烧室考虑注湿，计算在不同注湿情况下涡轮部件的性能变化以及整个循环的动态响应过程。     

生物废料燃气热力联产技术

介绍了生物质废料燃气热力联产装置的工艺流程，探讨了流化床热解炉床料的选择，从生物质气化反应与操作温度的关系，以及防止烧结现象的产生出发，得出以Ｆｅ２Ｏ３为床料，操作温度为８５０℃左右，以燃气作为流化介质，可保证流化床热解炉获得高热值、高转化率的燃气。     

A study of spontaneous combustion characteristics of a turkish lignite: particle size, moisture of coal, humidity of air

This study evaluated the spontaneous combustion characteristics of Askale lignite from Turkey. The effect of the gas flow rate, the moisture of the piles of coal, the humidity of the air and particle size on the spontaneous combustion characteristics of coal samples were examined using Crossing Point Methods adapted to our laboratories conditions. The amounts of three predominant oxygen functional groups (carboxyl, hydroxyl and carbonyl) in untreated and moist coal samples were also determined with wet chemical methods. The amounts of oxygen functional groups in moist coal samples do not differ significantly from that of untreated coal. The liability of spontaneous combustion of this lignite was increased with decreasing particle size, increasing moisture content of the coal and decreasing humidity of the air.     

发动机均质压缩燃烧单区模拟模型及其应用

介绍一种基于燃料氧化反应动力学计算的单区模型,该模型由一维空间的质量守恒方程、动量守恒方程、能量守恒方程和气体状态方程等气相化学反应动力学控制方程所组成。采用该模型并利用二甲醚氧化的详细化学反应动力学机理,对二甲醚燃料在柴油机上的均质压缩燃烧HCCI进行了模拟计算和试验研究。计算结果与试验结果比较表明,该模型对HCCI燃烧的着火始点预测很好。     

Evaluation of srk equation of state in calculating the thermophysical properties of gas turbine combustion gases

The purpose of this work is to evaluate the thermophysical properties of combustion gases of the gas turbine engine using the Soave-Redlich-Kwong equation of state and to compare the results with those obtained from the virial equation of state and the experimental values obtained from experiment and the generalized charts. The properties which have been considered in this work were, density, specific heat at constant pressure, enthalpy, entropy, viscosity and thermal conductivity. The temperature range was (200–2600 K) theoretically, while the pressure range was (3–12 atmospheres). The Soave-Redlich-Kwong (SRK) equation of state generally predicted better values for thermophysical properties than those predicted by the virial equation of state. A computer program, to evaluate the departure of thermophysical properties using virial and SRK equations of state, was used.     

低浓度瓦斯脉动燃烧过程的数值模拟

选取k-ε湍流双方程模型、概率密度方程(PDF)湍流燃烧模型及部分预混燃烧模型,利用流体分析软件Fluent对煤矿低浓度瓦斯在Helmholtz型脉动燃烧器中的燃烧过程进行了数值模拟。通过对燃烧室内低浓度瓦斯脉动燃烧压力场和速度场的分布进行模拟研究,并与理论燃烧过程相比较,其结果表明:低浓度瓦斯脉动燃烧数值模拟结果符合实际脉动燃烧规律,说明脉动燃烧这一燃烧方式适合低浓度瓦斯的研究利用,并为以后的研究提供参考。     

Wave motion and heat and mass transfer of the disperse phase under the conditions of low-frequency gas pulsations

The article presents a system of equations of nonstationary wave motion of the disperse phase in a binary vapour–gas medium with account for the heat and mass transfer processes. The effect of pulsations of moist air and superheated steam on motion of gas suspension and rate of heat and mass transfer under the conditions of wave and resonance modes has been investigated in the course of the computational experiment. In particular, it is shown that in the range of the parameters studied gas pulsations lead to enhancement of interphase heat and mass transfer. Use of superheated vapour as a carrying phase results in heat and mass transfer enhancement compared with moist air. An analytical expression has been obtained for determining the frequency of gas velocity oscillations in a low-frequency region, at which maximum intensity of heat transfer is attained. A schematic of the pneumatic setup equipped with the chamber of pulse combustion with an aerodynamic valve is presented.     

A thermodynamics model for the compression and expansion process during the engine’s motoring and a new method for the determination of TDC with simulation technique

In this paper, a thermodynamics model describes the pressure change during the motoring process of the internal combustion engine was given based on the mass conservation, energy conservation law and the state equation of perfect gas. The factors that affect the maximal pressure point position relative to the minimal volume point (top dead center) were analysed with the thermodynamics model. The one to one correspondence between the geometrical characteristics of the pressure diagram and the maximum pressure point position relative to the top dead center (TDC) was proven. Based on the model described, a new method for the determination of the TDC of the internal combustion engine was given. The simulation and experimental results indicate that the new method could determine the top dead center with an error smaller than 0.05 crank angle.     

Simulation of the combustion process for a CI hydrogen engine in an argon-oxygen atmosphere

Hydrogen combustion in a noble gas atmosphere increases the combustion chamber temperature, and the high specific heat ratio of the gas increases the thermal efficiency. In this study, nitrogen was replaced by argon as the intake air along with pure oxygen to supply the engine. The objectives of this study are to determine the effects of different engine parameters on combustion and to analyse the emissions from hydrogen combustion in an argon-oxygen atmosphere. This research was conducted through simulations using CONVERGE 2.2.0 software, and the YANMAR engine NF19SK model was used to determine the basic parameters. Changing the injector location affects the pressure and temperature in the combustion chamber. With increasing compression ratio, the pressure increases more rapidly than the temperature. However, combustion at high compression ratios decreases the maximum heat release rate and increases the combustion duration. Hydrogen combustion at ambient temperatures below 1200 K follows the Arrhenius equation.     

LKP方程在天然气相平衡计算中的应用

由于液化天然气(LNG)所具有的低温特性,其在储运中必然会发生相态的变化.目前,对于天然气相平衡的计算大多应用状态方程法,采用P-R方程和SRK方程进行计算.本文采用了LKP方程进行了气液相平衡的计算,通过与实验值的对比表明:应用LKP状态方程用于天然气及混合制冷剂的相平衡计算具有较好的精度,能够满足进一步天然气热物性...     

微细通道内可燃气体预混燃烧实验与微型发动机燃烧方案

针对微型涡轮气体发动机的研制现状，讨论了微细通道稳定燃烧面临的难题。开展了微细通道内燃气与空气预混燃烧的火焰稳定性实验研究，通过测试获得了氢气和乙炔燃烧的着火浓度极限。结果表明：微细通道内可燃气体与空气的预混燃烧具有可行性，但可燃浓度范围明显缩小；采用增压燃烧，可以扩大其可燃浓度范围，提高燃烧稳定性；与大通道相比，微细通道不易发生回火，但容易发生火焰吹熄，而燃气浓度较高的混合气流相对不易被吹熄，燃烧稳定性较好。     

高温空气燃烧系统中陶瓷蓄热体传热特性分析研究

针对小球、圆孔、方格孔、三角孔和正六边形孔蜂窝体等不同几何结构下的陶瓷蓄热体对高温空气燃烧系统的非稳态交替加热和冷却的传热过程的影响进行了理论分析，得出了正方形蜂窝体具有最佳的比表面积和开孔率的结论。建立了陶瓷蓄热体和气体的温度变化微分方程和数值计算的离散方程，并选取实例进行了数值计算，得出了温度变化和传热变化的特性曲线，其与实验测试结果变化规律基本一致。研究结果可以为高温空气燃烧过程中合理有效地控制蓄热体中交替换热过程提供理论依据。