湿压缩压气机特性的研究

向压气机喷水可减少压气机压缩功。喷水后由于工质的性质发生改变，而使压气机特性发生变化。为了得到喷水后的压气机特性，采用近似相似理论对喷水后压气机特性进行仿真，得到喷水对压气机压比、流量等特性的影响。由于压气机特性通过近似模化得到湿压缩压气机特性，为湿压缩技术在燃气轮机、涡轮增压柴油机和涡轮增压汽油机的应用研究奠定了基础。     

柴油机进气喷水技术探讨

对柴油机进气喷水进行了试验研究 ,在此基础上 ,分析了直喷式柴油机进气喷水对燃油雾化和燃烧的作用机理 ,并对进气喷水的热力循环进行分析 ,为此技术的开发与应用提供可行性依据。试验结果表明 :进气喷水具有降低柴油机的燃油消耗率、排气温度和烟度等作用。     

湿压缩过程的热力学指标及湿压缩燃机循环性能分析

给出了评价湿压缩过程完善性的热力学指标－湿压缩效率的定义，研究了压气机入口喷水湿压缩简单燃机循环的性能特点和规律，并与常规简单燃机循环进行了比较，结果表明湿压缩在提高燃机循环性能方面有很大潜力。     

压气机进口喷水湿压缩技术应用的限制因素

压气机进口喷水湿压缩技术近年来不但在电站燃气轮机上得到了广泛的应用,而且也开始应用在机械驱动燃气轮机上,同时在工业压气机上也开始了应用。湿压缩技术可以节省压缩耗功,是在炎热气候条件下恢复燃气轮机功率的有效措施。根据国内外分析和应用的经验,本文提出了在应用这项技术时应该注意的几个问题。首先是喷水颗粒尺寸的分布;其次应该注意喷水加湿的装置和过程不要引起压气机效率的降低以及其它值得注意的问题。     

循环流化床烟气脱硫多层喷水的试验研究及其产物分析

在循环流化床烟气脱硫试验台上进行了多层喷水脱硫的试验研究，分析了反应发生的原理，对脱硫产物进行了电镜分析，揭示了含湿钙基脱硫剂的脱硫机理。试验表明：多层喷水与传统的单层喷水相比，流化床内 温度分布更加均匀，趋近饱和温度△T值有较大降低，脱硫效率明显提高，系统运行更加稳定可靠。质谱分析和电镜分析表明：SO2与Ca（OH）2反应后，在脱硫剂的表面形成产物层，减缓了SO2与脱硫的进一步反应。     

压气机的湿压缩特性及计算模型初步研究

在大量分析国外有关的压气机通流部分喷水的资料基础上,根据已取得的初步实验结果,总结了喷水后压气机性能的主要特点及影响性能的关键因素,从理论上对这些特点进行了分析论证。最后根据“湿压缩”的特点,提出了一种计算模型。     

超超临界机组喷水减温系统的热经济性分析

针对超超临界机组过热器、再热器喷水减温机理进行了分析,以引进型1 000MW机组为例,运用现行矩阵分析方法,经过严密的数学推导,建立了过热器、再热器减温喷水对机组热经济性影响的计算模型,对过热器和再热器喷水减温系统对机组热经济性的影响进行了定量分析.分析得出再热器喷水减温对机组经济性的影响比过热器喷水减温的影响要大得多.再热器最小喷水减温量的热经济性比过热器允许最大喷水减温量的热经济性还要差,运行时应尽量减少或避免采用再热器喷水减温.     

湿压缩压气机及压缩系统性能的理论研究

详细介绍了在压缩系统中液滴蒸发速率的计算方法，通过这种方法得出了蒸发速率与压比、进口温度的关系；并且建立了理想和实际湿压缩的数学模型，在此基础上应用上述液滴蒸发速率的计算方法分别得出压缩终温、压缩功随喷水百分比及效率的变化关系。     

三级轴流压气机湿压缩特性分析

湿压缩技术能够使燃气轮机在一定程度上达到节能减排的效果,但喷水后引入的附加损失使湿压缩效果趋于不利,需要对湿压缩特性以及该技术可能带来的负面作用进行分析研究。利用CFX软件对某型三级轴流压气机在设计工况下的湿压缩进行全三维数值模拟,分析湿压缩对压气机性能的影响。结果表明,湿压缩能够有效降低压气机出口温度,且应用在压力较高的叶栅流道内更具有优势;湿压缩应用在该低压轴流压气机中存在明显的负面作用。     

直接喷水降低NOx排放技术在船用发动机上的应用

通过对NOx形成机理的简略介绍,详细讨论了直接喷水技术降低NO_x排放的原理和方法。瓦锡兰设计的直接喷水系统在实船上的应用效果良好,在船舶上会有很好的发展前景。     

压气机不同运行工况下湿压缩性能分析

湿压缩技术能够有效提高燃气轮机输出功,降低燃气轮机对大气环境的依赖程度.该技术对压气机的影响因素非常复杂,压气机的运行工况对湿压缩效果的影响甚大.本研究采用CFX软件对某型三级轴流压气机在不同工况下的干、湿压缩过程进行三雏数值模拟.结果表明:压比不变的情况下,高转速时压气机近失速边界处质量流量增加,低转速时质量流量下降...     

Analysis of gas turbine operating parameters with inlet fogging and wet compression processes

Inlet fogging has been widely noticed in recent years as a method of gas turbine air inlet cooling for increasing the power output in gas turbines and combined cycle power plants. The effects of evaporative cooling on gas turbine performance were studied in this paper. Evaporative cooling process occurs in both compressor inlet duct (inlet fogging) and inside the compressor (wet compression). By predicting the reduction in compressor discharge air temperature, the modeling results were compared with the corresponding results reported in literature and an acceptable difference percent point was found in this comparison. Then, the effects of both evaporative cooling in inlet duct, and wet compression in compressor, on the power output, turbine exhaust temperature, and cycle efficiency of 16 models of gas turbines categorized in four A–D classes of power output, were investigated. The results of this analysis for saturated inlet fogging as well as 1% and 2% overspray are reported and the prediction equations for the amount of actual increased net power output of various gas turbine nominal power output are proposed. Furthermore the change in values of physical parameters and moving the compressor operating point towards the surge line in compressor map was investigated in inlet fogging and wet compression processes.     

湿压缩对压缩系统失速后瞬态响应的影响分析

建立了湿压缩系统的Moore-Greitzer模型，该模型可以用来分析湿压缩对压缩系统失速后瞬态响应的影响，模型仿真结果定性的描述了湿压缩对压缩系统不稳定工作特性的影响，结果显示：在一定条件下，湿压缩可以消除喘振和旋转失速，提高系统的运行稳定性，增强压气机、压缩系统和燃气轮机的性能。     

燃气轮机装置中湿压缩过程的一般规律及性能

从热力学和传热传质学基本原理出发，研究了湿压缩过程的一般规律和性能，为湿压缩技术的实现提供了一定的理论依据。     

压气机不同加湿条件下湿压缩性能分析

湿压缩技术能够有效地提高燃气轮机性能,加湿条件是影响湿压缩技术的重要因素之一.本文利用计算流体力学软件CFX,对某型三级轴流压气机在不同加湿条件下的湿压缩过程进行三维数值模拟.根据计算结果,对不同加湿条件下的湿压缩效果进行比较分析.研究表明,在不考虑叶片腐蚀的前提下,当喷入的水滴直径为10μm时,湿压缩效果最好;加湿量...     

Evaluation of water injection effect on compressor and engine performance and operability

Gas turbine performance enhancement technologies such as inlet fogging, combustor water/steam injection and overspray are being employed by users in recent years without fully evaluating their effect on gas turbine performance and operability. The water injection techniques can significantly affect the engine operating point thus a careful analysis should precede the application of performance enhancement devices, especially when the devices are retrofitted to old engines or engines operating at extreme conditions. The present paper examines the most widespread techniques that implement water injection by using in-house models that can reproduce the effects of water injection on the gas turbine and compressor off-design operation. The results are analyzed with respect to both performance augmentation and engine operability in order to give further insight on gas turbine operation with water injection. The behaviour of the gas turbine is interpreted while the risks on engine integrity due to water injection are identified.     

The wet compression technology for gas turbine power plants: Thermodynamic model

This paper examines from a thermodynamic point of view the effects of wet compression on gas turbine power plants, particularly analysing the influence of ambient conditions on the plant performance.The results of the mathematical model, implemented in “Matlab” software, have been compared with the simulation results presented in literature and in particular the values of the “evaporative rate”, proposed in Araimo et al. [L. Araimo, A. Torelli, Thermodynamic analysis of the wet compression process in heavy duty gas turbine compressors, in: Proceedings of the 59th ATI Annual Congress, Genova, 2004, pp. 1249–1263; L. Araimo, A. Torelli, Wet compression technology applied to heavy duty gas turbines – GT power augmentation and efficiency upgrade, in: Proceedings of the 59th ATI Annual Congress, Genova, 2004, pp. 1265–1277] by “Gas Turbines Department” of Ansaldo Energia S.p.A., have been taken into account to validate the model.The simulator permits to investigate the effects of the fogging and wet compression techniques and estimate the power and efficiency gain of heavy duty gas turbines operating in hot and arid conditions.     

KA_13D燃气轮机注水系统应用

结合电厂几年运行经验，分析了在联合循环运行时向燃气轮机燃烧室注水及不注水情况下对燃烧室热部件耐热瓦及后循环的影响，阐述在联合循环运行时向燃气轮机燃烧室注水及不注水情况下优缺点。