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This investigation focused on the analysis of using the M-cycle (Maisotsenko cycle) to improve the efficiency of a gas turbine engine. By combining the M-cycle with an open Brayton cycle, a new cycle, is known as the MCTC (Maisotsenko combustion turbine cycle), was formed. The MCTC used an indirect evaporative air cooler as a saturator with a gas turbine engine. The saturator was applied on the side of the turbine exhaust (M-cycle#2) in the analysis. The analysis included calculations and the development of an EES (engineering equation solver) code to model the MCTC system performance. The resulting performance curves were graphed to show the effects of several parameters on the thermal efficiency and net power output of the gas turbine engine. The models were also compared with actual experimental test that results from a gas turbine engine. Conclusions and discussions of results are also given. 相似文献
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以我国自行研制的9000kW燃气轮机为对象,详细分析了9000kW燃气一蒸汽联合循环的现实性和优越性,为我国自行研制的燃气轮机进一步开发联合循环电站找到了可行的途径。 相似文献
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建立了燃气轮机高温涡轮叶片损伤评估模型,包括热力学性能计算模型、应力评估模型、热评估模型和交互损伤分析模型,无法测量参数由热力学性能计算模型计算,作为应力评估模型和热评估模型的输入。根据蠕变与疲劳损伤模型分析结果,对进气道内使用喷雾冷却降温的燃气轮机高温涡轮叶片进行损伤评估,比较了燃气轮机在不同转速以及负荷下,使用喷雾冷却系统前后,高温涡轮叶片损伤的变化,定量评估喷水量对高温叶片寿命的改善。结果表明:启用喷雾冷却系统可以大幅减小因蠕变造成的叶片损伤,在低负荷(30%)时损伤减小的幅度尤为明显,其预期寿命从40 000 h延长到50 000 h以上,可以大幅延长叶片的使用寿命;在夏季运行时(53%负荷),如果以减少蠕变损伤为目标,可以考虑增加喷水量,从40%~100%,叶片各级蠕变损伤最高可减小13.5%。 相似文献
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着重介绍了上海汽轮机有限公司在空冷领域开发的大功率汽轮机组的结构特点,并在此基础上,适当分析了空冷对汽轮机本体结构的影响,以及在汽轮机设计时所采取的一些措施。 相似文献
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The efficiency and specific power of the steam injected gas turbine is analysed by modelling the thermodynamic cycle. In this model special attention is paid to the blade cooling. The basic cycle as well as cycles with improvements such as intercooling, heat recovery by regenerator and blade cooling using steam are studied. The different cycles are compared with the combined cycle and the intercooled regenerative cycle. The conclusion is that the steam injected cycles have high efficiency and specific power. Adding heat exchangers to the cycle is not beneficial. Using steam as coolant for the blades offers interesting perspectives. Copyright © 2000 John Wiley & Sons, Ltd. 相似文献
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注蒸汽燃气轮机最佳注汽量的研究 总被引:5,自引:1,他引:4
文中首先从部件的热平衡角度出发对注蒸汽燃气轮机循环进行了热力学分析,建立了相应的热力过程计算模型,在压比π=8-48,透平进口温度TIT=900-1300℃的宽广范围内对STIG进行了性能模拟,对最佳注汽量和性能之间的关联进行了广泛深入的研究。 相似文献
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利用数值分析方法研究了新型仿螺旋肋片内冷通道的传热与流动特性。采用横截面积为矩形、上下表面带有间断性倾斜矩形肋片叉排且对置的仿螺旋肋片内部冷却通道。分析了在通道宽高比AR=2.9、肋化比Ff/F=2.545、肋高与通道当量直径比e/Dh=0.336、肋间距与肋高比p/e=0.6、肋片与轴面的夹角β=15°及R e在1×104~2×105时的非旋转情况下,R e、肋片与主流方向夹角α等参数对内冷通道强化传热与流动阻力特性的影响。计算结果表明,该仿螺旋矩形肋片作为旋流形成装置起到了迫使流体旋转运动、提高流速和减小层流底层厚度的作用,通道内流体流动达到了预期的螺旋流动效果,通道平均换热系数得到了明显的提高,但同时流动阻力也显著增加。 相似文献
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喷射器是PRSTIG循环系统的重要组成部分。本文针对SIA-02小燃气轮机组设计了喷射器,并进行了分析。 相似文献
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The integration of an aqua‐ammonia inlet air‐cooling scheme to a cooled gas turbine‐based combined cycle has been analyzed. The heat energy of the exhaust gas prior to the exit of the heat recovery steam generator has been chosen to power the inlet air‐cooling system. Dual pressure reheat heat recovery steam generator is chosen as the combined cycle configuration. Air film cooling has been adopted as the cooling technique for gas turbine blades. A parametric study of the effect of compressor–pressure ratio, compressor inlet temperature, turbine inlet temperature, ambient relative humidity, and ambient temperature on performance parameters of plants has been carried out. It has been observed that vapor absorption inlet air cooling improves the efficiency of gas turbine by upto 7.48% and specific work by more than 18%, respectively. However, on the adoption of this scheme for combined cycles, the plant efficiency has been observed to be adversely affected, although the addition of absorption inlet air cooling results in an increase in plant output by more than 7%. The optimum value of compressor inlet temperature for maximum specific work output has been observed to be 25 °C for the chosen set of conditions. Further reduction of compressor inlet temperature below this optimum value has been observed to adversely affect plant efficiency. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
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介绍了我国第一套燃气轮机回注蒸汽整机实验装置及共部件、设计的主要特点以及初步性能试验结果。 相似文献
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燃气轮机气动热力相关部分问题研究 总被引:2,自引:0,他引:2
简要综述了本研究组近年来在燃气轮机气动热力相关方面的研究工作进展,包括多级轴流压气机整机全工况特性的数值分析,多级轴流压气机间隙流动对性能的影响分析;燃气透平冷却叶片的气动分析方法。着重描述了叶轮机械叶片三维粘性气动优化设计系统及其实用状况。展现了在我国燃气轮机产业的消化吸收与自主研发中发挥作用的可能性,展望了本研究组的长远研究目标。 相似文献
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不同叶顶结构对燃气透平动叶顶部气膜冷却性能的影响 总被引:1,自引:1,他引:1
对不同叶顶结构的GE-E3叶片的气膜冷却现象进行了数值研究,比较了三种不同的叶顶结构:平顶、凹槽顶和平顶开槽孔结构在叶顶部的流动和冷却现象,并分析了吹风比对这三种结构的冷却性能的影响。发现凹槽顶和平顶开槽孔在结构上具有相似性;在叶顶开槽后,既降低了射流动量,又降低了顶端泄漏流速,有助于提高冷却效果,同时由于凹槽顶的槽比开槽孔的槽大,冷却气体和燃气在槽内充分混合,使得凹槽顶结构具有最高的冷却效率值和最低的换热系数值,平顶开槽孔结构次之。 相似文献