Effects of Hot-Gas Composition on Temperature Distribution in a Flat Plate Cooled by Internal and Film Cooling
Effects of Hot-Gas Composition on Temperature Distribution in a Flat Plate Cooled by Internal and Film Cooling
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DOI：
10.1115/gt2009-59727
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
S. Na;R. Dennis;C. Alsup;K. Bryden;T. Shih
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文献类型：
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作者：
S. Na;R. Dennis;C. Alsup;K. Bryden;T. Shih
开发以煤为原料的合成气 (syngas) 和氢燃料运行的涡轮机技术对于开发可捕获和分离二氧化碳 (CO2) 的先进发电系统至关重要。燃烧此类燃料引起的一个问题是热气体成分的变化，其比热、导热率和分子量不同。另一个问题是由于增加的体积流量而增加了热气侧的传热速率。在本研究中，通过 CFD 模拟来检查带有或不带有热障涂层的平板内部和周围的传热和温度分布，该平板通过内部冷却和薄膜冷却进行冷却，其中热气成分来自天然气、合成气、氢气和富氧燃料的燃烧产物。还检查了毕奥数从传导传热的可忽略阻力到传导和对流阻力相当时的影响。该计算研究基于系综平均连续性、物质平衡、可压缩纳维-斯托克斯和由气相可实现的 k-e 湍流模型（未使用壁函数）封闭的能量方程以及固相传导的傅里叶方程。版权所有 © 2009 ASME
Developing turbine technologies to operate on coal-derived synthesis gas (syngas) and hydrogen fuels is critical to the development of advanced power generation systems that can lead to the capture and separation of carbon dioxide (CO2 ). One issue that arises from burning such fuels is the change in the hot-gas constituents, which differ in specific heats, thermal conductivity, and molecular weight. Another issue is increased heat-transfer rate from the hot-gas side from increased volumetric flow rate. In this study, CFD simulations were performed to examine the heat transfer and temperature distributions in and about a flat plate with and without thermal-barrier coating that is cooled by internal and film cooling in which the hot-gas constituents are from the products of combustion of natural gas, syngas, hydrogen, and oxyfuel. Also examined is the effect of Biot number from negligible resistance by conduction heat transfer to when the resistance by conduction and convection is comparable. This computational study is based on the ensemble average continuity, species balance, compressible Navier-Stokes, and energy equations closed by the realizeable k-e turbulence model (wall functions were not used) for the gas phase and the Fourier equations for conduction in the solid phase.Copyright © 2009 by ASME