1. 重庆大学低品位能源利用技术及系统教育部重点实验室,重庆,400030
2. 重庆大学动力工程学院,重庆,400030
网络首发:2014-09-10,
纸质出版:2014
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朱桂同 1, 陈清华 1, 刘娟芳 1, 等. 电气体发电中有热添加的喷管流动及热力循环分析[J]. 西安交通大学学报, 2014,48(9):68-73.
Analysis on the Nozzle Flow with Heat Addition and Its Thermal Cycle Efficiency in Electrogasdynamics[J]. 2014, 48(9): 68-73.
朱桂同 1, 陈清华 1, 刘娟芳 1, 等. 电气体发电中有热添加的喷管流动及热力循环分析[J]. 西安交通大学学报, 2014,48(9):68-73. DOI: 10.7652/xjtuxb201409012.
Analysis on the Nozzle Flow with Heat Addition and Its Thermal Cycle Efficiency in Electrogasdynamics[J]. 2014, 48(9): 68-73. DOI: 10.7652/xjtuxb201409012.
为了提高电气体发电循环的热效率
在有回热的布雷顿循环基础上
对喷管中膨胀的气体进行加热
使循环过程尽量接近Ericsson循环。用CFD数值模拟的方法研究了有热添加的喷管流动
并分析了喷管加热对循环热效率的影响
提出了一种可以提高电气体发电循环热效率的方法。计算和分析结果表明:定热流加热条件下
延长喷管渐缩段和增大入口高度能有效提高喷管流体速度和温度; 受边界层的限制
壁面加热方式对主流区域影响不大
而内热源加热方式在主流区域效果明显; 将壁面和内热源加热方式结合能够有效地将热量添加到喷管气流中
并能提高循环热效率。
In order to improve the thermal efficiency
the gas flow in a nozzle of the regenerative Brayton cycle was heated in the expansion process of gas
which can make the electrogasdynamic cycle process approach an Ericsson cycle. The flat Laval nozzle for the electrogasdynamic(EGD)converter was designed and optimized. The nozzle flow with heat addition was investigated through CFD simulation. With a constant flux on the wall
the nozzle with a longer converging section and higher entrance can effectively increase the gas flow velocity and temperature. Heat addition through nozzle wall has little impact on gas velocity and temperature in the regions around the centerline due to the effect of boundary layer. Whereas the inner heat source based heating can significantly increase the gas velocity and temperature in nozzle's central region. The combined heat addition mode of wall heating and inner heat source can effectively improve the thermal cycle efficiency.
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赵曙,朱惠人,郭涛,等.出流比及旋转数对回转通道流动换热影响.2014,48(6):117-121.[doi:10.7652/xjtuxb2014060 20]
郭朋华,王元,李景银.太阳能烟囱发电系统内传热问题的数值分析.2014,48(3):102-107.[doi:10.7652/xjtuxb2014030 19]
赵曙,朱惠人,郭涛,等.旋转带肋回转通道流动换热数值模拟.2014,48(2):125-130.[doi:10.7652/xjtuxb201402021]
唐文勇,陈清华,陈子云,等.送粉气流对冷喷涂流场及粒子速度影响的数值模拟.2012,46(7):82-86.[doi:10.7652/xjtuxb201207015]
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