超临界二氧化碳高压涡轮气动设计及性能  

Aerodynamic design and performance of SCO_2 high pressure turbines

作　　者：韩万龙 丰镇平[2] 王月明[1] 李红智[1] 周东 但光局 郭必敏 HAN Wanlong1,2, FENG Zhenping2, WANG Yueming1, LI Hongzhi1, ZHOU Dong3, DAN Guangju3, GUO Bimin3(1.Xi’an Thermal Power Research Institute Co., Ltd. Xi’an 710054, China;2.School of Energy and Power Engineering, Xi＇an Jiaotong University, Xi’an 710049, China;3.Chongqing Jiangjin Shipbuilding Industry Co., Ltd., Chongqing 402263, Chin)

机构地区：[1]西安热工研究院有限公司,西安710054 [2]西安交通大学能源与动力工程学院,西安710049 [3]重庆江增船舶重工有限公司,重庆402263

出　　处：《哈尔滨工业大学学报》2018年第7期192-198,共7页Journal of Harbin Institute of Technology

基　　金：中国博士后科学基金(2017M613294XB);国家自然科学基金(51406166;51706181);陕西省博士后项目(2017BSHQYXMZZ08);华能集团重大专项(HNKJ15-H07);中国电机工程学会青年人才计划(JLB-2016-70)

摘　　要：为建立高性能超临界二氧化碳(SCO2)布雷顿循环系统,基于西安热工研究院的5 MW等级SCO2火力发电试验平台的高压涡轮设计参数,采用基于Denton损失模型的自编一维涡轮设计程序、AXIAL软件及AXCENT软件设计了2级轴流超临界二氧化碳涡轮,采用CFX软件RANS方程与NIST的真实超临界二氧化碳工质物性数据相结合的数值方法,研究了超临界二氧化碳高压涡轮设计工况和变工况气动特性.结果表明:综合考虑高设计参数下的超临界二氧化碳涡轮辅助系统的可实现性,选择两级轴流直叶栅涡轮设计方案,经叶型优化后可实现两列涡轮静叶的总压损失约为0.042,第1/第2列动叶栅相对总压损失为0.050和0.064,叶片的根部、中部和顶部流场的马赫数分布合理.考虑动静叶泄漏掺混损失的高压涡轮的等熵效率可达到84.88%,轴功率3 251 k W,涡轮变工况性能良好.To establish a high performance supercritical carbon dioxide（ SCO2） Brayton cycle system,a two-stage SCO2 axial turbine was designed for the 5 MW supercritical carbon dioxide thermal power platform by using the selfcompiled one-dimensional turbine design program based on the Denton loss model,AXIAL software and AXCENT software. RANS equations and SST Turbulence Model were chosen for numerical study on the aerothermodynamics performance of SCO2 turbines in the design working condition and variable operating conditions using commercial software CFX and the real physical properties of SCO2 from the NIST software. Simulation results indicated that the two stage axial flow straight cascade turbine scheme was selected in considering the realizability of the auxiliary system of the SCO2 turbine with high design parameters. After the blade optimization,the total pressure loss of two rows of turbine stator blades is about 0.042,and the relative total pressure loss of the first and second rotor cascade were 0.050 and 0.064,respectively. The Mach number distribution of the root,middle and top flow field of turbine blades is reasonable. Considering the leakage and mixing loss of the stator and rotor blades,the isentropic efficiency of the SCO2 high pressure turbine with the good variable operating performance can reach 84. 88% and the shaft power of the turbine is 3 251 k W at the design point,which can meet the design requirements.

关 键 词：超临界二氧化碳涡轮 涡轮叶片 气动性能 高设计参数 真实物性 变工况 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]