Fluid-Dynamics Analysis and Structural Optimization of a 300 kW MicroGas Turbine Recuperator  

作　　者：Weiting Jiang Tingni He Chongyang Wang Weiguo Pan Jiang Liu 

机构地区：[1]Shanghai University of Electric Power,Shanghai,201306,China

出　　处：《Fluid Dynamics & Materials Processing》2023年第6期1447-1461,共15页流体力学与材料加工（英文）

基　　金：supported by the Scientific Problem Tackling Program of Science and Technology Commission of Shanghai Municipality(18DZ1202000);the Shanghai Local University Project“Research and Application of Key Technologies of New Efficient Micro Gas Turbine System”(No.19020500900).

摘　　要：Computational Fluid Dynamics(CFD)is used here to reduce pressure loss and improve heat exchange efficiency in the recuperator associated with a gas turbine.First,numerical simulations of the high-temperature and lowtemperature channels are performed and,the calculated results are compared with experimental data(to verify the reliability of the numerical method).Second,the flow field structure of the low-temperature side channel is critically analyzed,leading to the conclusion that the flow velocity distribution in the low-temperature side channel is uneven,and its resistance is significantly higher than that in the high-temperature side.Therefore,five alternate structural schemes are proposed for the optimization of the low-temperature side.In particular,to reduce the flow velocity in the upper channel,the rib length of each channel at the inlet of the low-temperature side region is adjusted.The performances of the 5 schemes are compared,leading to the identification of the configuration able to guarantee a uniform flow rate and minimize the pressure drop.Finally,the heat transfer performance of the optimized recuperator structure is evaluated,and it is shown that the effectiveness of the recuperator is increased by 1.5%.

关 键 词：Micro gas turbine RECUPERATOR structural optimization numerical simulation 

分 类 号：O35[理学—流体力学]