CAJ | 학술논문

为了改善燃气轮机的散热性能，以国产某型管带式散热器替换ГТД-1250燃气轮机管片式散热器，建立了管片式和管带式散热器空气侧通道的稳态紊流数学模型，对2种不同类型散热器的阻力特性和表面传热特性进行CFD模拟，模拟结果与试验结果符合较好。数值仿真结果对比表明：散热器的压力降随冷却空气进口速度的增大而增大，且在相同的冷却空气进口流速下，管带式高出管片式散热器空气侧阻力的平均值约3．13％，同时管带式比管片式空气出口温度的平均值高出约6．29％。
위료개선연기륜궤적산열성능，이국산모형관대식산열기체환ГТД-1250연기륜궤관편식산열기，건립료관편식화관대식산열기공기측통도적은태문류수학모형，대2충불동류형산열기적조력특성화표면전열특성진행CFD모의，모의결과여시험결과부합교호。수치방진결과대비표명：산열기적압력강수냉각공기진구속도적증대이증대，차재상동적냉각공기진구류속하，관대식고출관편식산열기공기측조력적평균치약3．13％，동시관대식비관편식공기출구온도적평균치고출약6．29％。
In order to improve the thermal performance of gas turbines, the domestic tube type radiator is used to replace ГТД-1250 gas turbine gilled tube radiator. A steady-state turbulent flow mathematical model of air side channel of gilled tube radiator and domestic tube type radiator is established for simula- ting the resistance characteristics and surface heat transfer characteristics of each type of radiators with CFD. The simulation result fits to the experimental result well. Through analysis and comparison of the simulation result, the conclusion is as follows : radiator pressure drops with the increase of the cooling air inlet speed; with the same cooling air inlet flow rate, the air side resistance in the gilled tube radiator is about 3.13% higher than the average of that in the tube type radiator, while the air outlet average tem- perature of the domestic tube type radiator is about 6.29% higher than that of gilled tube radiator.