西安交通大学能源与动力工程学院叶轮机械研究所,西安,710049
网络首发:2018-03-10,
纸质出版:2018
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范小军 1, 邹佳生 1, 周源远 1, 等. 喷嘴数和温比对旋流冷却流动和传热特性的影响[J]. 西安交通大学学报, 2018,52(3):19-24+33.
Effects of Nozzle Numbers and Temperature Ratios on Flow and Heat Transfer Characteristics of Vortex Cooling[J]. 2018, 52(3): 19-24+33.
范小军 1, 邹佳生 1, 周源远 1, 等. 喷嘴数和温比对旋流冷却流动和传热特性的影响[J]. 西安交通大学学报, 2018,52(3):19-24+33. DOI: 10.7652/xjtuxb201803003.
Effects of Nozzle Numbers and Temperature Ratios on Flow and Heat Transfer Characteristics of Vortex Cooling[J]. 2018, 52(3): 19-24+33. DOI: 10.7652/xjtuxb201803003.
针对喷嘴数和温比对叶片前缘旋流冷却特性影响的问题
根据实际燃气轮机前缘结构进一步完善了旋流冷却模型
建立了含有进气腔室的旋流腔结构
采用数值模拟方法分析了喷嘴数和温比对旋流冷却特性的影响。研究时保持进口雷诺数和靶面温度不变
仅改变喷嘴数和温比。研究结果表明:进气腔室的引入使得喷嘴冷气沿流动方向逐渐增加。随着喷嘴数增加
喷嘴冷气流速降低
压力系数增加
流阻系数减小
换热强度降低但均匀性提高
综合换热因子增大。随着温比增加
喷嘴冷气流速增加
流阻系数减小
靶面热流密度降低
换热强度提高
综合换热因子增大。对于含有进气腔的叶片前缘冷却结构
推荐选取喷嘴数为6
温比范围为0.6~0.7。
Aiming at the influences of the number of nozzles and temperature ratio on vortex cooling characteristics of gas turbine blade leading edge
a coolant chamber was added to establish a more reasonable vortex cooling configuration. Numerical method was used to investigate the flow and heat transfer behavior. The inlet Reynolds number and target temperature remained constant while the number of nozzles and temperature ratio were changed in the research. Results showed that the mass flow of air from nozzles increases along the flow direction with the introduction of coolant chamber. As the number of nozzles increases
the velocity of nozzle air
the friction coefficient and the heat transfer intensity decrease while the pressure coefficient
the uniformity of heat transfer intensity distribution and the thermal performance factor increase. As temperature ratio increases
the velocity of air from nozzles
the heat transfer intensity and the thermal performance factor increase
while the friction coefficient and the target heat flux decrease. For the gas turbine blade leading edge with the coolant chamber
the number of nozzles N=6 and the temperature ratio 0.6-0.7 are recommended.
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徐亮,兰进,高建民,等.一种类螺纹孔结构的旋转射流换热特性数值模拟.2017,51(9):11-18.[doi:10.7652/xjtuxb2017 09002]
范小军,杜长河,李亮,等.4种冷却结构对叶片前缘流动换热影响的比较研究.2017,51(7):37-43.[doi:10.7652/xjtuxb 201707006]
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