基于遗传算法的某350 MW机组低压排汽缸自动优化
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摘要
低压排汽缸的性能对汽轮机经济性影响很大,国内外已有很多对排汽缸的研究,自动优化可使低压排汽缸优化更精细化。本文将低压排汽缸进行参数化设计,基于遗传算法对其进行自动优化,并分析了导流环上半修小对自动优化后导流环型线及排气缸性能的影响。结果表明导流环上半修小后自动优化的结果与不修的对比,修小后流场更加稳定,排汽缸静压恢复系数提高约3.2%;与原始对比,优化后排汽缸静压恢复系数提高了11.4%。
The performance of the exhaust hood has great influence on steam turbine economy. There are many researches on exhaust hood at home and abroad, and automatic optimization of exhaust hood making the optimization more refinement. In this paper, the exhaust hood by parametric modeling is automatic optimized based on genetic algorithm, and two optimization schemes are analyzed. The results show that when minor repair the guide, the streamline of the optimized result is more stable, and the static pressure recovery is increased by 3.2% prepared with no repair. Compared with original model, the static pressure recovery is increased by 11.4%.
The performance of the exhaust hood has great influence on steam turbine economy. There are many researches on exhaust hood at home and abroad, and automatic optimization of exhaust hood making the optimization more refinement. In this paper, the exhaust hood by parametric modeling is automatic optimized based on genetic algorithm, and two optimization schemes are analyzed. The results show that when minor repair the guide, the streamline of the optimized result is more stable, and the static pressure recovery is increased by 3.2% prepared with no repair. Compared with original model, the static pressure recovery is increased by 11.4%.
引文
[1]杨建道,陈涛文,宋立明,李军.低压排汽缸气动优化设计[J]:西安交通大学学报,2015,49(3):20-24
[2]王红涛,竺晓程,阳虹,周代伟,杜朝辉.基于iSight平台的汽轮机低压排汽缸气动优化设计[J].动力工程,2009,29(7):650-655
[3]Mingyan YIN,Chen Yang,Liu Meng,Wei Yan,Zhong Zhuhai,Jun LI,Zhenping FENG.Numerical Analysis on the Swirl Flows in the Exhaust Hood Of Steam Turbine and Optimization Design[J].ASME Turbo Expo 2016:Turbomachinery Technical Conference and Exposition,American Society of Mechanical Engineers,2016
[4]曹丽华,周凯,陈美端,李勇.导流环结构对汽轮机排汽缸气动性能的影响[J].汽轮机技术,2018,60(1):1-5
[5]江生科,彭英杰.大型汽轮机低压排汽缸气动分析研究[J]:东方汽轮机,2014,2:1-4+10
[6]Liu Meng,Chen Yang,Zhong Zhuhai,Zhang Xiaodan,Deng Guoliang.Numerical Tests on the Effect Factors of the Last Stage Blade for Low Pressure Exhaust Hood Simulation[J].ASME Turbo Expo 2017:Turbomachinery Technical Conference and Exposition,American Society of Mechanical Engineers,2017
[7]李军,李志刚,晏鑫.汽轮机排汽缸性能分析和气动设计的研究进展[J].热力透平,2013,42(1):1-8
[2]王红涛,竺晓程,阳虹,周代伟,杜朝辉.基于iSight平台的汽轮机低压排汽缸气动优化设计[J].动力工程,2009,29(7):650-655
[3]Mingyan YIN,Chen Yang,Liu Meng,Wei Yan,Zhong Zhuhai,Jun LI,Zhenping FENG.Numerical Analysis on the Swirl Flows in the Exhaust Hood Of Steam Turbine and Optimization Design[J].ASME Turbo Expo 2016:Turbomachinery Technical Conference and Exposition,American Society of Mechanical Engineers,2016
[4]曹丽华,周凯,陈美端,李勇.导流环结构对汽轮机排汽缸气动性能的影响[J].汽轮机技术,2018,60(1):1-5
[5]江生科,彭英杰.大型汽轮机低压排汽缸气动分析研究[J]:东方汽轮机,2014,2:1-4+10
[6]Liu Meng,Chen Yang,Zhong Zhuhai,Zhang Xiaodan,Deng Guoliang.Numerical Tests on the Effect Factors of the Last Stage Blade for Low Pressure Exhaust Hood Simulation[J].ASME Turbo Expo 2017:Turbomachinery Technical Conference and Exposition,American Society of Mechanical Engineers,2017
[7]李军,李志刚,晏鑫.汽轮机排汽缸性能分析和气动设计的研究进展[J].热力透平,2013,42(1):1-8