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Experimental and numerical study of water sprayed turbulent combustion: Proposal of a neural network modeling for five-dimensional flamelet approach

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能源与人工智能(英文) 2021年第3期5卷 316-324页

作者： Takafumi Honzawa Reo Kai Kotaro Hori Makoto Seino Takayuki Nishiie ryoichi kurose Department of Mechanical Engineering and Science Graduate School of EngineeringKyoto UniversityKyoto daigaku-KatsuraNishikyo-kuKyoto 615-8540Japan Tokyo Gas Co. Ltd.1-7-7 Suehiro-choTsurumi-kuYokohamaKanagawa 230-0045Japan Numerical Flow Designing Co. Ltd.1-10-10Higashi-GotandaShinagawa-kuTokyo 141-0022Japan

Owing to the increasing worldwide demand for natural gas,the development of a large submerged combustion vaporizer is *** burner is equipped with a water spray nozzle to reduce nitrogen oxides,and a practi-cal simulation method is required for the optimal *** non-adiabatic flamelet approach can predict the combustion emissions and is useful for reducing simulation ***,as the number of control variables increases,the database requires larger memory and cannot be dealt with by general *** this study,an artificial neural network(ANN)model based on a five-dimensional flamelet database,which includes the effects of heat loss and vapor concentration by sprayed water evaporation,is ***,large eddy sim-ulations(LESs)for turbulent combustion fields with and without water spray are conducted employing flamelet generated manifold(FGM)approach with this ANN model,and the validity is *** comparison,a lab-scale burner equipped with a water spray nozzle is manufactured,and combustion experiments with and without water spray are *** results show that CO,NO,temperature,and reaction rate of progress variable predicted by the present ANN model are in good agreement with those of a five-dimensional flamelet *** the condition without water spray,the flame behavior predicted by the LES employing the FGM/ANN ap-proach is in good agreement with that employing the conventional FGM approach,while indicating much lower memory,although there appeared some quantitative discrepancies in the temperature against the experiment probably partially because of the insufficiency of the FGM approach for the present complex flame *** the condition with water spray,the LES employing the FGM/ANN approach is able to capture the effect of the water spray on the flame behavior in the experiment,such that the water spray decreases the temperature,which causes the decrease in NO but increase in CO.

关键词： Neural network modeling Five-dimensional flamelet approach Water spray Large eddy simulation

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Improvement on Quantitative Measurement of Fly Ash Contents Using Laser-Induced Breakdown Spectroscopy

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Journal of Flow Control, Measurement & Visualization 2015年第1期3卷 10-21页

作者： Zhenzhen Wang Yoshihiro Deguchi Hiroaki Watanabe ryoichi kurose Junjie Yan Jiping Liu State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Xi’an China Graduate School of Advanced Technology and Science The University of Tokushima Tokushima Japan Energy Engineering Research Laboratory The Central Research Institute of Electric Power Industry Kanagawa Japan Department of Mechanical Engineering and Science Advanced Research Institute of Fluid Science and Engineering Kyoto University Kyoto Japan

Contents of fly ash are important factors for the operation of coal-fired plants. Real-time monitoring of coal and fly ash such as unburned carbon in fly ash can be an indicator of the combustion conditions. Because of the strong signal intensity and the relative simplicity of the LIBS (Laser- Induced Breakdown Spectroscopy) technique, LIBS can be applicable for real-time composition measurement of coal and fly ash. This research presented here focused on the clarification of the effects of plasma temperature and coexisting materials on quantitative measurement of fly ash contents. Quantitative capability of LIBS was improved using the proposed plasma temperature correction method. The CO2 effect was also discussed to accurately evaluate unburned carbon in fly ash in exhausts. Using the results shown in this study, quantitative measurement of fly ash contents has been improved for wider applications of LIBS to practical fields.

关键词： Laser-Induced Breakdown Spectroscopy Fly Ash Temperature Correction CO2 Effect

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多煤种低氮燃烧及煤的燃尽研究

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上海电力 2005年第5期18卷 462-465页

作者： Hisao Makino Michitaka Ikeda ryoichi kurose 吕晓东（译）翁一武（校）日本中央电力研究所不详

介绍了采用由日本中央电力研究所(CRIEPI)和石川岛播磨重工业有限公司(I HI)共同研发的CI-α新型旋流燃烧器和分级送风技术,分别对烟煤、次烟煤、高燃料比煤进行燃烧优化的实验研究。通过对实验结果的分析,得出的实验数据在工业试验上... 详细信息

介绍了采用由日本中央电力研究所(CRIEPI)和石川岛播磨重工业有限公司(I HI)共同研发的CI-α新型旋流燃烧器和分级送风技术,分别对烟煤、次烟煤、高燃料比煤进行燃烧优化的实验研究。通过对实验结果的分析,得出的实验数据在工业试验上得到了证实。由CI-α新型旋流燃烧器组成的先进、分级低氮燃烧系统,对不同煤种均有良好的适应性,并具有经济、环保、稳燃、燃尽的综合效应。

关键词：低氮燃烧 CI-α旋流燃烧器烟煤次烟煤燃烧优化高燃料比煤

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