Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1063/1.4984475 |
Fluid Flow Analysis Behind Heliostat Using LES and RANS: A Step Towards Optimized Field Design in Desert Regions | |
Boddupalli, Nibodh; Goenka, Vikash; Chandra, Laltu | |
通讯作者 | Chandra, Laltu |
会议名称 | 22nd International Conference on Concentrating Solar Power and Chemical Energy Systems (SOLARPACES) |
会议日期 | OCT 11-14, 2016 |
会议地点 | Abu Dhabi, U ARAB EMIRATES |
英文摘要 | Heliostats are used for concentrating beam radiation onto a receiver. The flow induced dust deposition on these reflectors will lead to failure of the receiver. For this purpose, the wake behind a heliostat is analyzed at 25 degrees of inclination and at a Reynolds number of 60000. In this paper the Reynolds Averaged Navier-Stokes (RANS) and the Large Eddy Simulation (LES) approaches are used for analyzing the air-flow behind a heliostat. LES and RANS are performed with a wall-resolved grid. For the purpose of validation, the horizontal velocity is measured in a wind-tunnel with a model heliostat using laser Doppler velocimetry technique. RANS and LES approaches are found to qualitatively predict the statistical quantities, like the mean horizontal-velocity in comparison to experiment. RANS under-predicts root-mean-square of the horizontal-velocity and even failed to capture the flow features behind heliostat. Thus, it is concluded that RANS will suffice with well-resolved grid for analyzing mean flow features. For analyzing wake and to understand the induced dust deposition LES is required. Further, the analysis reveals that the wake-affected region is up to three times the length of the heliostat's mirror. This can be recommended as the minimum distance between any two aligned heliostats in Jodhpur. |
来源出版物 | INTERNATIONAL CONFERENCE ON CONCENTRATING SOLAR POWER AND CHEMICAL ENERGY SYSTEMS (SOLARPACES 2016) |
ISSN | 0094-243X |
出版年 | 2017 |
卷号 | 1850 |
EISBN | 978-0-7354-1522-5 |
出版者 | AMER INST PHYSICS |
类型 | Proceedings Paper |
语种 | 英语 |
国家 | India |
收录类别 | CPCI-S |
WOS记录号 | WOS:000417377900150 |
WOS关键词 | DUST DEPOSITION ; FLAT-PLATE ; SEPARATED FLOW ; SIMULATIONS ; HEAT |
WOS类目 | Green & Sustainable Science & Technology ; Energy & Fuels |
WOS研究方向 | Science & Technology - Other Topics ; Energy & Fuels |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/306026 |
作者单位 | Indian Inst Technol Jodhpur, Jheepasani 342005, Rajasthan, India |
推荐引用方式 GB/T 7714 | Boddupalli, Nibodh,Goenka, Vikash,Chandra, Laltu. Fluid Flow Analysis Behind Heliostat Using LES and RANS: A Step Towards Optimized Field Design in Desert Regions[C]:AMER INST PHYSICS,2017. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。