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浏览/检索结果: 共2条，第1-2条 帮助 已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Effect of rib height on turbulent flow and heat transfer of kerosene in rectangular duct 期刊论文 ACTA MECHANICA SINICA, 2022, 卷号: 38, 期号: 7, 页码: 12 作者:  Li, Xian;  Zhong, Fengquan;  Xing, Yunfei 收藏  |  浏览/下载：23/0  |  提交时间：2022/07/18 Rib height  Kerosene  Heat transfer enhancement  Turbulent flow   Geometry parameter optimization of large cross-sectional S-shaped bent rib waveguides for silicon based optical switches 期刊论文 chinese physics letters, 2007, 卷号: 24, 期号: 3, 页码: 744-746 Li ZY (Li Zhi-Yong); Liu JW (Liu Jing-Wei); Yu JZ (Yu Jin-Zhong) 收藏  |  浏览/下载：104/0  |  提交时间：2010/03/29 摘要: By using a genetic algorithm  geometry parameters of large cross-sectional S-bend rib waveguides are optimized aiming at the least total loss when the propagation loss is considered. Optimized results are presented as an example of S-bend rib waveguides based on silicon-on-insulator (SOI) 4 x 4 optical switches. The value of 2dB/cm is given to the propagation loss according to the experimental results. The simulation results indicate that the total loss drops from 1.0002dB down to 0.4375dB without considering a lateral offset. If the offset is adopted  the total loss reduces from 0.5463dB to 0.2365dB. In addition  the effect of the rib height ratio on the loss is analysed  and the optimal ratio is obtained to be 0.55.