頁籤選單縮合
題名 | 低Kn數氣流中微粒光泳之理論分析=Theoretical Analysis of Micro-Particle Photophoresis in Low-Kn Gaseous Flows |
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作者姓名(中文) | 劉中和; 李汶墾; 宋齊有; 曾培元; | 書刊名 | 航空太空及民航學刊. 系列B |
卷期 | 42:2 2010.10[民99.10] |
頁次 | 頁105-112 |
分類號 | 447.5532 |
關鍵詞 | 非對稱因子; 尺寸參數; 光泳力; 光泳速度; Asymmetry factor; Size parameter; Photophoretic force; Photophoretic velocity; |
語文 | 中文(Chinese) |
中文摘要 | 本文旨在以理論分析探討微粒在低Kn數氣流中之光泳現象。微粒受均勻光照射後,由於微粒內部吸收及散射電磁能,並轉化成熱能,因微粒內部熱能的分布不均勻而產生光泳力驅動微粒;當微粒趨向光源稱爲負光泳,遠離光源則稱爲正光泳,正、負光泳力的方向由非對稱因子決定。本文以前人之Mie理論爲基礎,計算不同條件下之非對稱因子及光泳力,進而系統化地探討微粒尺寸、折射率及吸光特性等各參數對非對稱因子、光泳力與光泳速度之影響。 |
英文摘要 | The objective of the present study is to investigate micro-particle photophoresis in gaseous media through a theoretical analysis. A particle subjected to an intense light beam absorbs and scatters light and turns electromagnetic energy into thermal energy within the particle resulted in photophoretic force to drive the particle. The force on a particle can be directed either toward (negative photophoresis) or away from (positive photophoresis) the light source. The direction of the photophoretic force can be determined by the sign of the asymmetry factor. Based on the previous Mie theory, we evaluate asymmetry factor and photophoretic force at various conditions, and then systematically explore the influences of the particle size, refractive index and absorptivity on the asymmetry factor, photophoretic force and photophoretic velocity. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。