青山學院大學林光一教授係列學術報告會 Academic Lecture by Prof. A. Koichi Hayashi at Aoyama Gakuin University-腾讯欢乐炸金花
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青山學院大學林光一教授係列學術報告會 Academic Lecture by Prof. A. Koichi Hayashi at Aoyama Gakuin University
發布時間:2018年09月03日 16:39 作者: 點擊量:

報告人:林 光一 教授

Speaker: Prof. A. Koichi Hayashi

主持人:任兆欣 助理教授

Host: Asst. Prof. Zhaoxin Ren

時間:20180905日(星期三) 上午9:30-11:30

Time: 9:30am-11:30am, Sep. 5, 2018

地點:長安校區動力與能源學院大樓225會議室

Place: Conference room 225, School of Power and Energy

主題:兩相流動,理論與方法的數值分析

Topic: Numerical analysis on two-phase flow; Theory and method

內容簡介:

兩相流問題是科學與工程領域中一個非常普遍的問題。該問題的數值分析從20世紀80年代開始,在計算應用中得到了迅速的發展。處理兩相流有兩種主要方法;拉格朗日和歐拉方法。這節課將從兩相流的基本概念和處理方法開始。介紹了兩相點火和爆轟計算的一些典型實例。

Introduction:

Two-phase flow problem is one of very popular problem in science and engineering field. The numerical analysis of the problem has been started 1980s and has been developed quickly in computational application since then. There are two major ways to take care of two-phase flows; Lagrangian and Eulerian method. The lecture will start with a fundamental idea of two-phase flow and a method to deal with it. Some typical examples of two-phase ignition and detonation calculation will be presented.


報告人:林 光一 教授

Speaker: Prof. A. Koichi Hayashi

主持人:任兆欣 助理教授

Host: Asst. Prof. Zhaoxin Ren

時間:20180906日(星期四) 上午9:30-11:30

Time: 9:30am-11:30am, Sep. 6, 2018

地點:長安校區動力與能源學院大樓225會議室

Place: Conference room 225, School of Power and Energy

主題:兩相流和JP10-空氣爆震的化學分析

Topic: Chemical analysis for two-phase flow and JP10-air detonation

內容簡介:

氫和碳氫化合物的詳細化學反應涉及大量的組分和反應。許多科學家和工程師使用簡單的一步反應(我們稱之為整體化學反應),既不能提供正確的放熱性,也不能提供正確的誘導時間。進一步地,我們必須考慮高壓對超聲速燃燒、爆震燃燒的反應機理的影響。本講座將研究麵向單相和多相流動以及化學反應應用涉及的複雜的反應機製及應對策略。JP10的化學反應很複雜,而且是液相。當我們需要應對液相如液滴時,我們需要考慮蒸發、液滴尺寸,液滴破碎等等一些液相問題。本講座將通過JP10液相爆震以及旋轉爆震發動機的數值分析提供液相的研究策略。

Introduction:

Detailed chemical reactions for hydrogen and hydrocarbons deal with a large number of species and reactions. Many scientists and engineers use simple one-step reactions (we say “overall chemical reactions”), which do not provide either correct exothermicity or correct induction time. More over we have to worry about high pressure effects on such reaction mechanisms for supersonic combustion; say, detonation. This talk will provide numerical study on what we have to do with complicated reaction mechanisms for single- and multi-phase flow chemical reaction applications. A JP-10 reaction is complicated and especially is liquid. When we have to deal with such liquid phase like droplets, we have to take care of several liquid phase problems such as evaporation, droplet size, droplet break-up, and so on. This talk will provide liquid-phase treatments through JP10 liquid-phase detonation and rotating detonation engine through numerical analysis.


報告人:林 光一 教授

Speaker: Prof. A. Koichi Hayashi

主持人:任兆欣 助理教授

Host: Asst. Prof. Zhaoxin Ren

時間:20180907日(星期五) 上午9:30-11:30

Time: 9:30am-11:30am, Sep. 7, 2018

地點:長安校區動力與能源學院大樓225會議室

Place: Conference room 225, School of Power and Energy

主題:用於數值分析和納米鋁/O2爆震的自適應網格細化方法

Topic: AMR method for numerical analysis and Nano Aluminum/O2 detonation

內容簡介:

用於科學和工程問題的數值分析的規模越來越大。但是這種數值計算遇到了時間和成本的問題。為此,自1990年末以來開發了自適應網格細化(AMR)技術。早期AMR用於空間和大氣問題,但最近的精確計算需要AMR方法用於小型分析,例如汽車發動機。本講座將提供AMR的本質解釋及其在燃燒射流問題中的應用。氣固兩相流動與氣液兩相流動完全不同。作為固相爆震問題的一個例子,將會展示鋁/O2爆震問題。特別是當我們處理納米尺寸的顆粒時,我們必須考慮這種納米尺寸的問題。講座將包括解釋這樣的問題進而展示納米鋁的爆震特征。

Introduction:

Numerical analysis for science and engineering problem is applied for a larger and larger scale. But such numerical calculation hits a problem of time and cost. To this end adaptive mesh refinement (AMR) technique has been developed since late 1990. In the early years AMR is used for space and atmospheric problems, but the recent accurate computation demands AMR method for small size analysis such as automobiles engines. The present talk will provide the essence of AMR and its application to a combustive jet flow problem. Soli-gas two-phase flow is, in quite different from liquid-gas two-phase flow. As an example of solid-phase detonation problem, Aluminum/O2 detonation problem will be presented. Especially when we deals with nano-size particles, we must consider such nano-size problem. The talk will include to explain such problem to show the feature of nano-size aluminum detonation.


報告人簡介

 光一,日本青山學院大學機械工程係教授。加州大學伯克利分校碩士,科羅拉多大學博爾得分校博士。林 光一教授是爆震研究的國際領導者,最新的工作包括圓管和矩形管中爆震結構的三維詳細數值計算,以及三維旋轉爆震。現任國際激波會議谘詢委員會委員,日本爆炸學會理事,《Proceedings of Combustion Institute》編委等。曾任日本爆震協會主席,《Shock Waves》編委等。曾獲國際爆炸動力學和反應係統最高榮譽A. K. Oppenheim獎,波蘭科學院Wactaw Cybulski獎章等。

Speaker’s Biography

A. Koichi Hayashi is the professor in Aoyama Gakuin University. He obtained his M.Sc. in UC Berkeley and Ph.D. in University of Colorado, Boulder. He has been an international leader of detonation study. The most recent work includes three-dimensional detailed numerical calculation of detonation structures in tubes and spinning detonations. He is the international advisory committee member of Int. Symp. on Shock Waves, board member of Japan Explosion Society, editorial board member of Proceedings of Combustion Institute, et al. He was the president of Detonation Society in Japan, editorial board member of Shock Waves, et al. He was awarded the A.K. Oppenheim Award from IDERS, Wactaw Cybulski Medal from Poland Academy of Science, et al.