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Automatic Generation of Reduced Mechanisms and Their Applications to Combustion Modeling

簡化化學反應機構的自動研導及其燃燒模式的應用

Abstracts


本文報導近來簡化化學反應機構的自動研導及應用。以作者及研究生發展的電腦程式及一個十步甲烷簡化反應機構爲例,來詳述研導及測試的細節。此電腦程式可在短時間內將一個大型化學反應機構自動簡化成一個小型反應機構,並且自動寫出所需的電腦程式,避免人爲的錯誤,大大縮短研導的時間及精力。在應用之前,簡化化學反應機構須經一系列測試以確保精確度,這些測試含跨不同燃燒區域,包括預混火焰燃燒速度,熄火極限,自燃遲引時間,及一些與混合、燃燒有關的現象。本文亦討論應用這個簡化反應機構方法於二維或三維大型混流燃燒數值模式之適用性。

Parallel abstracts


Recent advances in automation of systematically reduced mechanisms are reported here with the aim to provide information for applications in computational fluid dynamics. A computer algorithm developed by the author's research group and associates is described in detail for fast generation and testing of reduced chemistry. This algorithm has been used to develop various reduced mechanisms of methane-air combustion for modeling of turbulent combustion. For illustration purpose, a 10-step reduced chemistry is used as an example for showing the development procedures and its performances in predictions of a wide range of flame phenomena, including general flame characteristics, flame extinction limits, flame propagation speeds, and auto-ignition delay times Strategies for using such an extensive reduced chemistry for modeling turbulent combustion are discussed.

Parallel keywords

Reduced Chemistry combustion numerical model

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