
n. [熱] 燃燒動力學
Starting from the integral equation of thermal kinetics, a new characteristic equation of combustion is derived.
從熱動力學積分方程出發建立了新型燃燒特征方程。
The combustion kinetics of partial gasified coal char was stu***d by two-stage distributed activation energy model (ts-DAEM).
運用兩段DAEM模型分析了部分氣化煤焦的燃燒動力學。
A reduced model of dimethyl ether (DME) was developed based on the detailed kinetics model by analyzing in reaction paths of combustion of DME and sensitivity.
在詳細反應動力學研究基礎上,通過對*********醚(DME)均質壓燃燃燒反應途徑和敏感性分析,建立了均質壓燃*********醚的簡化動力學模型。
The surface terms are induced in chemical thermodynamics and kinetics, and effects of particle sizes on combustion and pyrolysis of coal particles are analysed and discussed.
采用熱重法,對兩個不同煤種的單顆粒型煤在不同成型壓力下的熱解過程進行了研究,得到了成型壓力對單顆粒型煤熱解失重的影響規律。
Combustion chemical kinetics is one of the important part of the computed combustion.
燃燒化學反應動力學是計算燃燒學中的重要内容之一。
Based on the thermochemistry and chemical kinetics, the combustion mechanism and flowing direction of combustion heat for the three main species of solid fuels was stu***d.
應用化學熱力學和化學動力學原理,研究了煤礦中三種主要固體燃料的燃燒機理及燃燒熱的流向;
Over the years, the design methods of burner rely on traditional empirical model, which did not fully add the effect of reaction kinetics and fluid dynamics to the combustion field.
長期以來,燃燒爐多是依靠傳統經驗模型進行設計,未充分考慮反應動力學及流體動力學對爐内燃燒場的影響。
It is necessary to study the combustion thermodynamics and kinetics for the research of SHS-densification.
燃燒合成熱力學和動力學的研究是探讨SHS-緻密化的基礎。
By using the model and detailed chemical kinetics of Dimethyl Ether(DME)oxidation, HCCI combustion of DME in a ***sel engine is numerically simulated and tested.
采用該模型并利用*********氧化的詳細化學反應動力學機理,對*********燃料在柴油機上的均質壓縮燃燒HCCI進行了模拟計算和試驗研究。
However, this method is not valid for mixture of two combustible gases that are very different in combustion kinetics.
但對由兩種以上可燃氣體************,由于燃燒動力學上的差異,不能利用拐點法确定爆炸極限上限。
This indicates that the combustion of PC can be divided into three phases: kinetics control, diffusion control and again kinetics control.
說明石油焦的燃燒經曆動力控制到擴散控制最後再動力控制的過程。
History matching with combustion-tube test was conducted to obtain the kinetics, and two kinds of reactions, oxidation reaction and combustion reaction were used in the study.
通過曆史拟合燃燒管實驗獲得了原油的反應動力學參數和兩種反應模式,研究使用了“氧化反應”和“燃燒反應”。
It is very import to understand the low-temperature oxidation mechanism of the primary reference fuels, because HCCI combustion is controlled by the chemical kinetics.
由于HCCI燃燒主要受化學動力學控制,研究碳氫燃料特别是參比燃料的化學動力學反應,有助于理解燃料性質對HCCI着火與燃燒的影響與控制。
A kinetic equation for combustion of coke fines composed of different grain sizes in sintering is established and an analysis for kinetics was carried out in this paper.
本文建立了燒結用不同粒級焦粉混合燃燒的動力學方程,并進行了相應的動力學實驗分析。
The operation region of ethanol HCCI combustion was investigated using 0-D single zone HCCI mode coupled with detailed chemical kinetics mechanism of ethanol oxidation.
應用0-D單區HCCI發動機模型耦合乙醇氧化反應詳細化學動力學機理,對乙醇HCCI發動機的工作區域進行了模拟研究。
The kinetics of dechlorination of Ca-based sorbents was explored in this paper, in order to confirm the factors that control the reaction rate in the combustion.
從動力學方面對鈣基吸收劑在燃燒過程中脫氯機理進行探讨,旨在明确燃燒過程各種影響因素對脫氯反應速率的影響。
The principles, characteristics and economical analysis of catalytic combustion lor organic waste gases, and also the study progress of catalyst, kinetics and technical process etc were summarized.
對催化燃燒處理有機廢氣的基本原理、特點及經濟性,以及催化劑、動力學和工藝流程等研究進展進行綜述。
HCCI combustion process is hard to control because it is dominated by chemical kinetics of fuel air mixture.
控制着火時刻和燃燒反應速率以及擴展運行工況範圍是發動機實現HCCI燃燒的關鍵和難點。
燃燒動力學(kinetics of combustion)是研究燃燒過程中化學反應速率、反應路徑及其影響因素的學科領域,屬于物理化學與工程熱力學的交叉分支。其核心在于揭示燃料與氧化劑(如氧氣)發生化學反應生成最終産物(如二氧化碳、水)的詳細步驟與時間尺度。以下是詳細解釋:
反應機理
燃燒并非一步完成,而是通過鍊式反應(chain reaction)進行。以甲烷燃燒為例,包含引發(如 $ce{CH4 -> CH3 + H}$)、增殖(如 $ce{CH3 + O2 -> CH3O + O}$)和終止(如 $ce{H + O2 + M -> HO2 + M}$)等步驟。自由基(如 $ce{OH}$、$ce{H}$)作為中間體驅動反應持續進行。
反應速率方程
反應速率遵循阿倫尼烏斯定律(Arrhenius equation):
$$ k = A e^{-E_a / RT} $$
其中 $k$ 為速率常數,$A$ 指前因子,$E_a$ 為活化能,$R$ 為氣體常數,$T$ 為溫度。高溫下反應速率呈指數級增長。
溫度與壓力
燃料特性
分子結構決定反應路徑:烷烴易發生β-斷裂生成小分子自由基,而芳香烴因共振穩定需更高活化能。
混合狀态
燃料與氧化劑的混合均勻度直接影響擴散火焰(diffusion flame)的反應速率,湍流可加速混合并提升燃燒效率。
污染物控制
降低燃燒溫度可抑制熱力型 $ce{NO_x}$ 生成($ce{N2 + O2 -> 2NO}$),其活化能高達318 kJ/mol。
燃燒穩定性
研究點火延遲時間(ignition delay time)對超燃沖壓發動機設計至關重要,例如氫燃料在Ma>7時的延遲時間需控制在毫秒級。
新型燃料開發
生物燃料的氧化路徑包含醛類中間體(如 $ce{CH3CHO + OH -> CH3CO + H2O}$),需針對性優化反應機理。
(注:以上鍊接均為可訪問的權威學術資源,更新于2025年)
Kinetics of Combustion 指燃燒過程的動力學,主要研究燃燒反應的速率、機理及影響因素。以下是詳細解釋:
燃燒速率常用阿倫尼烏斯方程表示:
$$
k = A cdot e^{-frac{E_a}{RT}}
$$
其中,(k)為速率常數,(A)為指前因子,(E_a)為活化能,(R)為氣體常數,(T)為溫度。
如需更深入的技術細節(如具體反應模型),可參考燃燒學或化學動力學教材。
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