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发表于 2025-3-25 03:50:18
Social Business City: Lessons from Wiesbadenchemical reactions are fast compared to the other processes like diffusion, heat conduction, and flow, thermodynamics alone allow the description of the system locally (see, e. g., Section 13.1). In most cases, however, chemical reactions occur on time scales comparable with that of the flow and of
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发表于 2025-3-25 10:26:39
Antonio Francisco Jiménez Jiménezactions for a satisfactory chemical mechanism. For combustion of hydrocarbon fuels, as simple as methane CH., the number of elementary reactions in the chemical mechanism is much larger. In some cases several thousands of elementary reactions (e. g., in the case of autoignition of the Diesel fuel wi
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发表于 2025-3-25 13:59:21
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发表于 2025-3-25 16:34:44
Markus Beckmann,Anica Zeyen,Anna Krzeminskaixing. . flames were introduced as a basic flame type in Chapter 1. In nonpremixed flames, fuel and oxidizer react as they mix; examples of nonpremixed flames are given in Table 1.2. In this chapter, the standard model of laminar nonpremixed flames is developed. The extension of this model to a quan
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发表于 2025-3-25 20:43:21
Zarjina T. Khalil,Mehdi Hussaine-independent. The time-dependent process of starting with reactants and evolving in time towards a steadily burning flame is called .. Ignition processes are always time-dependent. Examples of ignition processes include induced ignition (such as occurs in gasoline engines induced by a spark), autoi
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发表于 2025-3-26 02:51:58
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发表于 2025-3-26 06:21:37
André Uhl,Edgar Göll,Marco Wedelal nonpremixed flame has fast (equilibrium) chemistry that rapidly adjusts to the local mixture fraction; the mixture fraction is constantly changing. The unburnt gas in an ideal premixed flame is completely mixed before chemistry begins. Then the ideal premixed flame has a delta function PDF for mi
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发表于 2025-3-26 12:21:21
Social Business – Eine Einführung the fuel starts as a liquid, or as a solid, which is then burnt by a gaseous oxidizer. Examples of the combustion of liquids include that in jet aircraft engines, Diesel engines, and oil fired furnaces. Examples of combustion of solids include that of coal, wood (in forest and building fires), plas
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发表于 2025-3-26 16:09:42
Julia Friedrich,Mandy Wölke,Vanita Römerment of engine technology and related fuel technology. Such improvements aim at the efficient use of fuels with a minimum amount of pollutant emissions. In the specific case of the spark ignited engine, i. e., the Otto engine, a thermodynamic analysis of the engine cycle shows that overall efficienc
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发表于 2025-3-26 19:04:05
https://doi.org/10.1007/978-3-658-33371-3damage. The major combustion products are carbon dioxide and water. These products were, until recently, considered harmless. Now, even the carbon dioxide is becoming a significant source in the atmospheric balance, and concerns of a global greenhouse effect are being raised.